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HEMI: Intake to Heads Oil Leak #1420295
04/15/13 02:43 PM
04/15/13 02:43 PM
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Lima, Peru
domingo Offline OP
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Hi guys!

This is the 3rd time Im having to remove my intake because it keeps sucking oil from the Valley area into the intake ports and then into the chambers, fouling the plugs with oil after a few minutes of running time....

I have checked proper alignment, bolt interference with the intake bolt holes, etc....face of intake is parallel with heads....so its not that the faces are crooked and not sealing right one against the other, they are nice and parallel whenI shim them and then I check them with a gauge on all 4 corners.

I have glued the head side of the gasket to the head with silicone, and I have left the intake side of the gasket with NO silicone, just some grease....but its still sucking oil.

Im sick of this so Im just gonna silicone both side of the gasket to assure a tight leakproof seal.

Now, my other concern is the torque Im applying to the intake bolts.

Richard Nedball's book asks for 25 ft-lbs torque on these bolts....but it sure looks like a lot to me. Its just 1/4" bolts threading into ALUMINUM cylinder heads.

I have just tightened them with a small socket wrench till I felt they were were tight enough, didnt want to overtighten them and risk stripping threads on my brand new ALUMINUM heads!!

Should I just go ahead and torque them at 25 lbs-ft??? Is it safe to do so on aluminum heads? Still it sound like a lot for such a small fastener threading into aluminum.


Re: HEMI: Intake to Heads Oil Leak [Re: domingo] #1420296
04/15/13 03:06 PM
04/15/13 03:06 PM
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I would go back and re-read that part in book, it should be inch lbs not 25 lbs. Thanks / Gary

Re: HEMI: Intake to Heads Oil Leak [Re: hemi-challenger] #1420297
04/15/13 04:15 PM
04/15/13 04:15 PM
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Stuttgart, Arkansas
rickseeman Offline
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Ditto, re-read that. It's 72 in lbs on some and I think 48 in lbs on the others. Thats 4 ft lbs and 6 ft lbs!!! The proper intake torque and sequence is in the Mopar Hemi engine manual which should be on top of your work bench.


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Re: HEMI: Intake to Heads Oil Leak [Re: rickseeman] #1420298
04/15/13 05:33 PM
04/15/13 05:33 PM
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Lima, Peru
domingo Offline OP
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Yes, I do have the MOPAR HEMI ENGINES Bible and it states the tq figures in in-libs and it states to use different torque figures on the center bolts than on the outers.....

There is a majour mistake there on Richard Nedball's book. And I was right about it, its waaaay too much torque!!! I see some people will strip their threads following the suggestions on that book.

Also, it states someplace else to torque the valley head bolts to the same torque as the rest of the head bolts....which will probably cause the intake valve seats to distort and not seal right....

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Re: HEMI: Intake to Heads Oil Leak [Re: domingo] #1420299
04/15/13 06:03 PM
04/15/13 06:03 PM
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Stuttgart, Arkansas
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I love Rich and his book is the best but it is wrong on this. Use the torque values and sequence in the Mopar Hemi engine book. That is the only way to do it right. The bolts will loosen up after you run it several times. Retorque every month until it settles in. If possible I prefer to use studs on aluminum heads. I get mine from ARP.


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Re: HEMI: Intake to Heads Oil Leak [Re: rickseeman] #1420300
04/15/13 07:05 PM
04/15/13 07:05 PM
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Minnesota
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I read somewhere that because the bolts are verticle, if you over-tork the intake bolts, it can wedge the heads apart and crack the block!


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Re: HEMI: Intake to Heads Oil Leak [Re: domingo] #1420301
04/15/13 07:46 PM
04/15/13 07:46 PM
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wappinger falls new york
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domingo make sure it is not the cylinder head studs in the intake ports sucking oil up and through, also if the heads are ported do they have brass tubes for the push rod holes?sometimes those leak.

if those two parts are ok i would only use mr gasket intake gaskets, glue them to the cylinder heads and let the glue "set up", silicone the face of the gasket and the bottom of the intake ports, the silicone will allow the intake to slide down on the gasket as you tighten it down with out pulling the gasket with it.

is this a mp cross ram? or single 4 bbl? if it is a cross ram use lots of silicone down the bolt holes to keep them sealed as well.

Re: HEMI: Intake to Heads Oil Leak [Re: Jimi_Vignogna] #1420302
04/15/13 08:17 PM
04/15/13 08:17 PM
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Lima, Peru
domingo Offline OP
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Its a stage V dual carb intake. Known as the RAT BUSTER.

I redid this once more. I put silicone both sides.

I torqued it down per the Mopar HEMI BIBLE and we'll see if this time around it seals.

The oil is seeping through from the intake to head joint. When I take out the carbs this intake is big enough to let me see that there is oil right at the seam between the intake and heads. every time is the same. Its the first time im using silicone on both sides of the gasket....lets see how it holds up this time....

I also put some goo on the outside bottom of the intake port so it seals up with the intake when torqued down, I hope it helps sealing...

Re: HEMI: Intake to Heads Oil Leak [Re: domingo] #1420303
04/15/13 10:11 PM
04/15/13 10:11 PM
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Temperance, MI
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i had this same problem on my motor. stage v heads and mopar performance x-ram(has very bad port alignment on bottom of runners) I glued the gaskets to the heads with 3m weatherstrip adhesive and ran a thin bead of silicone around each port. 6 years and no leaks. I have seen over tightening of the intake cause the heads to leak water out of the corners, retorqued and it was fine

Re: HEMI: Intake to Heads Oil Leak [Re: prochargedhemi] #1420304
04/15/13 10:54 PM
04/15/13 10:54 PM
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Sonora CA
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Sorry guys. Definitely a typo there. I have been seeing a lot more of this problem lately. On the last few engine I did these steps:
* I glued the Mr. G 303G gaskets to the heads using Gasgacince.
* Bolted on the manifold for an hour to press the gasket to the head.
* Removed the manifold and trimmed the gasket to the port using an Exacto.
* On the manifold side I used "The Right Stuff" around each port, spread very thin with my finger.
* Bolted on the manifold using the torque sequence.
* Went over all the bolts several times until there was no more movement.

Not a leak since...

Re: HEMI: Intake to Heads Oil Leak [Re: Mopar_Rich] #1420305
04/15/13 11:41 PM
04/15/13 11:41 PM
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Stuttgart, Arkansas
rickseeman Offline
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Another thing to check is intake fit. Let's say the block was decked alot. Now the holes in the intake don't line up with the threads in the heads. The intake bolts end up hitting the sides of the intake. You can be tightening the intake and it feels snug but you are really just jamming the bolts. To check this, put intake manifold studs in the heads, (best without the intake gaskets on), and see if the intake manifold will slide all the way down to the head. If not you will have to get a rat tail file and elongate the holes in the intake manifold until it will slide down to the head without wedgeing into the studs.


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Re: HEMI: Intake to Heads Oil Leak [Re: domingo] #1420306
04/16/13 12:04 AM
04/16/13 12:04 AM
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Bend,OR USA
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Be very careful on which type silicone you use on intake gaskets, I like and use "adhesive" silicone only on any gasket that is exposed to oil Make sure the label says Adhesive silicone, not gasket maker or any other label Let it dry 24 hrs or more

Last edited by Cab_Burge; 04/16/13 12:06 AM.

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Re: HEMI: Intake to Heads Oil Leak [Re: Cab_Burge] #1420307
04/16/13 12:25 AM
04/16/13 12:25 AM
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I have pretty good luck with the Permatex gray..

I didn't read any comments for checking gasket thickness. If you have too thin a gasket, it could appear to be clamping down enough but isn't.

Re: HEMI: Intake to Heads Oil Leak [Re: 52savoy] #1420308
04/16/13 12:35 AM
04/16/13 12:35 AM
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Great Neck,LI,new york
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Had my intake off last week.Used the Mr G 303G and "The Right Stuff to glue everything back together

Thanks again Rich

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Re: HEMI: Intake to Heads Oil Leak [Re: rickseeman] #1420309
04/16/13 11:31 AM
04/16/13 11:31 AM
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Lima, Peru
domingo Offline OP
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Quote:

Another thing to check is intake fit. Let's say the block was decked alot. Now the holes in the intake don't line up with the threads in the heads. The intake bolts end up hitting the sides of the intake. You can be tightening the intake and it feels snug but you are really just jamming the bolts. To check this, put intake manifold studs in the heads, (best without the intake gaskets on), and see if the intake manifold will slide all the way down to the head. If not you will have to get a rat tail file and elongate the holes in the intake manifold until it will slide down to the head without wedgeing into the studs.




I caught this the first time around and elongated the manifold holes....still after doing this im still sucking oil into the intake ports.....

Re: HEMI: Intake to Heads Oil Leak [Re: domingo] #1420310
04/16/13 11:36 AM
04/16/13 11:36 AM
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Lima, Peru
domingo Offline OP
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I glued it back on with grey silicone on both sides. Torqued the 4 center bolts more than the 4 outers....

we will see if the problem is solved this time around....

I used a set of MR Gasket 0,060 gaskets....even though they are thicker than what Id like to use for better port alignment(0,030 would be better) I am gonna try this time with the thicker ones to see if they seal better.

Port aignment is not exactly on center, its like the intake would like a thinner gasket to go down a bit more so the intake ports are more on center with the head ports....

although the intake is sitting a bit high and the ports are not perfectly concentric, I am still not seeing a "step" whhen looking down from the carb opening into the intake ports. The top oprtion of the intake runner is perfectly flush with the port roof on the heads, and the lower portion of the intake runner sits about 1/8" higher than the intake port...(the stage V intake ports are smaller than the head ports...the heads are CNCd and gasket matched,k the stage V intake is untouched, hence the smaller runner openings).

Re: HEMI: Intake to Heads Oil Leak [Re: hemi-itis] #1420311
04/16/13 11:54 AM
04/16/13 11:54 AM
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Eighty Four, PA
B G Racing Offline
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If leaking at the bottom persist carefully check the following areas:
Head to manifold alignment(top to bottom)
Head to manifold angle and gasket thickness that's required.
Manifold to block rail spacing(make sure nothing is holding the manifold up)
Head intake surface flat and not cut at an incorrect angle front to back,Check same for the intake surface.
Make sure there is no warped surfaces.
The angle and straightness can be checked buy using four block(steel) guages at all four corners then check all the areas at each port for discrepencies and if the four corners don't set tight on the corner guages then you know something is out of square.
We usually use 2"X 1"X .060 thick block steel guages at all four corners and check for the manifold setting flush on the guages and then pass a aluminium welding rod flattened to just a hair under .060 through the port area to see if it's loose or tight in any one spot.
We never use any torque values when tightening the intakes but use a sequence of side to side and repeat till there is no more bolt rotation with a 1/4 drive then we repeat it after the engine has heat cycled a few times.We also recheck them every few seasons if the engine sets for long period of time.

Re: HEMI: Intake to Heads Oil Leak [Re: domingo] #1420312
04/16/13 12:01 PM
04/16/13 12:01 PM
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Dom
what are you using to seal the ends of the intake to the block? Are you just using silicone or are you using the gasket that is supplied with the intake gaskets for the end rail. I had a problem with those gaskets holding the intake up too high and the intake gaskets would not seal properly. I left out those end gaskets on each end and just used silicone on the ends and then the intake gaskets sealed up on the ports with no leaks.
Just a thought


Old Geezer Racing
Re: HEMI: Intake to Heads Oil Leak [Re: SCATPACK 1] #1420313
04/16/13 01:10 PM
04/16/13 01:10 PM
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Lima, Peru
domingo Offline OP
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Yep guys, I checked all of that and it all seems to be OK.

So Ill run it one more time after all the MEGA SILICONE APPLY and see if it seals up good.

If not, its tear down time again...Ill recheck everything and use a different brand gasket and a different brand gasket adhesive.....

Thanks for all the suggestions!

Re: HEMI: Intake to Heads Oil Leak [Re: domingo] #1420314
04/17/13 08:29 AM
04/17/13 08:29 AM
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malvern, ohio
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Dom: cometic makes a thinner gasket, .045 I think, and that's what I ended up using. The only thing I did different was I glued the gasket to the intake so if I had to change it again I would not be scraping in to the lifter valley. That is for a newer mp cross ram on a street car. Dave

Re: HEMI: Intake to Heads Oil Leak [Re: 3ddart] #1420315
04/17/13 09:01 AM
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Greg,(Superformance) make .030 and.060 gaskets.

Last edited by B G Racing; 04/17/13 11:15 AM.
Re: HEMI: Intake to Heads Oil Leak [Re: B G Racing] #1420316
04/17/13 12:48 PM
04/17/13 12:48 PM
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louisiana
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I use FLATOUT gaskets they come in all port sizes and thickness and will make you custom gaskets if they don't have what you need.

Re: HEMI: Intake to Heads Oil Leak [Re: B G Racing] #1420317
04/17/13 01:37 PM
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Quote:

Greg,(Superformance) make .030 and.060 gaskets.





Thanks Bob

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Re: HEMI: Intake to Heads Oil Leak [Re: roadhazard] #1420318
04/17/13 03:25 PM
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Quote:

Quote:

Greg,(Superformance) make .030 and.060 gaskets.





Thanks Bob

No thanks needed,thank you for some great gaskets and great customer service.

Everything is listed in our new catalog.
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Re: HEMI: Intake to Heads Oil Leak [Re: B G Racing] #1420319
04/17/13 10:24 PM
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Quote:

Quote:

Quote:

Greg,(Superformance) make .030 and.060 gaskets.





Thanks Bob

No thanks needed,thank you for some great gaskets and great customer service.

Everything is listed in our new catalog.
Click the link in my signature







Hey Bob, if we didn't offer a great product with competitive prices and great service we'd just be considered a government entity

Re: HEMI: Intake to Heads Oil Leak [Re: roadhazard] #1420320
04/18/13 08:34 AM
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Re: HEMI: Intake to Heads Oil Leak [Re: B G Racing] #1420321
04/19/13 09:54 AM
04/19/13 09:54 AM
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Lima, Peru
domingo Offline OP
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still leaking....when i take the carbs out I can feel "oily gasoline" on the intake to heads joint, and puddling on the intake valves that remain closed....its not just gasoline.


Re: HEMI: Intake to Heads Oil Leak [Re: domingo] #1420322
04/19/13 10:41 AM
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Dom
What heads are you using?
Is it possible to use a valley tray that would seperate the intake and lifter galley.


Old Geezer Racing
Re: HEMI: Intake to Heads Oil Leak [Re: SCATPACK 1] #1420323
04/19/13 10:47 AM
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I am using a set of the older MP aluminum head castings (not the edelbrocks) with a stage V intake. I have a stock style heat shield under the intake.

Thats it.

I installed it with silicone on both sides and I still can find oily gasoline in there.

I am starting to think it might be sucking oil through the intake port brass sleeves??? These heads got the full porting treatment and blueprinting and the pushrod holes are bushed with bronze sleeves.

Funny thing is I could see oily gasoline on the head to intake joint and also puddling on the intaka valve on one of the ports that has NO PUSHROD SLEEVE showing!...so I dont know if that would be the problem....doesnt seem like it.

Man, now I wish I would have had this engine run on the Dyno before importing it.

I think Im just pullling of the heads to see if the valve guides have the rihgt clearance, check out the valve seals, take a closer look at the heads, reinstall them with new gaskets and check out if the inner valley studs are torqued to 45 lbs. I will but one of those extensions to be able to torque em with my torque wrench to the exact spec, etc.

Re: HEMI: Intake to Heads Oil Leak [Re: domingo] #1420324
04/19/13 10:54 AM
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Quote:

still leaking....when i take the carbs out I can feel "oily gasoline" on the intake to heads joint, and puddling on the intake valves that remain closed....its not just gasoline.







I would look for another issue,it could be a valve, ring or piston problem.If you want to check the gasket seal you can spray a libral amont of light oil(WD-40) in the intake and make plates to cover the carb holes and put an air valve in one,remove all the pushrods to make sure all valves are closed and carefully charge the intake(it only takes a few pounds of air for this).You can view the underside of the intake with a borescope ,mirror or other means for a fine mist if the gaskets leak.This sound like a lot of effort,but it will determine if that or something else is the issue.We had a Hemi that put oil in the intake and it turned out that it had one piston that had detonated and hurt the ring lands and rings.Another thought you might try is put a borescope in each sparkplug hole and check the condition of each piston.
I'am throwing out suggestions since everything you have tried so far hasn't solved your problem.

Re: HEMI: Intake to Heads Oil Leak [Re: domingo] #1420325
04/19/13 12:14 PM
04/19/13 12:14 PM
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Marion, South Carolina [><]
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Did you put thread sealer on the inner row of head studs that thread into the bottom of the intake ports?


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Re: HEMI: Intake to Heads Oil Leak [Re: an8sec70cuda] #1420326
04/19/13 12:57 PM
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Run it through a couple of heat/cool cycles and re torque or tighten the intake bolts again. then run it again and se if it is still doing it. When you pull the intake and look at the gaskets, do they look oily anywhere on the gaskets? Problem may not be the gaskets if you have tried all of this.


Old Geezer Racing
Re: HEMI: Intake to Heads Oil Leak [Re: domingo] #1420327
04/19/13 01:55 PM
04/19/13 01:55 PM
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Mt. Eden Ky.
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I had the same problem and symptoms on a Hemi with those same MP heads. I finally pulled the valve spring off an intake valve and was able to move the valve side ways .004" .005". The guides were way too loose. These were a new set of heads too.
I would think that Modern would catch this on your engine though as that is who fixed mine.
Once the guides were repaired all was good. I have been told the factory guides are oversize and soft.


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Re: HEMI: Intake to Heads Oil Leak [Re: Hemi Allstate] #1420328
04/19/13 02:46 PM
04/19/13 02:46 PM
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Lima, Peru
domingo Offline OP
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These heads wereblueprinted , inluding replacing guides if it was needed.

However seeing IM having all these issues IM gonna pull those heads and recheck everything.

Oh BTW, Im thinking....would it be that overtorquing the valley head bolts it would cause the intake port surface that mates the intake manifold to warp and cause sealing issues???

I know that torquing those bolts on alum heads to the cast iron head specs that Mopar reccomends will cause the intake seats to distort and screw up the intake valve sealing.....but could it also distort the intake port surface to the point that it would cause intake to head sealing issues???

I did not torque those heads down, Im clueless about that torque is on those bolts now.....

Re: HEMI: Intake to Heads Oil Leak [Re: domingo] #1420329
04/19/13 06:33 PM
04/19/13 06:33 PM
Joined: Jun 2009
Posts: 1,212
QLD Australia
Keith Black® Offline
pro stock
Keith Black®  Offline
pro stock

Joined: Jun 2009
Posts: 1,212
QLD Australia
If you're pulling the heads anyway , get Tim to machine the intake side for O-rings. He's just done my heads I'll post pictures later.


--------------------------------
Darren Beale
Keith Black Racing Engines®
Re: HEMI: Intake to Heads Oil Leak [Re: Keith Black®] #1420330
04/20/13 10:37 AM
04/20/13 10:37 AM
Joined: Jan 2003
Posts: 9,670
Lima, Peru
domingo Offline OP
EL Master
domingo  Offline OP
EL Master

Joined: Jan 2003
Posts: 9,670
Lima, Peru
would be nice, but Im probably as far away from Tim as you are....I dont see myself shipping any parts of this engine back to the states to perform any work on them. I will have to figure it out myself down here....

Re: HEMI: Intake to Heads Oil Leak [Re: domingo] #1420331
04/23/13 03:28 AM
04/23/13 03:28 AM
Joined: Jun 2009
Posts: 1,212
QLD Australia
Keith Black® Offline
pro stock
Keith Black®  Offline
pro stock

Joined: Jun 2009
Posts: 1,212
QLD Australia
yep I understand Dom. here's some pictures anyway I figured it would be worthwhile as some of the members on here indicated similar problems to what you're having.
hope it works on my build

7679086-IMG_0667(2).JPG (135 downloads)

--------------------------------
Darren Beale
Keith Black Racing Engines®
Re: HEMI: Intake to Heads Oil Leak [Re: Keith Black®] #1420332
04/23/13 03:32 AM
04/23/13 03:32 AM
Joined: Jun 2009
Posts: 1,212
QLD Australia
Keith Black® Offline
pro stock
Keith Black®  Offline
pro stock

Joined: Jun 2009
Posts: 1,212
QLD Australia
2

7679090-IMG_0665(2).JPG (104 downloads)

--------------------------------
Darren Beale
Keith Black Racing Engines®
Re: HEMI: Intake to Heads Oil Leak [Re: Keith Black®] #1420333
04/23/13 10:14 AM
04/23/13 10:14 AM
Joined: Jan 2003
Posts: 9,670
Lima, Peru
domingo Offline OP
EL Master
domingo  Offline OP
EL Master

Joined: Jan 2003
Posts: 9,670
Lima, Peru
those look great.

I suspect it might be sucking some from the threads on the inner valley bolts. Like Chip suggested Im gonna use some thread sealer in there....

Im also gonna use some penetrating locktite sealer on the pushrod sleeves.

and when the heads are out check vave guide clearance and valve seals...

Re: HEMI: Intake to Heads Oil Leak [Re: domingo] #1420334
04/24/13 09:24 AM
04/24/13 09:24 AM
Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
B G Racing Offline
master
B G Racing  Offline
master

Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
Quote:

those look great.

I suspect it might be sucking some from the threads on the inner valley bolts. Like Chip suggested Im gonna use some thread sealer in there....

Im also gonna use some penetrating locktite sealer on the pushrod sleeves.

and when the heads are out check vave guide clearance and valve seals...





Another thing to check is crankcase ventilation,if it's not vented enough or has high crankcase pressure, the crankcase pressure along with cylinder draw can push and pull oil into intakes,bolt threads and other areas that wouldn't normally see oil.

Re: HEMI: Intake to Heads Oil Leak [Re: B G Racing] #1420335
04/24/13 11:54 AM
04/24/13 11:54 AM
Joined: Jan 2003
Posts: 9,670
Lima, Peru
domingo Offline OP
EL Master
domingo  Offline OP
EL Master

Joined: Jan 2003
Posts: 9,670
Lima, Peru
I got the evac lines to the exhaust!

Re: HEMI: Intake to Heads Oil Leak [Re: domingo] #1420336
04/24/13 04:04 PM
04/24/13 04:04 PM
Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
B G Racing Offline
master
B G Racing  Offline
master

Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
Quote:

I got the evac lines to the exhaust!





Make sure they are scavenging correctly.Some time the angle of the tube in the collector will not draw properly or if they are to far back to create a draw.

Re: HEMI: Intake to Heads Oil Leak [Re: B G Racing] #1420337
04/24/13 05:19 PM
04/24/13 05:19 PM
Joined: Jan 2003
Posts: 9,670
Lima, Peru
domingo Offline OP
EL Master
domingo  Offline OP
EL Master

Joined: Jan 2003
Posts: 9,670
Lima, Peru
They are installed per the instructions that cam with it!

And I can tell they are working because they were full of whiteish sludge and drops of water after I fired it up.


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