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Hemi Oiling question #554383
12/15/09 02:15 PM
12/15/09 02:15 PM
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az426john Offline OP
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I am priming the oil system on my hemi motor after having it rebuilt by an experienced local engine rebuilder. I am using a drill motor that says it rotates at 880 rpm (Min).

I have oil out the end of the exhaust rocker arms on the passangers side, but not the intake. I have no oil to the either rockers on the drivers side.

I am turning the engine over with a ratchet while running the pump with the drill motor.

Has anyone experienced this after a rebuild or am I doing something wrong?

Post deleted by Defbob [Re: az426john] #554384
12/15/09 02:19 PM
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Re: Hemi Oiling question #554385
12/15/09 02:30 PM
12/15/09 02:30 PM
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Eighty Four, PA
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Hemis are a pain,loosen the bolts that hold the rocker shafts,one on each corner of the intake and exhaust shaft(4 bolts)to eliminate any air block.Use a good hi-speed drill and turn counter clock wize.Also prime the oil filter,spin the crap out of it and as you get oil to the loosened bolts tighten each one down. There are only 4 of the stock stands drilled for oil passages,don't mix them up.You can pull the rocker stands off to make sure you are getting oil through the head.If your using head studs take out the one second from the back that holds the stands down,sometimes they restrict the oil passages,use an undercut bolt or stud or ream out the hole.

Re: Hemi Oiling question [Re: B G Racing] #554386
12/15/09 06:44 PM
12/15/09 06:44 PM
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az426john Offline OP
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Guy's,

Thanks for the great advise.

Backing the 2 end bolts off of the rocker arm stands resulted in oil to the passangers side intake rocker shaft. So the passengers side is good to go.

However, there is no evidence of oil on the drivers side on either the intake or the exhaust rocker arm shaft.

I spun the motor on the starter while running the drill motor in reverse. Still no oil to the drivers side. I guess it is time to pull the rocker assembly off the DS and see what is going on.

Re: Hemi Oiling question [Re: az426john] #554387
12/15/09 06:51 PM
12/15/09 06:51 PM
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Quote:

Guy's,

Thanks for the great advise.

Backing the 2 end bolts off of the rocker arm stands resulted in oil to the passangers side intake rocker shaft. So the passengers side is good to go.

However, there is no evidence of oil on the drivers side on either the intake or the exhaust rocker arm shaft.

I spun the motor on the starter while running the drill motor in reverse. Still no oil to the drivers side. I guess it is time to pull the rocker assembly off the DS and see what is going on.




Try turning the engine slow with a ratchet while priming. Takes a while the first go around. Get some Comp Cams spray lube and spray the snot out the valve train. This will make sure everything is happy until full oil is flowing up there).

Re: Hemi Oiling question [Re: torkrules] #554388
12/15/09 07:00 PM
12/15/09 07:00 PM
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Eighty Four, PA
B G Racing Offline
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Most Hemi cams are grooved on the 4th journal.If not start the marks at TDC and spin the drill,then turn it 90 degrees and stop and spin the drill again,do this each 90degrees till your back at TDC.IF you still get no oil pull the rocker stand hold down bolt 2nd from the back.If you get oil check your stands for the correct one with oil passages.If still no oil look to an improperly installed cam bearing.The bearing can line up two holes and cover the third if not installed correctly.

Re: Hemi Oiling question [Re: B G Racing] #554389
12/16/09 02:56 PM
12/16/09 02:56 PM
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az426john Offline OP
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I put a timing tape on the harmonic balancer and turned the engine over in 90 degree increments starting at TDC. I ran the drill for 1 minute at each increment. I still had no oil to the drivers side rockers.

I pulled the rocker stand hold down bolt 2nd from the back, ran the drill for one minute while turning the engine over with a ratchet at the 90 degree increments again. Additionally, I ran the drill and turned the engine over with a ratchet while running the drill at the same time and still have no oil to the drivers side.

It looks like we have run out of options and it is time to return to the engine builder.

Thanks for all your help.

John

Re: Hemi Oiling question [Re: az426john] #554390
12/16/09 03:13 PM
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Quote:

I put a timing tape on the harmonic balancer and turned the engine over in 90 degree increments starting at TDC. I ran the drill for 1 minute at each increment. I still had no oil to the drivers side rockers.

I pulled the rocker stand hold down bolt 2nd from the back, ran the drill for one minute while turning the engine over with a ratchet at the 90 degree increments again. Additionally, I ran the drill and turned the engine over with a ratchet while running the drill at the same time and still have no oil to the drivers side.

It looks like we have run out of options and it is time to return to the engine builder.

Thanks for all your help.

John


Last option,pull the head,spin the drill if still no oil,push a aluminum welding stick into the oil hole on the block,see if it reaches the cam(turn the engine and feel the rotation) if you don't feel it look to the cam bearing as the culprit. Also remove the two fittings at the back of the block(oil gage port)to insure that the crossover is not plugged.

Post deleted by Defbob [Re: B G Racing] #554391
12/16/09 04:56 PM
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Re: Hemi Oiling question #554392
12/29/09 06:08 PM
12/29/09 06:08 PM
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az426john Offline OP
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Hi Folks

I thought I would give you an update since you were all so helpful when I needed help.

We finally ran out of options after checking all we could reasonably do with the motor in the freshly painted and detailed engine bay.

We lubed the crap out of the drivers side rocker arm assembly and fired the motor. The result was oil started flowing to the drivers rocker arm assembly. The lifters must have been pumped up and primed from all the messing around with the motor because there was no lifter noise.

Ran the car for about 3 minutes and shot down due to leaky front carb. Cleaned up the mess and ran for another 5 minutes and shut down again to check for oil. Pulled the battery and rocker cover and there is presence of oil. Cleaned up the gas again and fired up for the cam break in run. The carb quit leaking and we completed the cam break in run with no problems.

In researching this I have found one other person who has experienced this issue and he did the same thing with the same results.

Thanks again for all your help.

John

Re: Hemi Oiling question [Re: az426john] #554393
12/29/09 06:56 PM
12/29/09 06:56 PM
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Have you determined why it didn't flow oil to the left rocker asembly while priming it yet? Did the eigine builder use white or some other grease to assemble the motor

Last edited by Cab_Burge; 12/29/09 06:56 PM.

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Post deleted by Defbob [Re: Cab_Burge] #554394
12/29/09 07:02 PM
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Re: Hemi Oiling question #554395
12/29/09 08:08 PM
12/29/09 08:08 PM
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First thing,is there enough oil to adquately lubercate the rockers? Is there something restricting the oil flow?What do you mean by the presence of oil(how much)?Did you make sure the shafts are installed correctly?

Re: Hemi Oiling question [Re: B G Racing] #554396
12/30/09 12:40 PM
12/30/09 12:40 PM
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az426john Offline OP
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We took the rocker assembly off the DS and
disassembled it. The only thing present was the Torco Engine assembly lube. He had used moly grease on other items like the cam gear - distributor/oil pump gear. We put the rocker arm assembly back together and lubed it up with GM EOS assembly lube. It is a little less "clinggy" than the Torco assembly lube.

There was a fair amount of oil present (puddled up) at the bottom of the head on the way to the drain holes and the inside of the rocker cover, spark plug tubes, valve gear etc. and the head surface was coated with oil.

I have run it again setting the idle mixture and idle speed with no problems. I plan to drive it today or tomorrow.

Re: Hemi Oiling question [Re: az426john] #554397
12/30/09 01:39 PM
12/30/09 01:39 PM
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I had the same problem but it ruined push rods,the builder put the shafts on upside down,there are oil hole and if there not lined up no oil,and the hemis have a hole drilled thru the cam and as it rotates it gets a squirt of oil to one side then the other.It wasnt enough oil to keep the push rods lubed(also had 900lb.springs on it)so I installed the oil line kit.it goes from cam journal to cylinder head(Ray Barton sells the kit)comes with S.S. lines and fittings.
That fixed all oiling problems for a hemi,it was 1650hp.in a 2100lb Daytona







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