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Engine Pressure Blowing Oil #1048094
08/06/11 10:55 AM
08/06/11 10:55 AM
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dumbdog70 Offline OP
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Have a 440 stroker with stealth heads roller cam. Had it to drags last night after first pass came back to pits. Dipstick was blown halfway out of tube, oil was coming out of breather and pcv valve, also valley pan was ballooned up to where it was touching the bottom of the intake. Car has 1 push in breather and a pcv valve. Does it need another breather? any ideas? Thanks

Re: Engine Pressure Blowing Oil [Re: dumbdog70] #1048095
08/06/11 10:59 AM
08/06/11 10:59 AM
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Salt Lake City
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camastomcat Offline
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Too much oil, tired motor, broken ring, wrong location of breather? Is it a new build? New pan? Does it smoke? Need more info.

Re: Engine Pressure Blowing Oil [Re: dumbdog70] #1048096
08/06/11 11:02 AM
08/06/11 11:02 AM
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Romeo MI
MR_P_BODY Offline
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Sounds like you have some serious pressure in there...
do a leak down

Re: Engine Pressure Blowing Oil [Re: MR_P_BODY] #1048097
08/06/11 11:09 AM
08/06/11 11:09 AM
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dumbdog70 Offline OP
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It is a new build. New pan new everything. Doesnt smoke. Engine runs great never had an issue driving on street. Even with a highway high speed runs. Breather is in the location provided on valve cover. toward front of engine pass side. Pcv rear driver side

Re: Engine Pressure Blowing Oil [Re: dumbdog70] #1048098
08/06/11 11:09 AM
08/06/11 11:09 AM
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Crizila Offline
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Make sure the breather is open - not pushed in against the oil baffle, etc. If there are no breather restrictions, it's time for a leak down test. At idle, if the PCV valve is working properly and you have good ring seal, you should actually have a negative pressure in the crankcase.


Fastest 300
Re: Engine Pressure Blowing Oil [Re: dumbdog70] #1048099
08/06/11 11:12 AM
08/06/11 11:12 AM
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dumbdog70 Offline OP
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Ill do a leak down test. oil level is good. Not to much oil at least according to the markings on the dipstick

Re: Engine Pressure Blowing Oil [Re: dumbdog70] #1048100
08/06/11 11:13 AM
08/06/11 11:13 AM
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tboomer Offline
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What do you have for an oil pan? Is it possible that you have too much oil in it?


The end is near.....
Re: Engine Pressure Blowing Oil [Re: tboomer] #1048101
08/06/11 11:17 AM
08/06/11 11:17 AM
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dumbdog70 Offline OP
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It is a 7 quart pan i dont know the manufacturer. MP chrome dipstick
filled to what i think is the appropriate level.

Re: Engine Pressure Blowing Oil [Re: dumbdog70] #1048102
08/06/11 11:24 AM
08/06/11 11:24 AM
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tboomer Offline
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The reason I ask is that I have a Moroso 7 quart pan on mine..If I went with the full 7 quarts it would blow oil. Started using 6 1/2 quarts and the smoke problem went away...Go figure!!


The end is near.....
Re: Engine Pressure Blowing Oil [Re: dumbdog70] #1048103
08/06/11 12:05 PM
08/06/11 12:05 PM
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Florida STAYcation
dIc dOc Deity ! Offline
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Quote:

Have a 440 stroker with stealth heads roller cam. Had it to drags last night after first pass came back to pits. Dipstick was blown halfway out of tube, oil was coming out of breather and pcv valve, also valley pan was ballooned up to where it was touching the bottom of the intake. Car has 1 push in breather and a pcv valve. Does it need another breather? any ideas? Thanks




The last motor I saw like this had some serious probs ... like a dime-sized hole in one of the pistons.

As suggested before .... do a leak-down test or AT LEAST a compression check. To blow-up a valley pan like that requires some BIG TIME blow-by.

Re: Engine Pressure Blowing Oil [Re: dumbdog70] #1048104
08/06/11 01:53 PM
08/06/11 01:53 PM
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Bend,OR USA
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Cab_Burge Offline
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Quote:

It is a 7 quart pan i dont know the manufacturer. MP chrome dipstick
filled to what i think is the appropriate level.


How many quarts did it take to get it to the appropriate level?I had one motor that was ina used car that the owner had used a mix bag of parts, oil pan, oil pan pickup and Mopar chrome dipstick tube and dipstick. the dipstick said is was full when it had 2.5 quarts in the pan when I drained it and measured it, after it spun a rod bearing I now calibrate all the dipsticks on my new or used motors by measuring the quarts used compared to the dipstick readings


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Engine Pressure Blowing Oil [Re: Cab_Burge] #1048105
08/06/11 02:55 PM
08/06/11 02:55 PM
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Dandridge TN
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Dabee Offline
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Quote:

I now calibrate all the dipsticks on my new or used motors by measuring the quarts used compared to the dipstick readings




Dipsticks are like people, no two dipsticks are alike. Calibrate it.

Re: Engine Pressure Blowing Oil [Re: Dabee] #1048106
08/06/11 03:01 PM
08/06/11 03:01 PM
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Lehigh Acres, Florida
rickstershemi Offline
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Quote:

Quote:

I now calibrate all the dipsticks on my new or used motors by measuring the quarts used compared to the dipstick readings




Dipsticks are like people, no two dipsticks are alike. Calibrate it.




Same here....the 408 with 8qt Moroso pan showed a quart low on the new stick I just installed....going to cut .5" off the tube

Rickster

Re: Engine Pressure Blowing Oil [Re: dumbdog70] #1048107
08/06/11 04:15 PM
08/06/11 04:15 PM
Joined: Sep 2005
Posts: 1,328
St. Louis, MO
mopardamo Offline
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Hello,

I had some similar problems on a car with a full exhaust. The tubing was not welded to the end of the reducer. The tubing was inserted past the reducer end over an inch. This caused a bunch of back pressure that only showed up for me at the track. Intake leaks, dipstick pushed up, ballooned up pan, leaks etc. This was a fresh motor also. Do you have a full exhaust?

Damon

Re: Engine Pressure Blowing Oil [Re: mopardamo] #1048108
08/06/11 04:19 PM
08/06/11 04:19 PM
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Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Quote:

Hello,

I had some similar problems on a car with a full exhaust. The tubing was not welded to the end of the reducer. The tubing was inserted past the reducer end over an inch. This caused a bunch of back pressure that only showed up for me at the track. Intake leaks, dipstick pushed up, ballooned up pan, leaks etc. This was a fresh motor also. Do you have a full exhaust?

Damon




What are you referring to when you say tubing

Re: Engine Pressure Blowing Oil [Re: mopardamo] #1048109
08/06/11 05:06 PM
08/06/11 05:06 PM
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dumbdog70 Offline OP
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I do have full exhaust. 3 inch flowmasters exit out the rear. Buddy is having similar issues. Really the only common thing between engines are the stealth heads. I did notice that on those heads where the push rods go thru them there is just a hole for the pushrod they are not"open" like a cast iron head. Dont know that that makes any difference just an observation. Im going to change the oil noting the amount and do the leak down test. I did pull the breather and pcv valve they are extremely close to the baffle in the valve cover about 1/8 inch

Re: Engine Pressure Blowing Oil [Re: dumbdog70] #1048110
08/06/11 05:16 PM
08/06/11 05:16 PM
Joined: Jun 2003
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Romeo MI
MR_P_BODY Offline
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Quote:

I do have full exhaust. 3 inch flowmasters exit out the rear. Buddy is having similar issues. Really the only common thing between engines are the stealth heads. I did notice that on those heads where the push rods go thru them there is just a hole for the pushrod they are not"open" like a cast iron head. Dont know that that makes any difference just an observation. Im going to change the oil noting the amount and do the leak down test. I did pull the breather and pcv valve they are extremely close to the baffle in the valve cover about 1/8 inch




ABOUT a 1/8" is getting close... if its closer than
that it could build pressure... are you running a
E-vac system with a full exhaust

Re: Engine Pressure Blowing Oil [Re: dumbdog70] #1048111
08/06/11 06:50 PM
08/06/11 06:50 PM
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Az
Crizila Offline
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Crizila  Offline
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Quote:

I do have full exhaust. 3 inch flowmasters exit out the rear. Buddy is having similar issues. Really the only common thing between engines are the stealth heads. I did notice that on those heads where the push rods go thru them there is just a hole for the pushrod they are not"open" like a cast iron head. Dont know that that makes any difference just an observation. Im going to change the oil noting the amount and do the leak down test. I did pull the breather and pcv valve they are extremely close to the baffle in the valve cover about 1/8 inch


1/8" is gonna be to close, especially when things are oil soaked. Could be a combo of things, including over filled. Any kind of aftermarker pan requires remarking your dip stick for the amount of oil you want to use. Don't believe the exhaust or pushrod holes are your problem.


Fastest 300
Re: Engine Pressure Blowing Oil [Re: MR_P_BODY] #1048112
08/06/11 06:54 PM
08/06/11 06:54 PM
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dumbdog70 Offline OP
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No no e vac system. should I get one?

Re: Engine Pressure Blowing Oil [Re: dumbdog70] #1048113
08/06/11 07:24 PM
08/06/11 07:24 PM
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Romeo MI
MR_P_BODY Offline
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Quote:

No no e vac system. should I get one?




No... not with a full exhaust... a E-vac will pull a
max of 5"hg and with a exhaust for every inch of back
pressure you reduce the effectiveness by that same amount
so if the exhaust is greater than 5"hg it will pressurize
the crank case

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