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Discussion Starter #1
bought a car with this motor in it it has 40 lbs oil pressure all times but when idled up oil comes out the tube and all over the headers and driver side engine compartment.the engine has been modified but the guy i got it from knew very little about it.it has high rise intake angle port heads demon carb etc... please help me figure this thing out before i pull my hair out.................. lol
 

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oil coming out of dipstick tube 350 2 bolt main

what will cause oil to come out the dipstick tube? i just bought the car and dont know alot about it any help is apreciated
 

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Re: oil coming out of dipstick tube 350

Have ya got a P.C.V system from ya filler caps on both valve covers???
If not try taking the filler caps off/out and idle the car to see if the
oil problem is still there,
If so then a compression leak down test to see if theres excess compression
leaking into the sump and pressurizing it,If its a 'stroker" motor you can get
alot more turbulence stirred up by the rotating crank shaft,But if its bad
at idle it should be alot worse at full rev's
Its a start..
Gav
 

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Re: oil coming out of dipstick tube 350

no pvc system but did take the caps off both valve covers and oil still came out of the dipstick tube when reved up but when it idles it doesnt come out of the oil tube.
 

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Re: oil coming out of dipstick tube 350 2 bolt main

the oil level is on the mark on the dipstick, it only comes out when we idle the motor up. at a idle it does not come up the tube .
 

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Re: oil coming out of dipstick tube 350 2 bolt main

Overfull or a major blow-by issue can cause it. The top of the dipstick should have a rubber seal in it. Is the seal damaged?
 

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Re: oil coming out of dipstick tube 350 2 bolt main

Is the PVC valve working properly? Also try an oil Breather/Filler Cap, like the one bellow. if this doesn't help, then you might have a blow-by situation.
 

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Re: oil coming out of dipstick tube 350 2 bolt main

Sounds like the pcv system is not working..make sure your pcv is new or cleaned out or unclogged and the same with the breather filter on the other valve cover too..make sure the pcv hose is pulling vac when the car is running!..ALSO CHECK THE VC'S, IF THEY ARE AFTERMARKET SOMEBODY MIGHT HAVE THE BAFFLE CLOSED OFF ON THE UNDERSIDE OF THE VC(ANOTHER WORDS THE VENT IS NOT OPEN OR ABLE TO PULL)
 

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Re: oil coming out of dipstick tube 350

a.oil level correct?

b. dipstick may be wrong. I would drain the pan and put 5 quarts back in, check against mark on stick.
 

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Re: oil coming out of dipstick tube 350 2 bolt main

Your engine should not be blowing oil out of the dipstick tube. That is evidence of too much crankcase pressure. Typically, this is caused by a bad head gasket (cylinder head pressure leaking into the crankcase). Rule out the simple stuff first. Remove the PCV and shake it. Can you hear the ball bearing inside? If yes, put it back in, its likely fine. Do you have a breather? If yes and it doesn't look all crungy, its also probably fine. Then, do a compression test. A compression gauge is cheap and this is something you can do in the driveway with a helper to turn the key. Look for one cylinder much lower than the rest. If so, replace both head gaskets.
 

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Discussion Starter #12
Re: oil coming out of dipstick tube 350

oil level dead on mark but it does have a aftermarket stick i will try changing the oil and see
 

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Re: oil coming out of dipstick tube 350 2 bolt main

thanks guys i will try the suggestions tomorrow and will update then
 

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Re: oil coming out of dipstick tube 350 2 bolt main

I know this is an old thread, but did you ever figure out the problem, because my chevy 350 is doing the same thing?
 

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When was the last filter and oil change?
Easy to drain, and make sure its not over filled.
If it is not that try these common reasons for oil blow out
PVC is functioning? - Most common issue breather is clogged or valve is malfunctioning
Compression ok on all 8?
Rings are okay?
Guides okay?
These three seem to travel together....
Run each up to TDC and use 100 psi in the spark plug hole and listen for death rattle in heads or carb or exhaust.
 
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