Re: blowing oil
[Re: dumbdog70]
#821900
10/04/10 09:40 PM
10/04/10 09:40 PM
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Joined: Apr 2005
Posts: 1,505
TN
SCATPACK 1
pro stock
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pro stock
Joined: Apr 2005
Posts: 1,505
TN
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My son had an 88 Corvette that would do the exact same thing. It turned out to be a broken piston. The KB pistons had a broken top ring land. Was allowing the compression to blow by under hard acceleration. Replaced the one bad piston and problem solved. Hope this is NOT your problem.
Old Geezer Racing
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Re: blowing oil
[Re: dumbdog70]
#821902
10/05/10 10:09 AM
10/05/10 10:09 AM
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Joined: Oct 2004
Posts: 8,165
Left Coast
BobR
master
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master
Joined: Oct 2004
Posts: 8,165
Left Coast
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Quote:
I have big block with stealth heads. works great except under hard acceleration it blows dipstick from tube. replaced pcv valve didnt help. put on breather set up with the hoses that run down to header collector. Still blows dipstick out. any ideas? Thanks
Rebuild the engine. Excessive blow-by means that something's wrong mechanically.
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Re: blowing oil
[Re: TheOtherDodge]
#821905
10/05/10 01:10 PM
10/05/10 01:10 PM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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Time for a leakdown / compression test.
Fastest 300
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Re: blowing oil
[Re: dumbdog70]
#821908
10/05/10 04:13 PM
10/05/10 04:13 PM
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Joined: Jan 2003
Posts: 13,385
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,385
Marion, South Carolina [><]
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Quote:
I have big block with stealth heads. works great except under hard acceleration it blows dipstick from tube. replaced pcv valve didnt help. put on breather set up with the hoses that run down to header collector. Still blows dipstick out. any ideas? Thanks
Need more info to figure out your problem. You're building too much crankcase pressure. Why it's doing this is what we need to figure out.
How big is this motor? Give us a run down of the combo. Low tension rings?
What kind of condition is the motor in? Fresh build? Or did it just start doing this?
You said you have a PCV valve, but how about other breathers on the valve covers? A picture of the motor might be better.
You tried the evac tubes going to the headers...do you run mufflers? If so, what kind are they and how big is the exhaust system?
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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