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04-13-2004, 11:10 AM
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#1 |
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Future Owner
Join Date: Jul 2003
Location: Grand Forks AFB, ND
Posts: 151
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Anti-Freeze in Oil..Please Advise
Ok guys need some advice, posted this in the Engine forum but also wanted to post here as i usually get the most response...Built a 350 for my 71 c10....installed it, starts fine but it looks like im getting antifreeze in the oil...the oil on the dipstick has risen about a quart and the oil now has a greenish tint to it....the engine has only been ran for a total of about 20 minutes so far....im thinking possible bad seal on the head gasket or blown head gasket??? Where else does the oiling system and the coolant system cross paths were there could be some leakage into the oil???? Please shoot me some advice here..im going to drain the oil tommorrow and start with some fresh oil...
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Its not the end result that counts most...its the journey along the way that's most rewarding My truck doesn't leak, it just marks it's territory |
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04-13-2004, 11:26 AM
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#2 |
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Registered User
Join Date: Feb 2004
Location: Coral Springs,FL
Posts: 100
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It could be an intake gasket leaking, that would be alot easier than pulling the heads off. Wishfull thinking..good luck
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72 Chevy LWB leaf spring rear,SBC 385 Fast Burn,Art Carr built 700r4,3.73 Eaton posi,one piece windows,lowered 4/5.5, 60/40 seat, shaved turn signals,shaved reverse lights,shaved stake pockets, stainless steel 21gall in rear, c-notched, vintage air,ps,pb,currently doing body work. 68 Camaro conv.327,turbo 350,pb,disc brakes,built it for the wife 38 Chevy Coupe on the back burner LIFE IS GOOD! SMILE |
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04-13-2004, 11:39 AM
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#3 |
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Registered User
Join Date: Sep 2003
Location: Arizona
Posts: 44
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Possible causes:
Damaged head gasket Cracked head Cracked block (and with heavy duty engines) Leaking oil cooler Leaking cylinder inner seals Leaking injector seals (if you have them) If you haven't done so already, do a compression test. If you find some weak cylinders, do a wet test by squirting a little oil in the low cylinders. If there is no compression increase, particularly in two weak side by side cylinders, I'd be suspicious of my head gasket.
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'69 C-10 LWB, 350, TH350, posi-traction |
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04-13-2004, 02:31 PM
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#4 |
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Wiseass secured himself a BAN
Join Date: Nov 2000
Location: MOON!!!
Posts: 2,282
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Check your oil cooler.
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04-14-2004, 12:28 AM
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#5 |
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Senior Member
 Join Date: Mar 2003
Location: Colfax-California
Posts: 8,628
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I would lean towards the intake gasket myself if it is still green.
Gasket probably slipped down when you set the manifold. |
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04-14-2004, 12:40 AM
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#6 | |
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Bloo
Join Date: Feb 2001
Location: Barren County Kentucky
Posts: 6,283
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friend of mine had that problem with a 305 i traded him, he didnt torque down the heads
just an idea
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ASE Master Certified-GM Trained-Mechanic 1968 Chevy C30 157" WB Wrecker 1969 Chevy CST/10 SWB 1971 Chevy Custom/10 (first truck) 350, NV3500 5 speed 1971 Chevy K20 Custom Camper 4x4 350 TBI, SM465/NP205 1974 Chevy Custom Deluxe/10 1979 Chevy Custom Deluxe K10 farm truck beater 1989 Chevy K2500 Quote:
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04-14-2004, 01:33 AM
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#7 |
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Registered User
Join Date: Jan 2004
Location: Arizona
Posts: 157
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Intake gasket sounds most likely to me. What kind of heads are you running? Are they Vortecs?
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72 C10 Burb 350 700R4 70 C20 LWB 350 Crate TH400 68 Chevelle |
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