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#1 |
Registered User
Join Date: Jun 2012
Location: Clearwater Beach Florida
Posts: 872
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Headgasket leaking?
I was having a small leak of oil running down at my starter nuts. Pulled starter and it appears a small leak running down from the head gasket. Is this typical at times? How hard on the difficulty scale? I've replaced a engine in a Mustang and have down numerous other bolt on stuff on cars. So I'm pretty handy. Looks like it would be pretty straight forward pulling carb, intake, exhaust and head. Would I do both gaskets since I'm in there? CHEVY 350 anything else to do while I'm in there? Or actually do I just try to tighten the head bolts? Just thought about that.
Thanks ![]() Last edited by 66clow; 08-14-2016 at 06:45 PM. |
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#2 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,721
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Re: Headgasket leaking?
No, it's not typically. Usually blown head gaskets are between cylinders and not externally.
Is that oil or water? There are no oil passages through the head gasket. If it's oil, most likely a valve cover leak or rear of the intake manifold and it is wicking into the joint between head and block. Check intake manifold, valve cover, and heater/cooling fittings for leaks first.
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#3 | |
Registered User
Join Date: Jun 2012
Location: Clearwater Beach Florida
Posts: 872
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Re: Headgasket leaking?
Quote:
Thanks |
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#4 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,628
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Re: Headgasket leaking?
Spray or sprinkle a little baby powder back there on the intake and the valve cover. Your oil leak will show up easily.
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#5 |
Registered User
Join Date: Oct 2008
Location: Marianna Arkansas
Posts: 7,270
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Re: Headgasket leaking?
A retorque isn't gonna help. Most likely it is the pan rail gasket is starting to fail. The last person to work on it may have used the rail end gaskets[don't do that] or didn't put the needed daubs on the ends to stop the chance of a leak. Sounds like the intake may have to come off to fix the leak.
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#6 |
Registered User
Join Date: May 2016
Location: Henderson NC
Posts: 975
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Re: Headgasket leaking?
Make sure you know where it's coming from before you do anything. Don't just assume it's not this so it must be that. The valve covers are known for leaking on these motors.
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#7 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,721
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Re: Headgasket leaking?
THe leak has to be from the top. The oil pan is WAY below the joint between the head and the block.
Valve covers are easiest but the intake rear seal is just as likely. If you used the rubber end seals on the intake and it is leaking, get a new gasket set and tube of Permatex. Throw end seals in trash. Re-do intake using Permatex on the ends of the block.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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#8 |
Registered User
Join Date: Jun 2012
Location: Clearwater Beach Florida
Posts: 872
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Re: Headgasket leaking?
Put my phone behind the intake and took a photo. Appears it is my intake seal. Fingers were wet also when I reached back there. No sealant must of been put back there on the corners.
Thanks for the pointers. ![]() |
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