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08-27-2022, 10:59 AM
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#1 |
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Registered User
Join Date: May 2022
Location: WA
Posts: 15
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Oil leaks
Replaced the intake manifold with an Edelbrock. 1972 C-10 with stock 350. Is this a gasket issue, a thread sealer issue or both?
Oil doesn’t appear on short drives, but freeway speeds for 30-40 minutes and there it is. |
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08-27-2022, 11:26 AM
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#2 |
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Registered User
Join Date: Jan 2007
Location: Puyallup, WA
Posts: 1,661
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Re: Oil leaks
You need thread sealer on those bolts...and the right torque.
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72 C10 lwb fleetside -stock 350/350 combo |
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08-27-2022, 12:13 PM
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#3 |
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Who Changed This?
 
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,109
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Re: Oil leaks
^ Yup.
That bolt is in a place where the head casting allows for oil return; even if it isn't at the lower edge of the head, oil still goes there, as it splashes all over. At high enough engine speeds, the valve cover may be close to full. It's why the Z-28s (for example) have a 9 quart pan.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA Last edited by Steeveedee; 08-27-2022 at 07:54 PM. Reason: Added info about oil capacity |
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08-27-2022, 04:40 PM
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#4 |
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Registered User
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,139
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Re: Oil leaks
Some of the bolts go into blind holes, some into the water jacket, some into the oil galley. A quality thread sealer will help out.
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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08-29-2022, 09:12 AM
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#5 |
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Registered User
Join Date: Jul 2015
Location: 2nd left past the stump on a dirt road.
Posts: 2,629
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Re: Oil leaks
From what I was informed of it also has to do with how the engine firing order is and and how well the pistons are sealing also.
I dunno, mine did that also before I sold it, ran fine for years. 
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08-29-2022, 11:16 AM
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#6 | |
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Who Changed This?
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,109
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Re: Oil leaks
Quote:
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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