Author Topic: Oil is pooling on the intake  (Read 10807 times)

Offline TxFiddler

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Oil is pooling on the intake
« on: May 19, 2010, 03:11:13 pm »
In my 80 C10 with 350, what would cause oil to "pool" on the intake?  It's pooling right where on of the bolts from the a/c bracket bolts to it and also right where one of the intake manifold bolts are.  Here's a pic.  Thanks.
80 C10 2wd / 427 BigBlock / 700R4 / 3:42 Eaton Posi LSD / 770 cfm Holley Street Avenger / Doug's Headers / MSD ProBillet Distributor / Champion 3 row Radiator

Offline topp

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Re: Oil is pooling on the intake
« Reply #1 on: May 19, 2010, 03:37:37 pm »
Manifold gasket leak at that bolt.....
'90 Suburban TBI 350

Offline Layne

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Re: Oil is pooling on the intake
« Reply #2 on: May 19, 2010, 03:37:46 pm »
Rocker cover gasket possibly
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Offline TxFiddler

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Re: Oil is pooling on the intake
« Reply #3 on: May 19, 2010, 03:39:59 pm »
Can a quick fix be to pull the bolt and put some right stuff around it to temporarily seal or do i need to just pull the intake and re-seal the whole thing?
80 C10 2wd / 427 BigBlock / 700R4 / 3:42 Eaton Posi LSD / 770 cfm Holley Street Avenger / Doug's Headers / MSD ProBillet Distributor / Champion 3 row Radiator

Offline Irish_Alley

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Re: Oil is pooling on the intake
« Reply #4 on: May 19, 2010, 03:40:49 pm »
Rocker cover gasket possibly
I would do that first more likely
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline eventhorizon66

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Re: Oil is pooling on the intake
« Reply #5 on: May 19, 2010, 06:09:21 pm »
Those center four bolts (two on each side of carb) must have some sort of thread sealer on them.  Otherwise, you will get puddles.  Also check the VC gaskets as others have suggested (if they are old go ahead and replace them - it's easy).  I wouldn't mess with a intake gasket replacement unless you have evidence that it's bad.
'85 C10 SWB 350 700R4 TKO600

Offline VileZambonie

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Re: Oil is pooling on the intake
« Reply #6 on: May 19, 2010, 06:31:52 pm »
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Offline beastie_3

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Re: Oil is pooling on the intake
« Reply #7 on: May 19, 2010, 08:39:48 pm »
Could just drill a hole in the manifold to let the oil drain back in.......Just kidding.

You can wipe it all clean, drive it for awhile and then trace where the oil is coming from. How long did it take for it to puddle up that much?

Offline TxFiddler

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Re: Oil is pooling on the intake
« Reply #8 on: May 19, 2010, 10:30:16 pm »
Thanks a bunch everyone.  I did clean it off, put some right stuff on where the a/c bracket meets the manifold, then put some high temp thread locker on the 2 bolts that hold the a/c bracket on.  Haven't driven since.  Will post results tomorrow.  Thanks again, everyone.
80 C10 2wd / 427 BigBlock / 700R4 / 3:42 Eaton Posi LSD / 770 cfm Holley Street Avenger / Doug's Headers / MSD ProBillet Distributor / Champion 3 row Radiator

Offline eventhorizon66

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Re: Oil is pooling on the intake
« Reply #9 on: May 19, 2010, 11:26:05 pm »
It's not the ac bracket bolts that need the sealant.  It's the nearby manifold bolts.
'85 C10 SWB 350 700R4 TKO600

Offline Irish_Alley

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Re: Oil is pooling on the intake
« Reply #10 on: May 20, 2010, 06:17:54 am »
As many times as i v taken my intake off I never had it leak there just at the ends were your supposed to put that rubber gasket at.
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline bobcooter

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Re: Oil is pooling on the intake
« Reply #11 on: May 20, 2010, 09:09:42 pm »
I had one leaking like that, this is probably wrong, but I pulled it out, wrapped it with teflon tape and retightened it. No more leak.
'79 C-20, 350/400, 3:73 gears, 9 leafs and a headache rack
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Offline TxFiddler

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Re: Oil is pooling on the intake
« Reply #12 on: May 21, 2010, 09:47:40 am »
Well, after 2 days, no more pooling.  It must have been one of the bolts holding the a/c bracket.  I didn't mess with any of the intake bolts (hard to get to with carb on).  The tread locker and right stuff on the 2 bracket bolts seemed to have fixed the problem.  Thanks again for all the suggestions.  I will need help again, I'm sure.  Have a great weekend everybody.
80 C10 2wd / 427 BigBlock / 700R4 / 3:42 Eaton Posi LSD / 770 cfm Holley Street Avenger / Doug's Headers / MSD ProBillet Distributor / Champion 3 row Radiator