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Old 04-10-2011, 08:16 AM   #1 (permalink)
fc227 (fred)
1986 Grand National
 
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oil leak found (i think) on going problem for several years

Greetings all,

Over the past several years I have been fighting a very minor oil leak. After I long drive I would have a fine film over the bottom of the oil pan starting from the front and working its way back. Passenger side only.

I did the usual, snugged the oil pan bolts and valve covers. Clean the block real good with brake clean, Problem seem to go away for a while But after ~ 2 months it would show up again.

Turns out it was leaking where the intake meets the block & head. Only when the engine was pushed. The problem also went away while the breathers where clean. The oil was following the gap between the head and block and sweeped down the side of the block to the oil pan where it sweeped over the pan it self.

I just smear and packed in as best I could some RTV and let it dry over night before I will restart the engine. If that does stop it I will have to pull the intake. I really do not want to do that butů
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God Speed, Fred Carrado Jr.
"fredrickcarrado@comcast.net"
"http://home.comcast.net/~fredrickcarrado/site/"
1986 Buick Grand National
TE-44 turbo, Stretch inter cooler and a 1/2,
Ported heads, ATR 2 1/2" down pipe,
Commander & TT chip(s).
009 injectors, adjustable fuel pressure regulator, walboro 307 pump.
ET 12.08 - 111.07 MPH

Philippians 4:4-7
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Old 04-10-2011, 08:45 AM   #2 (permalink)
Shawdaddy
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You ever had the intake off? If the cork gaskets were used on front and back, get rid of them and use a nice thick bead of RTV black and won't leak again
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Old 04-10-2011, 09:26 AM   #3 (permalink)
fc227 (fred)
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No, I have pulled intakes several times. These are the neoprene gaskets. They are not leaking from there , I probably did not but enough rtv in the corners when I assembled it last time. that is where the minor leak is occurring.
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God Speed, Fred Carrado Jr.
"fredrickcarrado@comcast.net"
"http://home.comcast.net/~fredrickcarrado/site/"
1986 Buick Grand National
TE-44 turbo, Stretch inter cooler and a 1/2,
Ported heads, ATR 2 1/2" down pipe,
Commander & TT chip(s).
009 injectors, adjustable fuel pressure regulator, walboro 307 pump.
ET 12.08 - 111.07 MPH

Philippians 4:4-7
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Old 04-12-2011, 08:56 AM   #4 (permalink)
c77owen
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Quote:
Originally Posted by fc227 (fred) View Post
No, I have pulled intakes several times. These are the neoprene gaskets. They are not leaking from there , I probably did not but enough rtv in the corners when I assembled it last time. that is where the minor leak is occurring.
I never bother with even the neoprene end gaskets. Under pressure and oil they get slick and push out and even if you put a decent amount of silicone at the corners, if the seal moves or expands and contracts under pressure the corners will leak
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Old 04-12-2011, 07:58 PM   #5 (permalink)
85Hotairalky
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Just pulled my motor out and found the same issue,both end,funny thing is I have done over a hundred sbc/bbc and never had this issue,I am pulling it off and replacing the intake gaskets,and ends with silicone,is the felpro on piece intake gasket reusable?
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Old 04-19-2011, 05:29 PM   #6 (permalink)
fc227 (fred)
1986 Grand National
 
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Quote:
Originally Posted by 85Hotairalky View Post
Just pulled my motor out and found the same issue,both end,funny thing is I have done over a hundred sbc/bbc and never had this issue,I am pulling it off and replacing the intake gaskets,and ends with silicone,is the felpro on piece intake gasket reusable?

No, if you look close you will see raised "seams or beads" these get crushed when it is installed.

Plus there not that expensive.

That's my opinion.
__________________
God Speed, Fred Carrado Jr.
"fredrickcarrado@comcast.net"
"http://home.comcast.net/~fredrickcarrado/site/"
1986 Buick Grand National
TE-44 turbo, Stretch inter cooler and a 1/2,
Ported heads, ATR 2 1/2" down pipe,
Commander & TT chip(s).
009 injectors, adjustable fuel pressure regulator, walboro 307 pump.
ET 12.08 - 111.07 MPH

Philippians 4:4-7
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