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09-16-2024, 08:36 AM
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#1 |
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Member
Join Date: Dec 2001
Location: Ontario Canada
Posts: 369
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sbc rear intake manifold oil leaks
whats the best to seal the intake ? I've been using red silicone for years , but the last two engines have leaked badly , I Even redid it and it still leaked, is the red silicone no good ?
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09-16-2024, 09:58 AM
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#2 | |
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Senior Member
Join Date: Jan 2024
Location: Charlotte, NC
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Re: sbc rear intake manifold oil leaks
Quote:
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Dawson Pauley #2827 N/SA 1980 Malibu SW 2S 305/180 #2827 S/ST 1978 Mazda RX7 w/ 383 sbc/glide |
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09-16-2024, 10:00 AM
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#3 |
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Senior Member
Join Date: Jan 2024
Location: Charlotte, NC
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Re: sbc rear intake manifold oil leaks
Well at least it doesn't leak out of the back of the manifold anymore. The engine leaks like a sieve, just not from there lol.
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Dawson Pauley #2827 N/SA 1980 Malibu SW 2S 305/180 #2827 S/ST 1978 Mazda RX7 w/ 383 sbc/glide |
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09-16-2024, 10:28 AM
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#4 |
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Senior Member
Join Date: Apr 2009
Location: Omaha, NE
Posts: 702
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Re: sbc rear intake manifold oil leaks
Ford TA-31 RTV silicone. Ive used it for years.
https://www.amazon.com/Genuine-Ford-TA-31-Silicone-Sealant |
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09-16-2024, 11:05 AM
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#5 |
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Member
Join Date: May 2011
Location: Auburndale,Florida
Posts: 220
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Re: sbc rear intake manifold oil leaks
G.M. 10-2006 engine sealant is good stuff also.
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09-16-2024, 11:50 AM
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#6 | |
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Member
Join Date: Oct 2020
Posts: 269
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Re: sbc rear intake manifold oil leaks
Quote:
I've been using the Permatex " Right Stuff " for a couple of years now. The engine in my Suburban I recently went over the valve adjustment and found a couple of wet area's on the valve cover gaskets - I cleaned and used the Right Stuff on them and that oil leak is solved. No more oil smell while sitting in traffic. I use that on all my small block and big block china walls - zero leaks. It dries quick enough while dyno testing as well. I also use the Permatex Grey silicone with great success as long as you have time for it to properly cure. Make sure the surfaces are CLEAN and OIL FREE. I found that to be very important in the curing process. I hope that helps. Respectfully, Henry Kunz 1534 H/SA |
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09-16-2024, 02:04 PM
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#7 |
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VIP Member
Join Date: Nov 2007
Location: New Jersey
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Re: sbc rear intake manifold oil leaks
Permatex Right Stuff!. I’ve never had an intake manifold, water pump, water neck leak on any engine using this stuff for decades and I’m convinced you could lift the engine from the intake manifold without any bolts in it.
Last edited by 1320racer; 09-16-2024 at 03:11 PM. |
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09-16-2024, 04:00 PM
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#8 |
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VIP Member
Join Date: Mar 2007
Posts: 2,444
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Re: sbc rear intake manifold oil leaks
permatex ultra gray here. Make sure its not the oil gauge fitting back there. There is no pressure on the back of the intake. Never had a leak there.
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Mike Pearson 2485 SS |
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09-17-2024, 07:22 AM
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#9 |
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Member
Join Date: Dec 2001
Location: Ontario Canada
Posts: 369
Likes: 125
Liked 7 Times in 5 Posts
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Re: sbc rear intake manifold oil leaks
thanks for the ideas , will take it apart and give it a try ,
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09-17-2024, 08:02 AM
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#10 |
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Member
Join Date: Aug 2010
Location: CT
Posts: 456
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Liked 346 Times in 150 Posts
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Re: sbc rear intake manifold oil leaks
Yup, use the Permatex "Right Stuff" and install the manifold with it wet, don't let it "skin" over. It won't leak.
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Phil Molski PMR Performance S/C 1623 |
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