Intake Leaking - pic
Thread Starter
Drifting
Joined: Feb 2005
Posts: 1,583
Likes: 5
From: Richardson Tx.
Intake Leaking - pic
I just replaced the intake as well as other items, finally started it up and it looks as though I have a leak at the rear of the intake.
Its not coming from the little oil pressure plug- it just happens to be wet too.
I would like to avoid having to remove the intake again if possible.
Can I just put some RTV on my finger and run it along that section of the intake (from the outside) and hope that it will seal any gaps?
Any other suggestions?
thanks
Its not coming from the little oil pressure plug- it just happens to be wet too.
I would like to avoid having to remove the intake again if possible.
Can I just put some RTV on my finger and run it along that section of the intake (from the outside) and hope that it will seal any gaps?
Any other suggestions?
thanks
Melting Slicks
Joined: Nov 2001
Posts: 2,668
Likes: 43
From: Eastern US XX
You can give it a try, but typically, once the oil gets on the surface to be sealed, the RTV will not stick until all the oil is removed - which you really cannot do unless you take it all apart again.
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
That's been my experience - worth a shot if you want to, but likely not.Do good clean-up with brake cleaner and use a good (Ultra Black-type) RTV.
Melting Slicks
Joined: Oct 2001
Posts: 2,062
Likes: 1,360
From: Halifax, Nova Scotia, Canada
I had a similar leak years ago, so I sealed it from the outside without removing the intake. It's been over 10 years and it hasn't leaked since.
I used a tooth brush and lots of brake clean and gave it a good scrubbing.
Applied about 1/8" thick layer to the leaking seam, with a good RTV.
I used a tooth brush and lots of brake clean and gave it a good scrubbing.
Applied about 1/8" thick layer to the leaking seam, with a good RTV.
Team Owner
Joined: Mar 2002
Posts: 24,160
Likes: 78
Another thing you can do is apply vacuum pressure (like literally with a shop-vac) to the carb to draw some of the sealant inward.
Racer
Joined: Feb 2010
Posts: 494
Likes: 0
From: Leominster MA
If you do pull the the intake, after scubbing with brake cleaner, use some fine sandpaper to clean that gasket surface completely. Also gives a good surface for the rtv to adhere to. Make sure you seal that pressure port also, just in case.
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Burning Brakes
Joined: Apr 2013
Posts: 1,194
Likes: 109
From: Las Vegas NV
I had a similar leak there and pretty much did what these guys are saying and that fixed it. Removed intake, cleaned the surfaces with brake cleaner, covered the lifter valley and ports and took to it with some sandpaper. Cleaned up again, let dry, sealed with RTV, all good since.
I learned the HARD WAY that the surface has to be absolutely clean.
I also learned the hard way that you can't substitute the intake manifold gasket with RTV. Use gaskets on the heads, use RTV on the block.
I learned the HARD WAY that the surface has to be absolutely clean.
I also learned the hard way that you can't substitute the intake manifold gasket with RTV. Use gaskets on the heads, use RTV on the block.
Drifting
Joined: Feb 2005
Posts: 1,879
Likes: 38
From: Los Gatos CA
In addition to the cleaning comments:
Make sure you drop the manifold carefully, as re-positioning can disturb the RTV and lead to leaks.
Oldsey intakes are the worst due to the wide block; I use studs in 2 diagonal corners to properly align the drop.
Make sure you drop the manifold carefully, as re-positioning can disturb the RTV and lead to leaks.
Oldsey intakes are the worst due to the wide block; I use studs in 2 diagonal corners to properly align the drop.
Le Mans Master
Joined: Oct 2010
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From: melbourne florida
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