Intake leak
Thread Starter
Intermediate
Joined: Feb 2009
Posts: 41
Likes: 0
From: Bartlesville Oklahoma
Intake leak
I'm about to pull my hair out. I'm running a small block with a 671 blower and can't seem to get the rear intake to seal. I tried the cork gasket first, blew it out, next I used red atv, and blew it out. It doesn't have any blowby so I assume its not a crankcase pressure problem. I'm getting tired of pulling the blower and intake any help would be apperciated.
Pro
Joined: Jul 2008
Posts: 699
Likes: 3
From: Millersville, MD
I'm about to pull my hair out. I'm running a small block with a 671 blower and can't seem to get the rear intake to seal. I tried the cork gasket first, blew it out, next I used red atv, and blew it out. It doesn't have any blowby so I assume its not a crankcase pressure problem. I'm getting tired of pulling the blower and intake any help would be apperciated.
Le Mans Master
Joined: Nov 2008
Posts: 5,691
Likes: 12
From: columbus oh
I'm about to pull my hair out. I'm running a small block with a 671 blower and can't seem to get the rear intake to seal. I tried the cork gasket first, blew it out, next I used red atv, and blew it out. It doesn't have any blowby so I assume its not a crankcase pressure problem. I'm getting tired of pulling the blower and intake any help would be apperciated.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,114
From: Crossville TN
Remove all intake gaskets/sealant, then place the 'bare' intake manifold on the block and use shim gauge to see how much clearance you have at all joints where gaskets/sealant is to be used. As mentioned above, you probably have too much clearance at one or more joints. If so, you need to use a 'hard' gasket filler to take up most of that gap and thin layer of sealant to make the joint seal. Don't forget to calculate in how much compression you will get with the gaskets and bolt torque that you will be using.An alternative approach is to install just the cork 'side' gaskets, but no gaskets/sealant at the ends; then bolt up the intake with full bolt torque. Then measure the clearance at the ends with the shim gauge. Select the gasket thickness for the end pieces so that [under compression] all gasketing will be tight.
Thread Starter
Intermediate
Joined: Feb 2009
Posts: 41
Likes: 0
From: Bartlesville Oklahoma
After pulling the intake and dry fitting I discovered the gap was too wide so I did as you suggested using a hard gasket filler and then a silicone seal and it seems to be working fine. Thanks for the help. You guys are great.
