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Author
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Topic: Intake gasket sealing problems
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Mpcoluv
Gearhead Posts: 945
From: Charlotte NC usa
Registered: Apr 2001
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posted 11-03-2002 04:00 PM
   
I keep having intake gasket sealing problems with my cleveland. It appears that after 9 monmths or so, the seal is lost on cylinders # 7 and 8.
Any tips or hints as to resolving the problem?
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Moneymaker
Administrator Posts: 19704
From: Lyons, IL, USA
Registered: May 99
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posted 11-03-2002 04:06 PM
Are you using a bath tub gasket?
Are you using end rail gaskets? They may be keeping the intake from seating proporly.
Whenever I have a problem with a 351C intake fit, I cut the bath tub intake ends off and use the Mr. Gasket intake gaskets in conjunction with the valley pan. NO more problems that way.  ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
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Mpcoluv
Gearhead Posts: 945
From: Charlotte NC usa
Registered: Apr 2001
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posted 11-03-2002 04:48 PM
I am using Mr gasket intake gaskets and silocone bead end seals.
Maybe it's operator error, or something isn't square....
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kid vishus
Gearhead Posts: 4538
From: middle of NC
Registered: Oct 2000
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posted 11-04-2002 08:58 AM
I've always had the best luck with FelPro intake gaskets. Not the tub type, but the good 4 piece. I also use the end seals. If the gap at the end of the intake is too much, I put the end seal down,then a bead permatex on top of it, set the intake on, and take what squezes out, and smear it over the edge of the intake and the cork end seal. It's not the prettiest thing in the world, but it doesnt leak.
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Mpcoluv
Gearhead Posts: 945
From: Charlotte NC usa
Registered: Apr 2001
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posted 11-07-2002 10:46 AM
I make have the intake over torqued a little.
Will that cause leakage problems?
Kid, what do you torque your intake to?
Also has anyone used RTV only for intake gaskets?
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kid vishus
Gearhead Posts: 4538
From: middle of NC
Registered: Oct 2000
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posted 11-07-2002 10:56 AM
quote:
Originally posted by Mpcoluv:
Kid, what do you torque your intake to?
Ummm....  till it feels right?!?! Truthfully, I have never torqued an intake down. I use a 3/8" drive ratchet and tighten it down till it feels "tight enough". I'm just luck I guess that I have never had one leak.
I "glue" the gaskets to the head, let that set up first, then put the intake on the motor without any permatex between the gasket and the intake. I tighten it down snug, let it set for at least an hour if it's hot outside, longer if it's not real warm, then tighten it down some more before firing it the first time. After it's been run awhile, I go back and tighten them up some more. It's not very scientific, nor the right way of doing it, but it's the way I have always done it and it seems to work for me.
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clevelandstyle
Gearhead Posts: 638
From: Connersville, IN
Registered: Jul 2001
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posted 11-07-2002 12:01 PM
I use RTV. It works well for me. Put a very thin layer on the head and let it set up. If you don't let it set up, it will squish out when you tighten the intake.------------------
Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 351C 4V
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jsracingbbf
Gearhead Posts: 1677
From: Batesville,MS. , U.S.A.
Registered: Mar 2002
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posted 11-08-2002 12:03 AM
Back when I ran 351c's I threw the end rail gaskets out the window on the way back from the parts store. I used RTV and I didn't let it set up completely. I let it sit and form a "skin" on the surface. Yes some of it squished out but not much. It usually took two beads. I used either FEL-PRO or VICTOR Nitro seal gaskets. I used a little THIN bit of RTV from the gasket to the head, just to hold the gasket in place. No valley pan OR I trimmed the valley pan to fit UP TO the gaskets. I then stabbed the intake dry, like Kid said. I never torqued mine either. I didn't over torque it however. From time to time I just checked the bolts to see if they were still tight. I've never had a vacuum leak from a intake. I've helped several chevy guys chase a vacuum leak though. 
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Jerry Smith
69 Mustang Pro ET Drag
70 Mustang retired former footbrake car
Murphy's Law: "Any tool dropped while working on a car will always fall to a spot where it is least likely to be retrieved with sucess."
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