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LT1-LT4 Modifications
1993-97 Gen II Small Block V8

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Old 05-27-2009, 01:25 PM   #1
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Default Intake Manifold Gasket Replace.

Im gonna do it Tomorrow any Tips?


I got the Felpro gasket kit.
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Old 05-27-2009, 01:58 PM   #2
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Did you get copper RTV? Wait until the RTV gels before you put the intake back on.
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Old 05-27-2009, 02:03 PM   #3
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Did you get copper RTV? Wait until the RTV gels before you put the intake back on.
It came with some Black RTV
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Old 05-27-2009, 04:09 PM   #4
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It came with some Black RTV
that tiny tube isnt enough. i was able to do one side with that little thing before i ran out. ended up wiping it off and got some copper RTV. You will also need a fuel line disconnect tool. You can leave the throttle body and fuel rails on the intake when you go to pull it off.
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Old 05-27-2009, 04:15 PM   #5
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hmmmm I believe you gotta pull the throttle body because you can get the front 2 bolts on the intake.. With the fel pro gasket set you a throttle body gasket
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Old 05-27-2009, 04:17 PM   #6
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Oh yeah and let the car sit for 24 hours after your are finished....and tighten the intake bolts to spec
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Old 05-27-2009, 04:20 PM   #7
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hmmmm I believe you gotta pull the throttle body because you can get the front 2 bolts on the intake.. With the fel pro gasket set you a throttle body gasket

nope, you can get those bolts out with the throttle body still on. You use a open end wrench on those 2. done it several times that way.
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Old 05-27-2009, 04:22 PM   #8
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Ahh ok... Yeah also the 5th bolt on the drivers side you will have to use a wrench on too its a pita to get a socket on there and get it out without rounding the head off. BLAH.lol if you were closer id come and help you since ive done it 5 times and can get the intake off in about 15-20 mins
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Old 05-27-2009, 04:24 PM   #9
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you will need...Fuel line disconnect tools
9/16 deep and shallow sockets
I think a 5/16 socket or a 1/4 socket
Pliars
torque wrench
air ratchet if possible
10mm socket for the 3 bolts holding the throttle bracket to the manifold
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Old 05-27-2009, 04:33 PM   #10
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You can just unbolt the fuel rail it easier and less of a mess instead of using the Fuel line disconnect tools..just my 0.2 cents
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Old 05-27-2009, 04:35 PM   #11
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Yes but if you pull the fuel rail you SHOULD install new seals and clean everything
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Old 05-27-2009, 05:41 PM   #12
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Make sure to retorque the manifold bolts after a weeks worth of driving. They will come loose and it is possible the manifold will leak.
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Yes but if you pull the fuel rail you SHOULD install new seals and clean everything
Injector seals? Nah. Not unless they are leaking/dry/cracked.
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Old 05-27-2009, 07:11 PM   #13
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Injector seals? Nah. Not unless they are leaking/dry/cracked.
Most of the time the intake manifold gasket set comes with the o-rings for the injectors. So i dont think it would hurt to replace them
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Old 05-27-2009, 10:44 PM   #14
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Just finished up mine last weekend. I pulled the fuel rail off the intake because I didn't have any fuel line disconnect tools handy. What I did was carefully laid the fuel rail with lines on top my radiator with an old blanket under it. I also pulled each o-ring off the injector to clean it and inspect it, also don't forget to clean the injector holes in the intake manifold very well before reassembling if you go this route.

Also be sure to clean all the old gasket/RTV off the heads, intake, and block without allowing the pieces to fall into the lifter area or head ports. I tucked some rags throughout the lifter valley to catch anything that might fall. Be sure to degrease all areas that are going to be sealing, I used brake cleaner sprayed onto a rag and carefully wiped the surfaces. Take your time, keep everything organized and clean all the parts well and you should not have any problems.
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Old 05-27-2009, 11:16 PM   #15
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why did they rtv block?why not put rubber gaskets like ford 302?
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Old 05-28-2009, 01:34 PM   #16
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just as someone said ^^^, CLEAN EVERYTHING!!!! Brake clean works best, i had to do my intake gaskets twice because i did not clean the back valley area where you put the RTV sealant, spewed oil like no ones business.
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Old 05-29-2009, 12:20 AM   #17
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I replaced the intake gasket twice before I got it right. First two times was with a moderate bead of the black rtv. Leaked out of the back corner. Third time I used a whole tube of the copper rtv. Never leaked after that.
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Old 05-29-2009, 01:16 AM   #18
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how do you know when to replace the gasket ?
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Old 05-29-2009, 07:08 AM   #19
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Quote:
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how do you know when to replace the gasket ?
When you get oil seeping out either end of the engine, where the intake manifold mates with the top of the block. Usually, it's at the back, because the heat of the EGR tube "cooks" the RTV, and it dries and shrinks, causing the leak.
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Old 05-29-2009, 09:41 AM   #20
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i did mine only because blown head gasket, car had 160,XXX miles and the only thing that killed was the spray...
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