I just had my 5.0 TPI rebuilt and my question is does the intake need to have sealant put on it plus the gaskets or do you just use the gaskets. I always had problems getting a good seal on the intake. and how about the exhaust manifolds do they gaskets or some kind of sealant or just install to bare metal. also, on the intake bolts. I bought new bolts and they came with a small amount of thread sealant, should i put a little bit more then whats on there now. thanks.

 

On the intake to block gaskets, I use a little silicon on both sides of the gasket around the water passages only.


No sealer on any of the runners and throttle body gaskets.


Ex. maniflods I have surfaced and use no gasket.


Intake bolts I use liquid teflon sealer.



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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

R.I.P. #3
My favorite quote about D.E. "He can see air"

 

engineboy, what type of teflon sealer you recommend on intake bolts and how much sealant do i put on the coolant passages. also, you said i have to resurface the exhaust manifolds.

 

I use Loctite PST sealant with teflon. (PT# 592) for the intake bolts.

On the passages, just a thin layer spread on with a finger to fill any imperfections.

You don't have to surface the ex. manifolds, I look at it this way, when you put a gasket in, you just opened yourself up to the possibility of having an ex. gasket blow at a later date.

If you surface the manifold and use no gasket, you don't have a problem.

I know a lot of people that use gaskets with no problem, I personally don't use them when using stock manifolds on small and big block chevys.

I do it this way because when I put an engine in, if the ex. leaks and it comes back, I fix it for free. I don't like working for free


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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

R.I.P. #3
My favorite quote about D.E. "He can see air"

 

on the intake use the side gaskets and put stuff around the intake ports and dont use gaskets in front or back just use 1" thick sealer!


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89 firebird formula


356 10.5:1compression
comp cams xe262 cam
performer rpm intake
#1405 edlebrock 600
434 casting completely redone with bronze guides and 202/160 valves 64cc chambers. decked .0005 thousandths
msd 6al
h.e.i. proform 50,000 volt vac. advance ditributor
700r-4 with 3.08 first gear and 3.23 posi 7 5/8 rear end.
b trans shift kit(will kill shifts...suck dong!!)
shorty heddman hedders with custom 3" pipe y-pipe back(no damn cat!) with 40 series flowmaster!

future mods: 406 roller REALLY REALLY REALLY RADICAL!!!!!

 

Good call ^^^^^^^

I forgot about the china wall.

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

R.I.P. #3
My favorite quote about D.E. "He can see air"