Exhaust sealing?

[jusssi]

I took exhaust manifolds off and there wasn't gaskets at all. There were a bit leaks because was one broken bolt each side. Do I need gaskets? And I'll make new dp with v-band, does v-band need some seal ring?

 

[Icarus-54]

Re: Exhaust sealing?

use red rtv instead of gaskets

 

[Black Knight]

Re: Exhaust sealing?

x2, all I ever do and it's fine.

You might want to have the mating surfaces sanded down while your at it as well.

 

[0-60N4]

Re: Exhaust sealing?

I use the copper high temp RTV sealant for that.

 

[Throws]

Re: Exhaust sealing?

x2, all I ever do and it's fine.

You might want to have the mating surfaces sanded down while your at it as well.

This. Clean surfaces are teh important. Also, check the manifolds for cracks.

-P

 

[Syclone22]

Re: Exhaust sealing?

red rtv sealant does a great job on those
headers and crossover pipe leaks !!

 

[cloneman315]

Re: Exhaust sealing?

Gaskets,plus the silicone running out of all the cracks looks like crap.

 

[Syclone22]

Re: Exhaust sealing?

Gaskets,plus the silicone running out of all the cracks looks like crap.

Never mind the look it seals !!!!!!!! :tup:

 

[BoostedSUV]

Re: Exhaust sealing?

I've been running manifold gaskets for 6 years and I've never had one blow out or leak. They weren't there originally but I felt more comfortable running them. Never had an issue.

 

[MoJo]

Re: Exhaust sealing?

Part of a complete engine rebuild is placing a new face on the exhaust port sealing surfaces, on the heads and exhaust manifolds. Use new Gr. 8 bolts and exhaust bolt tab-locks or you will be re-torquing the bolts occasionally. I used new repro exhaust manifolds but still put a new face on them. New exhaust manifolds is not an option on turbo engines. Tubular header flanges must use some sort of composition gaskets with frequent re-tightening.

Locks, (French locks) for exhaust manifold bolts:
14081241 (package of 10), Three required, 1, 5, 2
14081242, (package of 1). One required, 6
Torque exhaust manifold bolts 25 lb. ft with anti-seize lube. No re-torquing required or possible .

NOTE: Should be used with spark plug heat shields. It will be difficult to remove the exhaust manifold bolts after the tab-locks are installed. ( Socket will not fit.)

 

[Syclone22]

Re: Exhaust sealing?

I am going to chime in her just for kicks. First Permatex does not recommend RTV on exhaust systems. Reason it can produce bad fumes. And some say it can start a fire. Just saying. Also certain RTV chemicals will destroy the O2 SENSOR in a few miles of driving. The manifolds should be installed with no Gaskets. They were designed that way and normally gaskets blow out. Just me could be wrong AGAIN

Note Permatex does make sensor safe RTV but it is not recommended for exhaust systems.

Also if 2 bolts are sheered off if it was me i would repair the bolts reason being nothing will seal a manifold with busted or missing bolts. The head and manifold surfaces should be flat clean and true to work properly. Especially on a turbo engine. But i would never let a car out the door with missing or busted manifold bolts.

O.K i agree RTV is not recommended for exhaust systems but the pro racers
use them on there exhaust systems !!
What about the copper spray for exhaust systems i use this product on
headgasket and exhaust systems it seals and goes up to 1250 F temps !!