Hi guys,
I just got some new repop exhaust manifolds from thornton ( w & z).
They say I don't need gaskets but can use them if I want.
I have the gaskets.....anyone use/not use gaskets with these and
does it leak ?

 

I've had better luck re-tightening bolts with lock washers than using gaskets - I've had gaskets blow-out.

 

The factory didn't use gaskets. If the repro manifolds are as flat on the mating flange as originals, there's no reason to use gaskets. On the other hand, the gaskets won't really hurt, either. It's just more scraping if you ever have to take the manifolds off.

 

I don't use gaskets either if the surfaces are nice. If you have gaskets now and you then don't use them, Make sure you get all the old gasket off before mounting them.

 

I have Thornton manifolds and I didn't use gaskets. No leaks, fit great.

 

I wood lay them down on a known flat surface and the evaluate the day light 4 yourself

buck50

 

SCE copper gaskets work great.

Cheap insurance.

 

I'm gonna put some coppers on my original manifolds. Heard they work really well, last forever and can be reused multiple times. We will c

 

Thanx for all the input guys.
I'm gonna try the copper gaskets..can't hurt,won't stick