Supporting exhaust system from manifolds

[88mjblue]

I've got an SJ I'm installing a completely new exhaust system from manifolds back (y-pipe + cat + muffler + tailpipe).

There are two stock hangers to support the exhaust in the stock position located along the tailpipe (after the axle).

Should I be concerned that there's too much weight of the exhaust system hanging from the exhaust manifolds? Should I add an extra hanger somewhere?

[DirtyComanche]

Cast iron manifolds?  Probably be fine...

[gogmorgo]

My Niva's exhaust is supported at three points. Some zip-ties from the rear bumper supporting the glasspack, a hanger just before the rear axle, and then the manifold itself. But then it's only an 86" wheelbase.

Of it's cast iron manifolds, you're probably good. If it's a thin steel manifold like on the 4.0, you'll probably end up stress cracking it, the way every 4.0 eventually does.

[HOrnbrod]

Consider installing a flex joint as close as possible to the manifold and you will be fine.

 

[88mjblue]

Thanks guys, it's got stock cast iron manifolds, so it sounds like I'll be fine. Going to do the manifold gaskets too.

I'll check out that flex joint, maybe I'll have the shop do something like that for me when I have them weld in the bung hole for an O2 sensor.