Outer Limits 4x4 Board

Just a thought

After breaking the back half off my exhaust today, and having a good look underneath I noticed that my system is a complete single piece system with no joins in it... When the tailpipe broke off the exhaust hangers, it seemed to be putting a lot of weight against the extractors (when hanging free)

So to my question, should I have a flex joint in the system (after extractors) to minimise any possible manifold damage (broken studs and whatnot)?

And it's for a GQ patrol wagon

sorry for rambling, but it's late and I'm in dire need of sleep

chops wrote:So to my question, should I have a flex joint in the system (after extractors) to minimise any possible manifold damage (broken studs and whatnot)?

yes you should have a flex pipe in there. I had great discussion with exhaust places cause the flex was around $75 more at the time as to if it was needed.

Otherwise the engine moves a lot with viabration on rubber mounts and your exhaust is rigid mounted, it will crack..

YMMV.

on my GQ diesel, u used to crack mufflers alot, i had a flex put it, but it was a short one, muffler laster alot longer, if you go a flex, get a long one, the one i had the flexable bit was 2" aim for one around the 4" mark. so much better

Cheap alternative for a flex joint is a piece of flexi truck exhaust pipe.
Get the stainless stuff as it is heaps flexier.
Just cut a section of pipe out near the front and slip on some SS flexi pipe with a couple of muffler clamps.
Paul.

if your exhaust is breaking you have PROBLEMS elsewhere..

First look would be your engine mounts, or previous engine mount problems which have bent all your piping.

Second look would be a poorly designed exhaust and hanger setup. a well designed exhaust does not need flexpipe, as it wont crack.

Jes