Exhaust Hanger Broken

[Carl Froehlich]

This is a common problem and will come back. I replaced all these hangers with a solid piece of 3/8" aluminum rod. Never had the problem again.

Carl

[az_gila]

Originally Posted by Steve Melton

what about a washer between the hangar and bracket to give it more room to move?

I'm not sure if it's 'room to move' or a 'slight offset preload' on the "bulge" portion of the hangar.

If you look closely at the first picture it seems like there is mark on the horizontal tab radius where the vertical hanger may have been in contact. This could put a stress on the vertical hanger tab when the assembly is clamped into place.

The final installation of the assembly is on my schedule for today and I'll look further, but one solution my be an AN-970-3 washer as a spacer. I would think a large bearing area under the tab would be good.

The only two spots for this contact seem to be the lower ends of the vertical hangers. Have folks had breakages at the other four tab locations?

ADDED

The AN-970-3 washer worked well with a slight chop off one side to ensure it did not touch the edge of the flattened portion.

I had alignment/interference problems in other areas and will post in a new thread...

[Taildrgr]

Hi Gil,
Thanks for your input.

I have already put the new hanger on, but if it breaks again at that spot, I will definitely do something different. Perhaps a washer, but I like the idea of a 3/8 solid aluminum rod.

The exhaust moves mostly side to side as the engine runs, so I can see a fatigue failure is possible where it broke. Especially if the rubber cross piece rubs on the nose wheel mount.

[Pat Stewart]

Many years ago I saw an RV8 that had the tubes replaced with what looked like a good quality branded ground strap. Seemed like a good idea.

[scrollF4]

Originally Posted by turbo

I replaced all of my with pieces made out of solid steel. I flattened out the ends of the steel rod and now have a bullet proof system that will never brake.

Turbo,
Where do you get your steel tube for this?

[acroflyrgirl]

I had a rash of hangar breaks the past couple of years. Recently I put an extra strap on the lower side of my stacks, removed all the old Adel clamps and have been trouble freee ever since.

Some pix, keepin' it real.

[Vlad]

Does anybody have specs for the exhaust hanger hose handy? I need to replace a couple oily overstretched hoses.

[vluvelin]

Originally Posted by Vlad

Does anybody have specs for the exhaust hanger hose handy? I need to replace a couple oily overstretched hoses.

standard automotive fuel injection hose 3/8 id should work well

[Neal@F14]

Prestone power steering return hose part#PS0308 sold at Autozone, O'Reilly's, Advance Auto Parts, etc, works excellent. It's 3/8" ID, comes in a 2 foot package, and has thick walls and is super oil-resistant.

[s24789]

Ours broke too. A mechanic friend from work helped us make our last ones using two drill bits in a vise to make a radius on both sides at the crimp. No issues so far. We do carry a spare in our tool bag.