Onan exhaust hangers don’t last

ezgoin wrote:

dougrainer wrote:
Hangers usually FAIL because they are NOT installed correctly. If, when you install you are putting a load on the hanger, the Rubber will fail. AFTERMARKET Hangers (Auto supply stores) are much better grade. Sometimes, you may need 2 depending on how long the Tail Pipe is. Doug

Isn’t the intent of the hangers to support the weight of the genny exhaust? I currently have 2 completely broken, with another one attached near the engine exhaust that is ready to break.

Bill

Watch the genny when it operates. Just like the main engine, it bounces around quite a bit. You need to have the flexible mounts on the exhaust system absorb that flex while supporting the weight. Then there's the expansion/contraction due to the thermal cycles too.

Chum lee

dougrainer wrote:
Hangers usually FAIL because they are NOT installed correctly. If, when you install you are putting a load on the hanger, the Rubber will fail. AFTERMARKET Hangers (Auto supply stores) are much better grade. Sometimes, you may need 2 depending on how long the Tail Pipe is. Doug

Isn’t the intent of the hangers to support the weight of the genny exhaust? I currently have 2 completely broken, with another one attached near the engine exhaust that is ready to break.

Bill

ford truck guy wrote:

Chum lee wrote:

MountainAir05 wrote:
My first one last about 5 years. The replacement came from a auto parts store and its been on there 15 years. It looks like maybe a tire type laminated material. Without some flex you going to get breakage on metal to metal connectors.

Yes! There are better grades of reinforced rubber. I just found a failed tire (blowout) and cut the appropriate sized rubber strip out of the sidewall. You need a sharp knife to do that. Drilled out the rivet and drilled two holes in the rubber strip and replaced it with an appropriate sized bolt and nut Problem solved for free. It's been fine now for 7 years.

Chum lee

I like that idea Chum Lee.. easy and effective

Thank you. It's my lifes work.

Mine broke last year, I replaced it with something that looked close enough that I found at the local auto parts store.

In my case, the end of the Onan exhaust pipe went through a metal hoop that was screwed onto the bottom of the motorhome. When the support broke, the pipe sprung a bit was now firmly pressed against the hoop. Obviously the rubber support had been under a lot of stress for many years. I removed the hoop, let the pipe self settle where it wanted to be naturally, then mounted the new hanger in a stress free manner. I don't expect it to ever break again.

Hangers usually FAIL because they are NOT installed correctly. Exhaust hangers just support the tail Pipe. If, when you install you are putting a load on the hanger, the Rubber will fail. AFTERMARKET Hangers (Auto supply stores) are much better grade. Sometimes, you may need 2 depending on how long the Tail Pipe is. Doug

Chum lee wrote:

MountainAir05 wrote:
My first one last about 5 years. The replacement came from a auto parts store and its been on there 15 years. It looks like maybe a tire type laminated material. Without some flex you going to get breakage on metal to metal connectors.

Yes! There are better grades of reinforced rubber. I just found a failed tire (blowout) and cut the appropriate sized rubber strip out of the sidewall. You need a sharp knife to do that. Drilled out the rivet and drilled two holes in the rubber strip and replaced it with an appropriate sized bolt and nut Problem solved for free. It's been fine now for 7 years.

Chum lee

I like that idea Chum Lee.. easy and effective

MountainAir05 wrote:
My first one last about 5 years. The replacement came from a auto parts store and its been on there 15 years. It looks like maybe a tire type laminated material. Without some flex you going to get breakage on metal to metal connectors.

Yes! There are better grades of reinforced rubber. I just found a failed tire (blowout) and cut the appropriate sized rubber strip out of the sidewall. You need a sharp knife to do that. Drilled out the rivet and drilled two holes in the rubber strip and replaced it with an appropriate sized bolt and nut Problem solved for free. It's been fine now for 7 years.

Chum lee

Just happened to me a couple of days ago. Driving along and suddenly heard a dragging noise. Pulled over, and the onan exhaust was dragging. It is just in front of the front wheel so I am lucky it did not get run over. That would have been a mess!! Tied it up using plumbing strap I always carry. Will replace later with proper hanger.

Mine broke often till I just grabbed an 18" piece of Number 12 electric wire, Yellow with all three wires.

Wrapped in place and has been there for years - noticed just the other day when looking to change the oil.

Still Going Strong.

Pick up a broken truck mudflap from the side of the road and cut your own fiber piece to replace the broken one. Most of the black flaps have fibers embedded n them. Will last a long time. I've used them on the coach hangers and work great. Good lick Don