Exhaust pipe broken
 

Exhaust pipe broken

Started by hogi6123, November 04, 2021, 06:27:06 AM

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hogi6123

8v92t, I pulled over for the night, and in the morning my exhaust pipe is broken through completely between the engine and turbo.   Is this more serious than just no turbo, or can I still drive it?  What pressure is usually in there?
1981 MC-9

chessie4905

Is it on a straight section where you can install a band clamp for temp fix? If the flange on end of pipe where it attaches to the turbo has broken off, you can buy a stub flange and have it welded to pipe if in decent condition, or use a band clamp temporally. You don't  want to run it as is since exhaust temp off turbo is hot enough to cause a fire and permanently black stain everything in engine compartment.
GMC h8h 649#028 (4905)
Pennsylvania-central

hogi6123

It's right at the flange.  I'm at a rest area in the middle of Wyoming, I'm thinking of trying to tape or clamp something over it.
1981 MC-9

chessie4905

Is that cast iron on bottom? If not, you could remove v clamp and cut off flange from that pipe. Install band clamp. If cast iron, remove v clamp, remove broken flange, find a replacement stub, measure and cut enough off old pipe to fit. Reinstall v clamp and secure the two pieces with band clamp. For emergency repair, buy a muffler repair kit, wrap the bad joint according to instructions.
GMC h8h 649#028 (4905)
Pennsylvania-central

luvrbus

PC Industries in Afton Wy (1-877-885-4724) should have the pipe if you are close that the standard pipe for a top mounted turbo.Those are not your standard flanges you find in auto parts the bevel is different on Detroit's and when you find one they are about 50 bucks ea,the replacement will slide over the pipe then welded   
Life is short drink the good wine first

hogi6123

Thanks, Afton is too far.  I have clamps with me but it may take a while to dig them out.  I also have some aluminum sheets, that should fit the bill.
1981 MC-9

hogi6123

Temporary repair, helping reduce litter even. LOL
1981 MC-9

chessie4905

Is that an aluminum can or candy wrapper?
GMC h8h 649#028 (4905)
Pennsylvania-central

hogi6123

1981 MC-9

chessie4905

Beer cans work better after you empty them🤣

Here is a place that sells intake and exhaust parts if you have trouble locating parts for repair
https://www.truckpipesusa.com/
GMC h8h 649#028 (4905)
Pennsylvania-central

buswarrior

Lovely recovery!

I like soup cans over beer cans, a bit more substance to them...

Busnuts, this is why you carry all that debris around with you, it just may get you going...

Raw materials matter!

Happy coaching!
Buswarrior
Frozen North, Greater Toronto Area
new project: 1995 MCI 102D3, Cat 3176b, Eaton Autoshift

hogi6123

I needed the flexibility of the thin aluminum cans to seal over the lump of the flange.  They started to tear, so I put a second layer under each clamp.

No visible exhaust leaks on startup so we will be on our way and check on that repair later.
1981 MC-9

Tedsoldbus

Funny exchange AND educational. I'd still be there or hitchhiking to Afton....
1980 shorty (35') Prevost
6V92  HT 740
Lake Nottely Ga
Bus name "debt"
Education is important, but having a Bus is importanter...

luvrbus

Quote from: Tedsoldbus on November 04, 2021, 10:50:14 AM
Funny exchange AND educational. I'd still be there or hitchhiking to Afton....

He could still drive the bus he wasn't down,traffic behind him would be little up set with the black smoke though
Life is short drink the good wine first

hogi6123

The aluminum got blown out pretty quickly...

Air hose just above is melting.  Will try again with a slightly different method.

No black smoke behind though.
1981 MC-9