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05-20-2022, 02:29 PM
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#1
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Senior Member
Join Date: Jul 2015
Location: Manning, South Carolina
Posts: 1,884
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Hot Exhaust On Differential
For anyone that has not seen my current thread on the driveshaft issue, we hit some road debris that tore off the exhaust tailpipe and did major damage to the drive shaft. After 4 days the driveshaft has been replaced and we drove over 200 miles today and so far, no issues. However, the tailpipe is still gone since the repair shop does not do exhaust work. We still have another 600 miles to go and no place to fix the exhaust so we need to drive it without the tailpipe. With the tailpipe gone the exhaust is pointing at the differential about 3 feet in front of it. So I'm wondering if there might be a problem with hot exhaust blowing at the differential even at 3 feet away? For those that might be concerned, there is no exhaust coming in the coach. Chuck
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1999 Fleetwood Bounder 34J
Triton V10 Gas
2010 Chevy HHR Panel
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05-20-2022, 02:49 PM
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#2
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,982
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That might result in shortened diff. oil life, I would replace it after the exh. tail-pipe is replaced. Can you add a down-turned tailpipe end onto the muffler?
Some towns have specialty muffler shops, try to locate one and have a new tail-pipe made to fit.
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2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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05-20-2022, 03:35 PM
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#3
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Senior Member
Join Date: Jul 2005
Posts: 5,996
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Don't you have an IR temperature reader on board? If not, get one at Tractor supply and shoot the axles on either side of the punkin. If no great difference, no problem. Axles don't have oil coolers. I'd be more worried about hot brake fluid as the lines are often mounted on the axle. Get a heat gun reader.
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TandW
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05-20-2022, 04:02 PM
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#4
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Senior Member
Join Date: Aug 2021
Location: Maine
Posts: 331
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A lot of hot rod cars run without tailpipes. I have run my hot rod Impala with the mufflers pointing at the rear end for almost 20 years now. It's a convertible so I only get gassed if I put the top up, which is almost never. I wouldn't stress over it too much and just fix it when you get a good chance.
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1986 Itasca Sunflyer 22 ft P32 chassis with 454 engine
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05-20-2022, 04:07 PM
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#5
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Senior Member
Join Date: Jul 2015
Location: Manning, South Carolina
Posts: 1,884
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This does sit forward of the differential by at least 3 feet so it's not like it is right against it. I would think that the airflow would reduce the temp on the differential housing somewhat. I do plan to replace the tailpipe but not until we get back home to Florida. So that will means driving it about 1200 miles like this. Differential fluid will get changed when we get back too. Chuck
__________________
1999 Fleetwood Bounder 34J
Triton V10 Gas
2010 Chevy HHR Panel
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05-20-2022, 04:09 PM
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#6
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Senior Member
Join Date: Jul 2015
Location: Manning, South Carolina
Posts: 1,884
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Quote:
Originally Posted by cadillac_al
A lot of hot rod cars run without tailpipes. I have run my hot rod Impala with the mufflers pointing at the rear end for almost 20 years now. It's a convertible so I only get gassed if I put the top up, which is almost never. I wouldn't stress over it too much and just fix it when you get a good chance.
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Good to know. BTW I do have an IR gun. Chuck
__________________
1999 Fleetwood Bounder 34J
Triton V10 Gas
2010 Chevy HHR Panel
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05-21-2022, 01:08 AM
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#7
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"Formerly Diplomat Don"
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 24,125
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Bush Fix......Go to Home Depot or Lowes and get some A/C ducting in the same/similar size and attach it so it points away from the rear end. Use some self-tapping screws to attach it to the exhaust pipe.
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Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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05-21-2022, 04:24 AM
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#8
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Senior Member
Join Date: Jul 2015
Location: Manning, South Carolina
Posts: 1,884
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Quote:
Originally Posted by Dutch Star Don
Bush Fix......Go to Home Depot or Lowes and get some A/C ducting in the same/similar size and attach it so it points away from the rear end. Use some self-tapping screws to attach it to the exhaust pipe.
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That's a thought but I will have to see if there is anything like that in 3 inch. I was thinking about an exhaust extension with a downturn. Chuck.
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1999 Fleetwood Bounder 34J
Triton V10 Gas
2010 Chevy HHR Panel
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05-21-2022, 04:58 AM
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#9
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Senior Member
Join Date: Dec 2019
Location: America's Seaplane City.
Posts: 1,179
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Try looking for a gas water heater/dryer exhaust elbow.
Edited to account for caffeine starved scrambled brain.
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1998 Safari Trek 2480, 7.4 Vortec, 118k miles
'15 Kawasaki Versys650LT, well farkled, 104k miles
Mid Flowriduh
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05-21-2022, 05:03 AM
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#10
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Senior Member
Join Date: Jul 2015
Location: Manning, South Carolina
Posts: 1,884
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Thanks. I think I have found one at a Lowes near our next destination. This looks like a quick fix until we can get home and get it in the shop. Chuck
__________________
1999 Fleetwood Bounder 34J
Triton V10 Gas
2010 Chevy HHR Panel
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05-21-2022, 05:16 AM
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#11
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Senior Member
Join Date: Dec 2019
Location: America's Seaplane City.
Posts: 1,179
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Quote:
Originally Posted by chuckbear
Thanks. I think I have found one at a Lowes near our next destination. This looks like a quick fix until we can get home and get it in the shop. Chuck
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Cool.
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1998 Safari Trek 2480, 7.4 Vortec, 118k miles
'15 Kawasaki Versys650LT, well farkled, 104k miles
Mid Flowriduh
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05-21-2022, 06:54 AM
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#12
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Senior Member
Join Date: May 2004
Location: MI
Posts: 2,198
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I doubt if the housing will be more than a few degrees warmer if the exhaust is 3 feet away. There will be a lot of air mixing with it as you go down the road.
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05-21-2022, 12:30 PM
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#13
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Senior Member
Join Date: Jul 2015
Location: Manning, South Carolina
Posts: 1,884
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Drove over 120 miles today and stopped at a Rest Stop. I took an IR reading on the housing. It was 215 degrees right around the U-Joint and less on the rest of the housing. I took a second reading after 225 miles and the reading was the same. I suspect this is not unusual for a fully loaded 34-foot motor home towing a car. I still plan to put either a turndown or 90 degree when we get to our destination tomorrow. Chuck
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1999 Fleetwood Bounder 34J
Triton V10 Gas
2010 Chevy HHR Panel
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05-21-2022, 01:34 PM
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#14
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Senior Member
Join Date: Apr 2022
Location: Renton-Highlands,Wa./HB,Ca./Fujieda-Japan
Posts: 832
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With the air draft blowing underneath while moving it won't be a concern at all. And at idle still not a concern. No load at idle.
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1994 Southwind Storm 28ft - 454TBI w/4L80E
VIN#1GBJP37N4R3314754
Flight System G-Man 360 generator man (PM me)
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