Diesel Exhaust leak...tracking the source - Defender Source
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  #1  
Old April 17th, 2016, 09:12 PM
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Adam
1988 D90 RHD 19J
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Diesel Exhaust leak...tracking the source

My exhaust system on my 19J is in pretty good nick with what looks to be fairly new front and rear boxes...but I still get a pretty good smell of fumes (not dangerous levels but you can smell it... in the cabin with the windows shut and vents closed...cannot seem to figure out where its coming from...It may be getting pulled in from the fresh air intake but I cannot see any obvious place....what is the best way to track it down? It there a meter that some mechanics or exhaust shop might have that they can sniff the system to help find the leak....
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  #2  
Old April 17th, 2016, 09:41 PM
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John B.
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Is the exhaust exiting to the rear side as stock?

Any leak in the air intake?
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Old April 17th, 2016, 09:51 PM
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Adam
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Yes...to the rear side as stock....the fresh air intake for the "climate system" (yes that is a joke) seems to be solid....and with the engine running and sniffing around under the bonnet and under the car I can't seem to pinpoint anything...
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  #4  
Old April 18th, 2016, 03:35 AM
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Omar Alomar
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Check the rear door weatherstripping.
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  #5  
Old April 18th, 2016, 06:34 AM
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Mike
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You have a couple joints in the pipes with one under the seat box. I would check to see how they are doing as well.
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Old April 18th, 2016, 06:48 AM
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Neil Steinhagen
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Putting your hand over the exhaust will increase the back pressure and can sometimes show you leaks in the exhaust system.

2 person operation. One to cover the exhaust, one to be under the truck or in the engine bay. Be smart, don't burn your hand. Welding glove or do it when the exhaust is cold.
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Old April 18th, 2016, 08:02 AM
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I had diesel smell in the cabin as well - turned out to be a leaky spill rail on the fuel return line. The fuel would drip onto the block and when hot, the fumes would enter the cabin.
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Old April 18th, 2016, 12:56 PM
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Adam
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Will do some checking...

Quote:
Originally Posted by LostChord View Post
I had diesel smell in the cabin as well - turned out to be a leaky spill rail on the fuel return line. The fuel would drip onto the block and when hot, the fumes would enter the cabin.
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