JHZR2
Staff member
Anyone have tips for chasing exhaust leaks?
I know on my Cummins 4x4 and my 1991 300D, when stopped at lights with the fan on, I sometimes get stronger than expected diesel exhaust fumes.
I know also that the Land Cruiser that my brother recently bought had some repair putty on the y pipe going into the catalytic converter, at the welded junction.
I don’t have a smoke machine. I do have a shop vac. I’ve seen the ChrisFix video about pushing air up the exhaust pipe by using a shop vac on blow setting.
I can say this - I see no signs of soot, smoke, etc I either the Mercedes or Dodge. I’d think I’d see a black spot. Nothing.
So, what approach do you use?
I may ultimately replace parts, certainly exhaust manifold gaskets, as I know they get leaky, and the Cummins manifold tends to shrink a bit with cycling and heat. But I’d like to get a grasp of the source.
I had some leaks in the post turbo down pipe in my old 1983 300D, but it never smelled in the cabin, I just heard it. This I can definitely smell if underhood with the engine running (but can’t see), and sometimes in the cabin when stopped (never when running). Suggestions?
Thanks!
I know on my Cummins 4x4 and my 1991 300D, when stopped at lights with the fan on, I sometimes get stronger than expected diesel exhaust fumes.
I know also that the Land Cruiser that my brother recently bought had some repair putty on the y pipe going into the catalytic converter, at the welded junction.
I don’t have a smoke machine. I do have a shop vac. I’ve seen the ChrisFix video about pushing air up the exhaust pipe by using a shop vac on blow setting.
I can say this - I see no signs of soot, smoke, etc I either the Mercedes or Dodge. I’d think I’d see a black spot. Nothing.
So, what approach do you use?
I may ultimately replace parts, certainly exhaust manifold gaskets, as I know they get leaky, and the Cummins manifold tends to shrink a bit with cycling and heat. But I’d like to get a grasp of the source.
I had some leaks in the post turbo down pipe in my old 1983 300D, but it never smelled in the cabin, I just heard it. This I can definitely smell if underhood with the engine running (but can’t see), and sometimes in the cabin when stopped (never when running). Suggestions?
Thanks!