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mlh2013 · 05-08-2018, 06:00 AM

I found my exhaust was leaking where the pacbrake joins the turbo. Would this cause the pacbrake to have less braking power?

Jthigh · 05-08-2018, 06:14 AM

The short answer is yes, but the size of the leak would determine how much it would impact the braking performance.

Ivylog · 05-08-2018, 06:22 AM

Yes but that's so small a leak...not much difference in braking. I would tighten the clamp.

palehorse89 · 05-08-2018, 06:27 AM

Did you try to snug down the "V-Band" Clamp when it is cold? Spray a bit of penetrating oil on the clamp's threads and where the nut is turning, and see if you can snug it down a bit. No braking loss with a leak that small.......
Cummins does make small thin gasket's for the full "Marmon" mount and the half Marmon mount.

pumper9x9 · 05-08-2018, 06:42 AM

I'd be more concerned about damage to the turbo. Either way get it fixed.

mlh2013 · 05-08-2018, 06:50 AM

Quote:

Originally Posted by palehorse89

Did you try to snug down the "V-Band" Clamp when it is cold? Spray a bit of penetrating oil on the clamp's threads and where the nut is turning, and see if you can snug it down a bit. No braking loss with a leak that small.......
Cummins does make small thin gasket's for the full "Marmon" mount and the half Marmon mount.

I haven't tried to tighten it yet, going to do that today. I recently took the PB off because it was stuck closed, I repaired it and reinstalled. I purchased this Mh last Oct. still trying to learn about it. But it doesn't seem to have much braking power when I engage the PB. My previous MH (Diplomat) had much more braking power when engaged. I do understand that this coach is heavier than the dip was.

palehorse89 · 05-08-2018, 08:27 AM

Quote:

Originally Posted by pumper9x9

I'd be more concerned about damage to the turbo. Either way get it fixed.

A exhaust leak will not hurt or damage a diesel turbo..........the turbo does not care where the exhaust gases go.....

stuhly · 05-08-2018, 09:06 AM

You will wind up with exhaust smell and soot inside the coach if not fixed.

FIRE UP · 05-08-2018, 09:34 AM

Quote:

Originally Posted by mlh2013

I haven't tried to tighten it yet, going to do that today. I recently took the PB off because it was stuck closed, I repaired it and reinstalled. I purchased this Mh last Oct. still trying to learn about it. But it doesn't seem to have much braking power when I engage the PB. My previous MH (Diplomat) had much more braking power when engaged. I do understand that this coach is heavier than the dip was.

mlh2013,
A very important point here. You've been suggested to use some spray of just about any type on the threads of that V-band clamp if and when you go to tighten it. I can't emphasize that too much. I had the same exact leak you do and, I went to tighten mine and the threads SNAPPED! CRAP! So, I started looking around for them and, WOW is all I can say when I found the cost. Below is an Amazon link to one. When I found that cost out, out came the fabrication tools. I simply cut off the head off of the same diameter bolt and welded it on to the broken end of the V-band clamp bolt.

It's been like that for about 3 years now and still working flawlessly. But had I not had that welding setup and the ability to repair it, I was looking at maybe $21.00 for one clamp. So, be careful and get that lube out and spray that thing.
Scott

https://www.amazon.com/Ticon-Industr...and+clamp+5%22