Exhaust Manifold leak - PeachParts Mercedes-Benz Forum

PanzerSD · #1 08-09-2006, 08:13 PM

I did a search on "cracked manifold" and came up snakeyes,

I know I have an exhaust leak at the manifold, I was wondering how common cracked exhaust manifolds are on 617 engines.

R Leo · #2 08-10-2006, 05:29 PM

Quote:

Originally Posted by Got_The_Benz

I did a search on "cracked manifold" and came up snakeyes,

I know I have an exhaust leak at the manifold, I was wondering how common cracked exhaust manifolds are on 617 engines.

I've never heard of one cracking.

FWIW, my '84 300D (W123) developed an exhaust leak at about 280,000 miles. Like you, I suspected the worst but was surprised when I pulled it apart only to find a bad exhaust gasket. The job was a lot of work but not nearly as bad as it could have been. Mercedes use of quality fasteners manufactured from the right materials made dissasembling the 20+ year exhaust system relatively easy.

sixto · #3 08-10-2006, 07:57 PM

I've heard of the accordion section between the 4 runner section and the solo runner section cracking. The manifold has to come off to replace the accordion.

Sixto
... stay tuned

#4 08-10-2006, 08:39 PM

My old manifold had a heat crack. It didn't leak and I never knew it had any problems until I the turbo was removed.

Stevo · #5 08-10-2006, 10:03 PM

Quote:

Originally Posted by Got_The_Benz

I did a search on "cracked manifold" and came up snakeyes,

I know I have an exhaust leak at the manifold, I was wondering how common cracked exhaust manifolds are on 617 engines.

A couple of years ago I bought a 240D with an exhaust manifold leak, replaced gasket ...end of problem

PanzerSD · #6 08-10-2006, 10:15 PM

well, thanks guys!

Now my mind is at ease knowing on only have to spend $30 on a gasket instead of $300 for a manifold

I'm in the progress of eliminating (or at least attempting to) my various oil leaks, and I think I got it nailed down to a dripper from the turbo drain, and a seeping on the manifold side of the head. I 've reduced my oil consumption from 1L per 500kms to about a quarter of that....

sailor15015 · #7 08-10-2006, 10:31 PM

Getting the manifolds off and replacing the gasket is cake. Just make sure you don't damage the threads on the studs that secure the manifolds in place. I installed an EGT gauge pre-turbo a few months ago and I kept putting the manifolds on and off to test things and I could see that I was starting to flatten down the threads on a couple of the studs. Luckily the bolts went back on with just a little bit of resistance but I'll probably have to address this issue if I have to take them off again.