[W126 Coupe] Rough idle

[Marcus Johnson]

Thanks for the input, Jonathon.

Overheating could be a possibility.

There was an indication of water leaking into the valley area and  
some pretty rusty areas in there. You can see evidence of that on  
some of the pics on my blog pages.

My guy thought the lack of seal or warping might have been the result  
of previous head work or may have even been there right from the start.

However, my intuition says that with an engine like this, the factory  
would have never let that through.

Could also be that the guy who did the heads got it out of whack.  
They had to do some welding, so perhaps the heat caused the metal to  
warp.

What also seems odd is that the rough idle comes and goes quite  
sporadically.

Seems more noticeable / worse after getting back into the car after  
it has cooled down from driving.

No problem to take the manifold off and give it a test for  
straightness as suggested. We've had it on and off plenty lately.


marcus

marcus johnson
1985 380 SEC
melbourne, australia

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