Exhaust manifold swelled and cracked
#1
Exhaust manifold swelled and cracked
I noticed recently that my new to me 1986 developed an exhaust leak. Removed the heatshield and found this
I removed the manifold because Im going to replace it. But Im wondering if running lean caused this. What can I do to prevent this? Or this the way these things go with these cars
I removed the manifold because Im going to replace it. But Im wondering if running lean caused this. What can I do to prevent this? Or this the way these things go with these cars
Last edited by Brewtech; 05-20-2022 at 07:41 PM.
#2
Join Date: Nov 2012
Location: Joyner, Queensland, Australia
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I have never seen this before in 30+ years of S2 and S3 XJ6 ownership as well as assisting numerous other friends with XJ cars. It is definitely not normal!
I was wondering if it could be an over rich mixture on the third cylinder from the front with the mixture still burning as it exits the cylinder.
That is just a guess. I honestly have no idea.
I was wondering if it could be an over rich mixture on the third cylinder from the front with the mixture still burning as it exits the cylinder.
That is just a guess. I honestly have no idea.
#3
I drove to my local indy, showed it to him, and he told me he’s seen it many times over the years. Typically an injector is dirty or theres a vacuum leak. So it has probably been running lean or like you said, over rich. Im going to install the new manifold and have him service the injectors and look for vacuum leaks. This is crazy though. Ive never seen it either in any car Ive ever owned
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Greg in France (05-24-2022)
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