OK well firstly, it goes without saying, I am genuinely, enormously embarrassed
I have been working intimately on these V6 lumps for around 8 years, and am very aware of camshaft identifications, cap rotations, and how the sprockets align to the keyways on each bank. The fact that I somehow fitted the 1-3-5 inlet cam onto the number 1 keyway is absolutely beyond belief, I am absolutely gutted, and can only apologise
I guess he who never made a mistake..
Anyway, so - the new 1-3-5 misfire, introduced after the work I did replacing the 2-4-6 head, was basically a silly mistake by me, which is now sorted, and that misfire has gone.
Back to the original problem - The original complaint (the reason I went to look at the car in the first place) was a misfire on the
2-4-6 bank immediately following Cambelt / servicing work. Low compression was found on that bank, and damage to the piston crowns/valve seat etc which is why I changed the head.
This problem is now sorted, with good compressions, with a new head in place, and the 2-4-6 misfire has gone. So the work we did by changing the 246 head, aside of the hiccup/delay, has fixed the original complaint.
I Guess we'll never know, but I am intrigued as to why it was fine before the work was done, and immediately afterwards was misfiring on the 2-4-6 bank. There are absolutely no signs of any poor workmanship, and also I Can't think of any possible way that a foreign object could get into each of the three cylinders on that side anyway...
So what was the cause of the initial complaint - the reason this thread was started? I'm just asking for my own learning, as in my mind, it is still a mystery unsolved
I hope you demanded a full refund..
Seeing as this was done on a "bung me whatever you think it's worth" basis, my only expectation was really a few beers, so that would be kinda difficult... but needless to say I am pleased with Steve's generous donation
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Topic: Engine Loom (Read 42712 times)