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      06-08-2023, 11:38 PM   #14
john_s
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Drives: e92 m3
Join Date: Jul 2019
Location: California

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Quote:
Originally Posted by DrFerry View Post
Well done doing all of that yourself and thanks for the write up. I have to ask though.. how the heck did you get the broken valve spring out of the head? Surely you had to remove the camshaft, and timing chains as well as other parts?
Yes, it's a whole timing job. Remove valve cover, drain coolant, remove front radiator fan and a bunch of coolant hoses, remove both driving belts and stuff in the way to get to the harmonic balancer. Check timing by turning the crank (I bought this to turn the crank) to TDC (or maybe one full turn after TDC) and lock camshafts with the timing tool. Loosen cam bolt, remove vanos gears (remember to lock the two exhaust gears with the timing tool), remove cam caps and camshafts, and you have access to the valve spring. I got lucky it's cylinder 1 that needs repair. It's going to be a lot harder if it's cylinder 4
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