Quote:
Originally Posted by kwmccauley
Hein,
How much history do you have with the car? Owned it since new? Has the cylinder head ever been off the engine before?
If this is the first time the head is being removed and the head bolts now in there were originally placed there by the folks in the factory then your torque estimate makes sense to me. I do recall being quite worried when I loosened the first head bolt. It made a snapping noise and I thought the bolt or the 10mm tool had sheared. The good news is it was the sound the bolt made when it loosened after being in the head for 12 years and 260k miles.
If it would help you, I can attempt an experiment with the original head bolts which I still have. I'll have to think about how to do this but I will attempt to lock the bolt in a large vise and go to increasing levels of torque until the bolt fails if I can make it fail before the 10mm XZN tool fails. The trick will be estimating the torque to failure since I do not have a direct way of measuring it.
Ken
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Hi Ken, forgot switching to Page 2. I mentioned that I finally removed all head bolts. Your suggestion is going above and beyond your "duty" you are just great to have you in our community. On another forum there is a guy who offered step by step guidance to head removal, he quit because he allegedly received hate mail for doing. It's hard to believe but if it is true its a real shame. You are right, when the torque breaks it has a real hard, metallic sound and for a moment one thinks its the tool or the bolt. I bought the car last Feb. with 122 k on it. Looks like brand new in and out, paid 10K for it and is worth every penny. There are no indication it was ever touched mechanically. It came with no service records and so performed all the things what is listed under Service B. All came to a screeching stop when this NUT writing the report though he new it all. Finding out the hard way that a lot is written in this wonderful forum for the asking--the hard part is getting an answer. Anyway, Ken, my hearty thanks. Cheers, Hein
PS. one more question: How heavy is the head, and how about the plastic top guide does it remain where it is after removing the bolt?