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      10-17-2021, 10:54 AM   #86
Helmsman
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Drives: 2011 AW E90 M3 ZCP
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Quote:
Originally Posted by tbuck View Post
That is totally true, certainly of many bolts, although not all are due to torque-to-yield. Some are due to there having encapsulated Loctite on them and other similar reason. The VANOS are clearly using a stretch type bolt. The valve cover bolts, however, are M6 bolts and as such are certainly not torque-to-yield and if stretched would undoubtedly snap. Also, they have a shoulder that seats fully on the head surface and therefore there is nothing to stretch. The one-time-use part of these is the rubber seal, which will likely not seal at all when being removed after years of heat cycles. If removed after only a short time they will be fine and will reseal properly.
Totally convinced by now, thanks. Trying to order I checked realoem who state 24 in total is needed. Howevet looking at the drawing it seems to be 13 holes per valve cover e.g. 26 in total. What am I missing here?

Edit: just realized there are 12 normal size (11127841217) and one long (11127841218).

Last edited by Helmsman; 10-17-2021 at 02:45 PM..
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