||In article , ||WHTDOG469 wrote: ||>>From: Wakeley Purple snipped-for-privacy@remove.me.iglou.com ||>
||>>Not an experienced anything, but lots of visits to
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tought me ||>>that some engine mount bolts have to be replaced when doing the TB. It's a ||>>big expensive job. You don't want to have to do it again for the WP. ||>>
||>>Make sure they replace the bolts, they "stretch" when installed (maybe the ||>>new ones don't?). ||>
||>I've always had the impression that only the head bolts "stretched". My only ||>experience here is an 84 diesel Jetta so I may be wrong. Are there other bolts ||>on the motor that stretch, maybe on a newer vehicle?
All bolts stretch under toque. That's how they work. In fact, the most accurate way to measure the torque of a rod bolt is to measure the change in overall length (stretch) when torqued. It's right when it's exactly the length specified for that fastener. Many newer engines - 1.9 Escort was the first I recall - have a type of headbolt called Torque to Yield. They do not return to their original length when removed, so they must not be removed. If your engine has this type of head bolt, there should be plenty of clues, on the gasket set, in the workshop manual. Texas Parts Guy