The complete automotive resource for buyers, sellers, and owners like you.
Car, Truck and SUV Forums at Roadfly
+ Bentley Forums
+ BMW Forums
+ Cadillac Forums
+ Chevrolet Forums
+ Ferrari Forums
+ Jaguar Forums
+ Lamborghini Forums
+ Lotus Forums
+ Mercedes-Benz Forums
+ Maserati Forums
+ MINI Forums
+ Porsche Forums
+ General Discussion
+ Marketplace Forums
Re: 750 head bolt failures--why they happen (archive)
[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]
Posted by Ekkehart Rackete, Bochum Germany on January 15, 2001 at 01:58:40:

In Reply to: 750 head bolt failures--why they happen posted by Jim Derrig on January 14, 2001 at 17:12:42:

Excellent explanation,

even the White collar technicians (or rather rather engineers) that designed these engines in Germany call them stretch bolts = Dehnschrauben.

On the other hand it is good practice to replace headbolts and similar bolts like on rods once removed. Stretch bolts have always been used by BMW e.g. on flywheels of the very early 4 cylinder 1500cc engine in the 60s. Not knowing that I sheared off all bolts on a fly wheel.

Since bolts come very cheap, compared to the labor and potential damage if they are not replaced...

Thanks again for the info, Ekkehart

Follow Ups:


[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]
Questions, comments, or problems, please visit the Roadfly help desk.
Roadfly.com Logo © 1997 - 2009 Jump Internet Inc. All rights reserved.