<< Doesn't a hole in an aluminum casting get smaller when you heat the casting?>>
No. As to how it works, the coefficient of expansion of Al is greater than that of steel (12.3 vs. 7.3). When the head expands, all dimensions of the head expand at the same rate, so the holes enlarge as well. Greg -----Original Message----- From: Mercedes [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Mitchell Haley, EA Sent: Sunday, March 23, 2014 5:02 AM To: Mercedes Discussion List Subject: Re: [MBZ] Cool 96 E300 Diesel is hot > The way I am reading this you used some sort of penetrator fluid? > Would this not cool off the plugs, thus defeating the purpose of the > exercise in warming the plugs up to operating temp? I believe the idea was to have the aluminum head hot so that it expanded around the steel plug. I'm not sure how that works, however. Doesn't a hole in an aluminum casting get smaller when you heat the casting? Mitch. _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
