Re: [CAD_CAM_EDM_DRO] cast iron

I was made a believer in aging engine blocks when I helped a friend mike the
piston bores of his 1970 vintage Volvo. As I recalled they aged the blocks
for one year. When we mike the bores, there were the original hone marks and
the wear was .0002. The block by the way had 120,000 miles on it. The cam
ground pistons were also nearly perfect. The only detectable wear was on the
camshaft do to some mechanic improperly adjustments of the valve stem
clearances.
Dan
-----Original Message-----
From: Joe Vicars <jvicars@...>
To: CAD_CAM_EDM_DRO@yahoogroups.com <CAD_CAM_EDM_DRO@yahoogroups.com>
Date: Thursday, February 08, 2001 10:34 AM
Subject: Re: [CAD_CAM_EDM_DRO] cast iron

>
>I have it on good authority that in the "old days", engine block castings

were buried in the dirt for six months or more.

>Like wine, the older the better. This is never done nowadays due to

obvious reasons.

>Problems from not aging engine blocks do still arise however.
>You will remember about 10 years ago a big problem with a certain brand of

RV with a certain deisel engine experienced almost 100%

>failure rate under 30,000 miles. The blocks were not properly stress

relieved.

>
>
>
>Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the

discussion of shop built systems, for CAD, CAM, EDM, and DRO.

>
>Addresses:
>Post message: CAD_CAM_EDM_DRO@yahoogroups.com
>Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
>Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
>List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...
>Moderator: jmelson@... timg@... [Moderator]
>URL to this page: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>bill,
>List Manager
>
>FAQ: http://www.ktmarketing.com/faq.html
>
>