| Re: [GMCnet] Cam wear question. [message #237909] |
Wed, 29 January 2014 06:14 |
Jim Bounds
Messages: 842
Registered: January 2004
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I totally agree. A dry run test only says parts all move and there is some oil pressure. The big guys do it because its all the time they can spend in the production of that st ock keeping unit. Its not a motor to them, its a mechanical wiget that only has a certain amount of labor devoted to it. Time is money, a real run in takes work yime. We devote @ $500 of labor and mate rials to run in a motor before install.
Jim Bounds
-------- Original message --------
From: Harold <jal747@mac.com>
Date: 01/28/2014 11:13 PM (GMT-05:00)
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Cam wear question.
Rob, I asked the builder if his spin test qualified as a cam break-in and he emphatically said no. If the time specified for cam break-in is based partly on the number of cam/lifter contact events, then it would follow that 20 minutes of run time at 200rpm is 10 fold short of a cam break in or break in of any other engine component I can think of. Besides being a fancy leak checker, the spintest might just be a marketing tool and might even do more harm than good to every moving part in the long run...who knows?
W.
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