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Re: [GMCnet] Reviving the Cad 500 [message #162872 is a reply to message #162871] Tue, 13 March 2012 12:58 Go to previous messageGo to previous message
Larry is currently offline  Larry   United States
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
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Senior Member
Ken Henderson wrote on Tue, 13 March 2012 12:05



Although I was very careful about cleaning the inside of the engine, I
did not completely disassemble and hot tank it, so I want flush well
it with motor oil: I plan to put about 50-75 miles on the oil that's
in it now (with a quart of Marvel Mystery Oil added) before changing
it and the filter to eliminate any serious debris that may be left.
Then we're going to Atlanta next weekend for a friend's birthday
party. After that 200 mile trip I'll do another oil and filter change
before we depart next Tuesday for Shawnee. If the engine fails again,
I seriously doubt that it will be because of residual debris.

Ken H.


I think you will be OK, but I guess I would not even go that 50-75 miles on it. That's one to 1 1/2 hours of driving. JMO, but I'd start it and let it idle for 10-15 minutes with no load, using (any brand of 10W30) oil, and shut it off and change it. Do that twice, and then take it for a drive. Just the way I'd do it. At this point, oil is cheap. I've done quick and dirty rebuilds on motors where people didn't have the money to "do it right". Did the rebuild with the block in the car still hooked up to the trans. Put in rings, did a Q&D valve job with seals, buttoned it up and did several quick oil changes to get the debris that washed down into the pan out. Those motors ran a long time...of coarse they were not in a motorhome either...soooo....


Larry Smile
78 Royale w/500 Caddy
Menomonie, WI.
 
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