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How... do I break in a rebuilt engine? b230 Oil selections?

posted by  Will740turbo on  Tue Sep 15 18:57 CST 2020
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last visit: Wed Oct 22 16:09 CST 2014
[RELATED]

Thanks for replying.

The cam and tappets are the same used ones that came out of the head. All parts are the same used ones except pistons, rings, and consumables. I did not realize that these are indeed "flat" tappet engines (although the roller tappets look more "flat" to me, ironically).

I swear, I saw one that was like:

Idle to bleed the coolant system. Change oil.
Run 5 minutes between 800 and 1000rpm never steady for more than 2 seconds. Change oil.
Run 10 minutes between 800 and 1200rpm....

It just seemed pretty excessive because it was like 6 oil changes and 2 hours of running time.

I usually don't see any mention of bleeding the coolant, which I always do at idle. How does that factor in?






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