Offshoreonly.com - Break in oil for stock 7.4 330-350??

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klmken

04-10-2002 10:36 PM

Break in oil for stock 7.4 330-350??

I know I am opening a can of worms but what weight natural oil for the new motor??

puder

04-10-2002 11:47 PM

i have heard teh best way to break ina new motor is with light weight valve springs or even a set of old lower ratio rocker arms

Geo 100

04-11-2002 08:35 PM

30 wht. non det. petrolium oil. Break in cam dump oil Refill with same. Run to operating temp and cool completely for about 6 times. This is to allow (work hardening) to pistons which will harden the soft alu of the piston and become harder than before and scrub the rings to the cyl. After that you can go to a better oil
(syn, or petrolium) and hammer down. Good luck. GEO

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