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running in an engine
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[quote][i]Originally posted by crazybrightman[/i] hmm a good old opinion thread. well from my perspective if you have rebuilt an engine (ie not brand new) then theres only one part to run in the piston rings. all other components withing the engine shoudl be running on a film of oil so dont require running in! the only expectption to this is if you have fitted new pistons or cams aswell but unlikely. therefore you want to bed the rings in as fast as possible do this by using lots of vacum and pressure, (engine braking and full throttle) but this wants to be at relatively mild revs. massive revs = increased piston speed and therefore too much friction and heat going into the rings. all this should be on a running in or mineral oil for 100+ miles, normaly a good 500 but the first 100 are very important. then change to synthetic and off you go. a engine will take a few thousand miles to fully loosen up though from new, and with modern engineering tolernaces and improved material quality bedding in is not as essential as it used to be. how ever thats all imho and everyone has a different theory on it. the safest bet is always to tell people to drive carefully. [/quote]
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