Quote:
Originally Posted by RPalmer
Roblynn,
When you rebuild an engine you go through it and make all clearances like new. Then you replace any and all worn parts with new. That's a rebuild.
An over haul is when you go through an engine and make sure all clearances are within specs and use acceptable used parts in the place of worn ones.
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I think rebuild and overhaul are the same term. In the aviation engine world, 'overhaul' usually entails new pistons, cylinders, machining, etc. at least to some extent. Sometimes just the top end is done (I think this is referred to as a "top overhaul" ... any A&P in the audience please correct me) and a more major overhaul will bring the engine back like-new condition.
Where I'm from, 'rebuild' and 'overhaul' mean basically the same thing....in my mind, re-ringing an engine and doing not much else would be considered 'freshening up' in my mind.