How to know if a engine needs rebuilding?

[Andrew Vanis]

How to know if a engine needs rebuilding?

I'm looking at two 83 750 engines and wondering if I can tell which one would be better to use and if either needs a rebuild.

Its a part of my rebuild thread - https://www.thegsresources.com/_foru...uild-questions

[fastbysuzuki]

Strip,inspect and measure is the only way I know.

[gsrick]

Strip,inspect and measure is the only way I know.

Yep, but if they are both still intact and will turn over, you can do a compression and leak down test on them to get an idea of what you're working with. Neither one of them seem to be overly high mileage, but in your description I can see why you may be concerned.

I could use one of the heads if you think of getting rid of one. I have an 84 700 that has broken fins and looks to be JB welded. There is no leaking but it doesn't look good.