Engine stored for 3 years....

[Cletonius]

I'm selling it and need to run compression tests.

Is there anything special I need to do before cranking this over by hand to do the tests? Should I spray anything in the cylinders?

It was a strong running motor when pulled, I'd like to get the numbers without causing any damage.

Help?

[Bullhead]

I always like to spray just a tad of Marvel Mystery oil in each cylinder if had been setting a while.

[dnguyen1963]

Squirt some regular 15W40 would be just fine before hand-cranking the engine.

[Cletonius]

Thanks guys. No worries about bearing damage?

[TobyB]

Nope. Pull the plugs, roll it over. The oil's still in there.
But it's a good idea to roll it over enough to get oil flow, then get
oil onto the cam. In fact, might grease the cam just for good measure.
I usually spin it on the starter until it shows good pressure....

t

[Cletonius]

Cool, thanks!

It's on a subframe with no trans or accessories so using the starter isn't really an option. :(

[LJ851]

Cool, thanks!

It's on a subframe with no trans or accessories so using the starter isn't really an option. :(

With the plugs out you could drive the crank bolt with an electric drill or impact wrench.

[BLACKCHARM88]

Change the oil, after all those years of sitting the engine accumulated moisture into the oil.