I was doing a compression test on my 22re today. My plan was to do a test cold, add some oil to the cyls, test again, then drive it to warm up, then test again, all to get a good idea of the condition of the engine.
So... no plan survives contact with the enemy, eh?

I got the cold test done, and the bugs started biting so bad I stopped after that.

So, the results of the cold test were:
150/150/145/145

All cold, with no oil in the cyls.

The question is... Are those numbers bad? I know a compression test should be done with the engine warm/hot, to get accurate numbers. I know 170 would be better, but that is a warm reading....

Any comments?
Considering the truck has 230k miles, it seems pretty good to me.

Thanks
Brian

 

A compression test is done with the engine up to operating temp and all spark plugs out of the head. I wouldn't place too much stock in a cold test.

Be sure you follow the FSM procedures, i.e., allow pressure to build but don't crank over 5 or 6 times per cylinder, etc.

 

I think the most important thing is that the compression numbers are close, which yours are all within 5psi, so I think you're good...

 

I looking at some 4 runners to buy 1st toy.What are good compression No.s for the v six and the 22r and is it true that the 22r are better motors than the v 6s

 

Even numbers and within spec is all good. And, personally, I'd say yes in a lot of ways. They just don't have as much power, obviously.