Wildcat_4R

Well....I just tested my 22RE for compression and the results weren't too exciting. Compression was 0, 85, 85, 85 from cyl 1 through 4 respectfully. Would it still be possible to get the motor running with readings like this?

Wildcat_4R

What would be the minimum compression that a 22RE would run with. What's the lowest any of you have seen?

Glenn

Get it running? You need to fix it first. You've got a blown head gasket and your other cylinders don't look too hot either. If you run it like that, it will soon make a nice boat anchor.

jimbo74

sure you did the test right? what about doing a wet test, where you pull the plugs and drop atf or oil down the hole?

Fahrenheit 451

Minimum is 142. I don't know much, but it sounds like maybe something in the testing wasn't right. I'd think the only way you could get a zero reading would be with the head off or the piston had a hole blown in it. The rest are all way low too. I'd say check your gauge and run the test again and see what happens.

Wildcat_4R

To do the test...I removed the wires from each plug and took out 1 spark plug. Then I screwed the hose into the spark plug hole and attached the pressure gauge. Cranked the motor for several seconds and took a reading.
Would a reading of zero appear if a valve was stuck or there was a crack in the head?

alltrac165

You would get 0 if the valve was held open(or broken), or a hole in the piston. Try doing the test with all plugs removed, and your throttle held wide open. Test each cylinder, then squirt some oil down each plug hole, crank it over a few times and re-test. Compare readings and post your results. The 0 isn't hard to believe, but 85 in all the remaining cylinders is ridiculously low and all the same, which is kinda weird.
Just out of curiousity, are your valves set correctly, and is the cam timing ok?

terryjmatthew

My 2SELC(2.0) Celica ran w/ 90lbs across the board.
Just took a few spins to crank it.

SoCal4Running

Yea take all the plugs out and hold the throttle WFO and let it crank for atleast 3-5 seconds each time.

wrenchmonster

A proper compression gauge has a hose with a valve on the end. Hence, you turn the engine over until you reach your maximum reading, this is your max. In other words, once you reach your maximum reading the valve on the hose will not open up anymore and your gauge will not increase.

A "0" reading is not uncommon. A wet compression test is a test for the rings. If the holes that have 90 psi do better with a wet test then you're probably looking at rings. I think your problem is 2 fold. On the hole with 0 psi, you're probably looking at a valve problem, or your HG is shot or something is cracked.

The long and short of the situation is that you need to remove your head for further investigation.

-Wrench