View Full Version : testing compression w/ engine out of car

03-22-2002, 02:51 PM
OK, I picked up my sr last night.
Today I went to test compression, and these were the results; 60,50,60,55. This can't be right!

This was NOT DRY. I removed the spark plugs, then poured a little oil in each cylinder, and manually turned the crank pulley several times to lube the bores, then I took these readings.

Is it possible to get an accuate reading without cranking the engine with the starter? As far as I know this is the only way to test manually, does anyone have a suggestion? http://www.freshalloy.com/

03-22-2002, 03:33 PM
wire up the starter with a car battery =) let it crank 5 times... just use some rubber gloves, dont want to get shocked.

03-22-2002, 03:39 PM
Thanks Robert, but should I have someone hold it up or bolt it to something, so it doesn't tip?

This is a dumb question, I know.

03-22-2002, 08:16 PM
first off...was the throttle wide open and was the engine warmed? i doubt the engine was up to temp, since it's out of the car (obviously), and it doesn't sound like you did anything to the throttle.


03-22-2002, 08:24 PM
yea gotta be warm and in the car, I got 20 psi on my S14. http://www.freshalloy.com/ as long as you got all four cylinders in about the same compression, you are cool.

edit: it was totally dry...

[ 03-22-2002, 08:25 PM: Message edited by: mike2016 ]

07-08-2002, 08:57 PM
If you get all 4 cylinders in the same/close compression, it's should be good? Does that apply for both wet and dry compression test?

As far as cranking with the starter, is that done the wet or dry way?