Compression test clarification needed
#1
Compression test clarification needed
I've read the FAQ on doing a compression test with a regular piston comp. gauge, my question is which plugs to take out. One link suggests trailing, other says leading plug. Also which is which? I don't want to assume but if I did I'd say trailing was on the bottom??? Just picked up the car last week, runs great, no smoke, I just want to get a baseline so I know the condition.
Many thanks
Many thanks
#2
RX-7 Bad Ass
iTrader: (55)
The key to remember is Trailing Top, Leading Lower.
It really doesn't matter which you pull from what I know. I usually do trailing as they're a bit easier to get at.
Dale
It really doesn't matter which you pull from what I know. I usually do trailing as they're a bit easier to get at.
Dale
#3
Well if both are the same than I guess I'm in good shape. I actually tested it a few nights ago on the leading plugs, not easy to do, so I tested under the car. I warmed up the engine, and got even compression on all three sides of each rotor, then I added the schraeder valve back and got a peak of 120 psi, same for both. I've used this gauge quite a few times and found it to be fairly accurate. I guess I'm in good shape.
#5
I know, I checked it without the schraeder first, and got even bounces on both rotors. After that I put the check valve back in and tested for a peak. If the bounces are fairly even the valve gives a good idea of what the compression really is. I guess if the bounces are not even than that is another can of worms.
#9 towards the bottom.
http://www.rotaryresurrection.com/3r...ion_check.html
#9 towards the bottom.
http://www.rotaryresurrection.com/3r...ion_check.html
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