New poster! (less than 10 posts)
how do you do a compression test ?
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New poster! (less than 10 posts)
how do you do a compression test ?
Take out all spark plugs. screw compression gauge in spark plug hole. Crank engine over for afew seconds which should give you a reading on the gauge, record reading, Note: If you don't know how to kill the spark try not to electrocute yourself or your mate when cranking. repeat for the 3 other cylinders. remember to depressor buttom on gauge to reset it each time. Figures in the region of 120 - 140 psi is about right. somebody will know better.
buy a compression tester
take the king lead off the dizzy cap.
take all spark plugs out
screw the comp tester into one of the plug holes
crank the engine over about 3/4 times
note the reading on the comp tester.
redo this for the rest of the cylinders.
last time the king lead shoked me my filling fell out:crap:
remove plugs,remove coil lead from distr.cap and place near a good earth/return/chassis/engine,fit comp.tester into plughole and crank engine with throttle open until guage doesn't read any higher,than repeat for the next cyl's.for a good prognosis do test cold and then at a later stage do it hot.take note of how high the needle on guage jumps with the first pulse and take note of the readings.cold should be more than 9 bar and hot should be more than 9.5bar:)