compression test

[samaspinall]

New poster! (less than 10 posts)

how do you do a compression test ?

[Nick k]

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.

[RICHIE]

New poster! (less than 10 posts)

how do you do a compression test ?


take spark plug out screw in the tester into its place open the throttle whilst cranking and take the reading. repeat the process on all cylinderss.

[raj]

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.

[Nick k]

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.

Too slow!! winner :laugh:

[Spooky]

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.

when you crank the engine, ensure the throttle postion is open

[RICHIE]

last time the king lead shoked me my filling fell out:crap:

[raj]

when you crank the engine, ensure the throttle postion is open

oops, forgot about that.

[Spooky]

oops, forgot about that.

yea, sort it out mr :disagree: :wasntme:

[michael tierney]

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:)

[Nick k]

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:)

I said somebody will know better! :D Big words too. :p