compression test

[Godzilla]

View attachment 1643

anyone have a how to guide as iv got a kit coming and could do with a step by step thanks

 

[NME_RR]

If you have a front mount I/C, nice n easy!!

Remove all the plugs,

Insert gauge and crank engine 3-4 times,

Record result,

Move to next pot,

Repeat ect ect,

It should come with instructions mate!

around 150psi is good, any lower and kiss your wallet good bye

 

[NME_RR]

Oooh disable the coil as well!!

Remove the HT lead, or unplug it!!

 

[Godzilla]

do i unplug the main ht lead from the coil , think it says coil on it not sure,

 

[MORF114]

Dont tighten the probe end too much in the hole my kit has a swivel end on it and it wouldnt come out for ages after i tried it for the first time lots of long screwdrivery action got it undone but wouldnt do it again, there is a grey plug in front of the coil above the water hose for the turbo just unplug that one.

 

[Animaldaz]

You should hold the throttle open too when cranking

 

[NME_RR]

You should hold the throttle open too when cranking

Ah yea that bit aswel!!


Disabling the coil is safety for you more than anything,

if you think a tazer is bad try holding on to a HT lead!! (or not)

 

[ashills]

dont forget to take the car out first to get it warm and up to temperature
the crank with throttle open
and u want them all within 10% of each other

 

[Godzilla]

Ok guys thanks I take it it's a 2 man job cos u can't see a Reading on the gauge while trying to crank the motor over

 

[gtir_pimp]

1 man jobby. the gauge will hold the reading, so you can get out the car and check it. instructions will come with it and are very straight forward. i left my car ticking over until it was up to temp in my garage whilest having dinner! think i turned the key for about 6-8 seconds.

 

[Godzilla]

Got my kit today and no instructions just the kit but atleast u guys have helped, also is it defo around the 150psi mark I shoul be looking for.

 

[gtir_pimp]

everyones is different. as long as the cylinders have almost the same psi its good. i have 155psi on all 4. do the test and post up the results

 

[Godzilla]

i will do it over the weekend.thanks again all

 

[Godzilla]

Once iv disabled the fuel pump relay and coil, then removed the ht leads do I just leave the plugs in apart from the one I'm working on or do I take all out

 

[ashills]

take all leads and plugs out so any leakage between cylinders can be shown

 

[Godzilla]

ok thanks guys i will post results when iv done it

 

[warringtonjack]

ok thanks guys i will post results when iv done it

Did you do this yet or what?? :lol:

 

[Godzilla]

no mate not yet iv been busy working but am gonig to try over the long weekend while i paint my wheels