anyone know how to do a compression test with the 2.0?

bump

 

I would think this:

http://store.summitracing.com/partde...5&autoview=sku

 

not same brand but the same thing i got.

 

http://www.vw-resource.com/tune-up.html#compression

 

thanks for the reply but i dont get it still.

 

you just pull out ur plugs and put the end of the tester inplace of them. Have someone turn the engine over 6 times and write down what the gauge says. Repeat for each cylinder and all should be at least 100 pounds and within 5 of each other.

 

Exactly, and make sure you check your finding against spec.

 

but what do you do with the spark plug wires that you have disconnected? wont you mess up the electronic ignition system doing this? we have electronic ignition thats why im a little worried.

 

can't help you there, the only test i've done was on an older s-10

 

Hold them with your mouth

























DONT DO THAT!

I couldn't tell you what to do with them

 

 

Compression test:
1. Remove fuel pump relay
2. Start vehicle and idle until vehicle stops running. Do not open throttle at this time as its possible for vehicle to run lean and detonate.
3. Disable ignition system
4. Put battery charger on battery and set to a medium charge (roughly 20 amps)
5. Install tester into number 1 spark plug hole
6. Have helper sit in car and hold the throttle at WOT.
7. Have helper crank engine until needle stops moving up.
8. Record reading
9. Repeat steps 6, 7 and 8 for all cylinders.
10. Verify readings above spec and within 15% of each other (if manufacture doesnt give a variance spec)
11. If readings are low in any cylinder, place a few drops of oil through spark plug hole and retest that cylinder. If compression increases, the pistons rings are at fault. If compression does not increase move to step 12.
12. Perform cylinder leakage test to verify conditon of head gasket, and intake and exhaust valves.

There you have it. Thats how to do a compression test 101 brought to you by your local GM service technician.