compression???????

[critchfield]

heres the numbers for my talon awd tsi 155,155,135,145 is that bad???? let me know thanks

 

[92redman]

If it were me, I would be a little concerned about that 135 cylinder, thats over 10% difference. The others are good though.

 

[critchfield]

yea your right I guess i'll pull the head any suggestions for replacing valves (where to buy and what not) the engine has 135 k on it

 

[91TalonTSiCT]

low compression is usually worn rings, not worn valves.

 

[tsunari]

You could also do a leak down test to pin point what's wrong . .

 

[Defiant]

Originally posted by 91TalonTSiCT
low compression is usually worn rings, not worn valves.

Compression leakage is as likely to be rings as valve seats. To rule out valve seats, you do a "wet" test, where you blip just a bit of oil into the cylinder so it can seal up the rings. If the compression number is still low, it's valve seats/faces.