Compression numbers on the POS

[chavez408]

1g gst
200kmiles on engine
joe p MBC
Boost gauge
Injen intake
k&n

1cly
1st try; 150
2nd try;151

2cly
1st try; 120
2nd try 130

3cly
1st; 150
2nd try;150

4cly
1st try;120
2nd try;114

Did the following wet test on clys #2 and #4

Results after 1-2 teasspoon of oil

#2; 150. Piston rings? since it went up 30 up

#4; 125-120..

comments?

 

[robs90tsi]

Ya, if the numbers rise significantly during a wet test like yours did on the #2 cylinder, then that means the rings are wearing/worn. Then again, those numbers arent bad, considering you have a 200K mile GST, cylinders #4 and #2 are low, the motor is due for a rebuild, but I wouldnt tear it down until it dies, why bother, unless you have the money, time and another vehicle, is there something wrong with the motor?

 

[dnhieu]

when you did the test was the car warmed up and did you hold the throttle at WOT...

this can sometimes make a big deal...

 

[nube90]

If it isnt broke dont fix it, but those are low numbers time for a rebuild in the near future.

Make sure it has a fully charged battery also.

 

[chavez408]

There is always something wrong with her
Na, she is running o.k considering the miles on her. I haven't had no problems with the motor yet, a couple of boost leaks, excesive oil leaks! Will the rings be causing a little bit of the leaks?
The car was warm up, and at WOT . The battery is a few months old(2), she is fine aswell

i'm just trying to get her running hard before heave modding her

 

[robs90tsi]

There is always something wrong with her
Na, she is running o.k considering the miles on her. I haven't had no problems with the motor yet, a couple of boost leaks, excesive oil leaks! Will the rings be causing a little bit of the leaks?
The car was warm up, and at WOT . The battery is a few months old(2), she is fine aswell

i'm just trying to get her running hard before heave modding her

The only leak that you can see the rings can cause is smoke out of the exhaust, most likely under boost youll get some blue smoke, depending on thier condition, but some common oil leak spots are the oil filter housing, oil pan, valve cover, and the turbo return line, thats just a few, is there oil under the car up front like under the oil pan? The piston rings cannot cause an external oil leak such as that. I see its a GST so your oil pan gasket should be easy, valve cover gaskets are pretty straight forward too.

 

[chavez408]

I see alot of oil around the turbo, and the wastegate. There is some on the intercooler pipe(bottom) as well. I should take some pictures. She does waste alot of oil (1-2 qyts a week). Depanding how hard i drive her.

There is oil in front of the oil pan. And i have replace the valve cover gasket recently.