The Central Hub for DSM Community and Information

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. This is where the DSM platform history is documented and archived. Log in to help us in our mission, and to remove most ads from the browsing experience.

compression test results on a 1G Turbo, 148 on #3

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Rally1

15+ Year Contributor
60
0
Oct 19, 2003
2002 WRX,
Since running a RallyX and getting the temps a little high, I have been blowing some white smoke, which remember reading can be a blown head gasket, or other source of coolant getting where it shouldnt'.

Looking at the oil it is not cloudy.

Thanks to the VFAQ on my service manual CD, and website:
http://www.dsmgrrrl.com/FAQs/compression.htm

I went ahead and did a compression test.

1G Turbo, 100k miles.
1 164
2 162
3 148, 148 again on second test
4 165

I also did the wet test (see faq) with oil to seal the rings, the compression test on #3 went to 185.

So that suggests worn rings according to the FAQ.

I just need to know if that all makes sense, and if I have to worry about it short term. The car in not my daily driver. It seems to be my project car ;) .
 
with a blown head gasket you could have oil in the coolant, or coolant in the oil, or identical compression between two cylinders if it is blown between them, or you could be blowing white smoke from coolant entering the combustion chamber. The wet compression test you did you are right , worn or cracked rings. GOOD LUCKOMG
 
Add Value - Be Respectful - No Trolling - No Misinformation - Participate Often!
Support Vendors who Support the DSM Community

Build Thread Updates

Latest Classifieds

  • For sale 2g 2G DSM Link V3
    2G DSM Link V3 $600 + shipping and paypal fees* no cable included * cables are 75 on the...
    • jersygsx
    • Updated:
    • Expires
  • Wanted 2g Shot in the dark (2g Pass strut cut out)
    Need 2g strut tower to save time.
    • frosh29
    • Updated:
    • Expires
  • For sale 2g 2G Mishimoto Radiator & Fan Shroud
    2G Mishimoto Radiator & Fan Shroud $200 + shipping and paypal feesYou must be registered to...
    • jersygsx
    • Updated:
    • Expires
  • For sale VIRGIN 4G63 6-BOLT TURBO HEAD
    Came off a virgin stock AWD Auto 1G DMS (91), also have matching block and crank which are also...
    • The_Partout_Spot
    • Updated:
    • Expires
  • For sale 1G DSM 4G63 6-BOLT TIMING COVER
    Used, see condition in photos. Buyer covers shipping / fees.
    • The_Partout_Spot
    • Updated:
    • Expires
Back
Top