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    Thread: Compression Test Results - How much life is left in this motor?

    1. Member
      Join Date
      Apr 26th, 2006
      Evolution IX
      10-04-2012 07:15 PM #1

      Car is a 2000 Toyota Corolla. Compression ratio is 10:1, 175K miles on odo:

      Cylinder: PSI
      1: 185
      2: 165
      3: 135
      4: 165

      With these huge variances and #3 being extremely low, what is your guess as to how many miles are left? Car gets consistent mileage (~33 combined, 60/40 city/hwy), no oil leaks, but burns a quart approx every 500 miles.

      Probably will donate this car to charity, but looking for a ballpark number.

      *Thanks in advance*

    2. 10-04-2012 07:23 PM #2
      according to my calculations and years of experience, you have 1,453,297,297 life left in that car

    3. Senior Member
      Join Date
      Nov 7th, 2001
      The Village
      KAR 120C
      10-04-2012 07:23 PM #3
      Impossible to say without knowing more.

      Do a leakdown test and a wet compression test and get back to us.

    4. 10-04-2012 07:24 PM #4
      It could run like that until the end of time, or it could blow up tomorrow. There's not really any way to predict this.

      If you have emission testing in your area, the next test failure will probably be the end of it. Pumping that much oil through the catalyst is certainly not good for it.

    5. Member
      Join Date
      Oct 2nd, 2003
      Washington, D.C.
      2002 WRX 2.5L/6 Speed/Rotated GT30R
      10-04-2012 07:24 PM #5
      It's a Toyota, so another 100K or so. The compression numbers will eventually balance out.

    6. Banned roadtripper's Avatar
      Join Date
      Oct 22nd, 2003
      10-04-2012 07:28 PM #6
      only 825K to go. it's a toyota.

      (upon which time it will unintendedly accelerate itself into a ditch and explode. you have been warned.)

    7. Member
      Join Date
      Apr 26th, 2006
      Evolution IX
      10-04-2012 07:46 PM #7
      Thanks NumberSix. I figured that the numbers are so bad that it wasn't worth figuring out a root cause via leakdown, as the cost of engine repair/replacement would certainly not be worth it. So it sounds like compression numbers alone aren't enough to answer the question... I was wondering whether it was a matter of weeks, or months, or perhaps longer...

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