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Gtr - Compression Testing

GTR__34

By GTR__34,
in General Automotive Discussion

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Craved Grand Master

Craved

Posted
Posted

well it is a good way to judge the condition of the engine, the lower the comp reading the more worn the engine is, but then again, they could replace the rings and get the comp rating back up before selling...

so take it with a grain of salt, do a check to see what condition the motor at teh time of purchase .. rather than trying to use it as a guide, since there is no way to know that a 30,000 km car hasn't been absolutely thrashed without changing oil, fluids etc. motor could be just as worn as a 80,000 km engine that has been looked after a little.

James Mramor Explorer

James Mramor

Posted
Posted

another way is look at things that wear... like steering wheel, Pedals, the shift boot and hand brake boot. these are all high wear areas. So if the car says 30,000kms, but the rubber on the gas pedal looks like it is showing metal, then you know that the guy is lying.

Ask the guy about tires... how many sets of tires that he has put on the car, and the seats should give a good referance to how much the car has been driven.

In canada we are lucky.... you are not allowed to tamper with the dash AT ALL... if there is a light burned out , and the speedo has to be replaced you need to get a second mechanic to say YES this needs to be done... and EVERYTHING IS DOCUMENTED!

If you are caught tampering with teh dash AT ALL you get some major jail time!

ian Experienced

ian

Posted
Posted

And my suggestion (as discussed at length in a number of other posts) is to completely ignore the km's on the clock as 90%+ of the cars out there have them wound back.

So ignore it and concentrate on everything else, ie rust, seats, steering wheel, pedals, suspension, underneath condition, gearbox feel, is the clutch slipping, are the brake disks ok, etc etc...

Ian

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