Compression test needed for 2009 still under warranty?
#3
My thinking was basically, the compression test can tell me only the current state of the engine, and since it's covered by Mazda for 2 more years, it just doesn't seem that important. If it's bad, great, I get a new engine. If the compression is good, great, the engine should be good for a little while longer, but it's no guarantee that the engine will pass a compression test next year or the year after.
The current owner had the compression tested a few months ago, see pic below. I know it "passed", but the 7.4 and the 7.5 lead me to believe it just barely passed. Elevation was 745 ft, and I will admit that I don't know much about compression tests.
Any advice or help interpreting the results would be appreciated. Thanks!
Last edited by powderedtoast; 12-31-2015 at 03:25 PM.
#4
well, I bought my 2009 Dec 4 2015, started/drove/ran great, it's at the dealer waiting new engine now, because I had the test done and it was marginally failing.
Hindsight being 20/20, here is what I would do:
- Enjoy it. Maintain it. drive the heck out of it.
- take for compression test say 2mo (or 2k miles) before warranty expires. cross that bridge then.
The reason I say this is because I've heard stories of babied S2's which just needed a good 'whippin', such as a track day or 3. I suspect mine is fine, just carbon'd up, though I've not yet seen the test data.
fyi my local dealer is $120 for compression test and rather complete inspection.
Hindsight being 20/20, here is what I would do:
- Enjoy it. Maintain it. drive the heck out of it.
- take for compression test say 2mo (or 2k miles) before warranty expires. cross that bridge then.
The reason I say this is because I've heard stories of babied S2's which just needed a good 'whippin', such as a track day or 3. I suspect mine is fine, just carbon'd up, though I've not yet seen the test data.
fyi my local dealer is $120 for compression test and rather complete inspection.
#6
That's a good question. I think I would still want it. Is there any real downside to a failed and replaced engine?
#8
#9
Eg 250rpm and 108psi (7.6kg/cm2, 7.4bar, 744kpa) get 7.80. But 7.80 what? It's on the lighter green, but still a good number, but whats the unit of measure for the 7.80?
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