Should I get a compression test before buying? (unusual circumstances)

jeudi 15 janvier 2015

I've been reading up on here and have seen the recommendations to have a compression test done before buying, so I decided that was definitely something I wanted to do before buying. With the car I'm looking at getting, I'm starting to think that may not be such a great idea after all given the circumstances.



Here's the thing. He lives a few hours from me so tomorrow morning, I was going to call up the local dealership, prepay for the test and have him take the car there, and the dealership will e-mail me the results. I'll drive down there tomorrow evening after work and if the car is as described, we'll go to my bank Saturday and finish the deal. I would have preferred to be there in person for the test, but my bank closes early on Saturday and the dealership only has an oil change guy there that day.



Here's the reason I'm having second thoughts. The car is an 09 with 27,000 miles on it. From what I've read on here, the second generation engines are more reliable than the first generation ones so I figure there's little chance that it's bad. It's also my understanding that all of these cars have 8 year warranties, so I should still be covered for about two years. However, he has removed the catalytic converters and done a few minor mods under the hood. If he takes it to the Mazda dealership, they're likely to record that and use it to get out of covering any issues that are remotely related to those mods. In case something did break, he said he still has most of the original parts which I could put back on, though I haven't yet asked about the exhaust specifically. It's also kind of a small city and I don't think they have any non-dealership shops that could do a rotary compression test.



So is it worth it to do the test? The engine is by far the thing I'm most worried about having issues with. Sensors and such are far far cheaper than a rebuild and I can do the work myself. Having the test done will pretty much ensure that the engine won't give me issues in the near future, but not having it done will pretty much ensure that I could have it fixed if it does, albeit after the pain of having to install the original parts. I hate to be impatient, but I'm going to need some advice within the next 12 hours or so. Thanks.




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