Worried about a purchase
#1
Worried about a purchase
I have a question. I’m looking to buy a 2009 rx8r3. The guy seems to know how to maintain the car. He says the body has 111k but has a new(ish) engine with 40k on it. Everything seems to be normal but when we talked about compression test all he said was 1 face on rear had a compression of 89 and that was the lowest number in the whole engine. Is that normal? And why did he not tell me all 6 numbers? Is it typical to only remember the lowest number? Also, should I be concerned about anything else? (Parts with original 111k miles going bad?) Or should I be concerned about the engine that’s in it now?
#2
What am I doing here?
Join Date: Mar 2006
Location: 2017 Miata RF Launch Edition
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No, a proper rotary compression test will yield at least 7 numbers, usually 8.
You should get 3 pressures for each rotor and 1 or 2 RPM numbers.
It sounds to me like he/they used a piston engine compression tester with the check valve removed.
If you like the car, offer to pay for a proper compression test at a Mazda dealer. If he agrees, meet him there or take it yourself and get the results directly from the service adviser.
You should get 3 pressures for each rotor and 1 or 2 RPM numbers.
It sounds to me like he/they used a piston engine compression tester with the check valve removed.
If you like the car, offer to pay for a proper compression test at a Mazda dealer. If he agrees, meet him there or take it yourself and get the results directly from the service adviser.
#4
What am I doing here?
Join Date: Mar 2006
Location: 2017 Miata RF Launch Edition
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Book rate should be 1 - 2 hour of labor. I don't know the shop labor costs in your area so I can't say for sure the exact price. You can call a dealer service department and ask them.
#6
Smoking turbo yay
$75 is probably from a rotary shop. $200 sounds like a Mazda dealer.
Even with the poor man's compression test, 89 psi is low, that's especially considering the S2's stronger starter.
Even with the poor man's compression test, 89 psi is low, that's especially considering the S2's stronger starter.
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