spessx

Hey Guys,
Has anyone ever had a blown motor covered by Honda? I've seen a lot of failed engines on this board and it seems they always diagnose it as an over-rev and deny coverage.
-Stephen

xviper

Yes, there have been several cases posted on this board of Honda rebuilding a motor on warranty.
They generally can tell if there was an over-rev, in which case, it is no surprise that they will deny.

spessx

Xviper,
Thanks for your answer! How can they tell if its been overreved? Electronics or by inspecting the disassembled motor?
-Stephen

xviper

I've been told by a local forum member who is also a top S2000 mechanic in Edmonton that the ECU logs the highest rpm reached. They can pull that out with ease. Also, an over-rev would likely show evidence of valve and piston top damage. With a single cylinder damage, you might suspect valve spring or retainer failure and this would be a warranty issue but damage to more than one cylinder is usually a dead give away.

efthimios

now does the ECU log the highest RPM reached "ever"...or maybe just before the motor failure?

xviper

I'm not an expert on this ECU but it's not hard to see how you can program any computer to store such information in its memory. You can tell it to store high and low numbers and even average numbers. There no limit to what you can tell a car's computer to do. Many ECUs can also tell you exactly what speed the car was going at the time an airbag goes off.

efthimios