what to do with a a motor with 210k miles and 175psi compression?

Information on the naturally-aspirated KA24E and KA24DE engines.
GuSpeed
Posts: 270
Joined: Wed Dec 24, 2003 4:35 pm

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So like the title says.. My car has 210,000 miles on it and I just did a compression test and on all 4 cylinders it says 175psi.

I bought the car at 100,000 miles and babied the car. What should I do now? rebuild it? What maintenance should I do? Should I turbo it? Or just all motor it?


Shabbernigdo
Posts: 693
Joined: Thu Jul 20, 2006 11:36 am

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if its still runnin 175 acrost all cylinders and runs good with no leaks etc etc then i dont see why a rebuild would be nessary.

imo ide leave it stock or turbo it.

Vegascorbin
Posts: 732
Joined: Sat Nov 24, 2007 9:56 am
Car: 1990 240sx dirt track race car

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GuSpeed wrote: What should I do now?
Keep babing it and run it until it won't any more.

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480sx
Posts: 4085
Joined: Sun Nov 12, 2006 5:27 pm
Car: 1996 Pearl White 240sx

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First of all, your crank, pistons and bores are in perfect shape. It would be worth pulling the motor and rebuilding it for sure. By 200k, your bearings are going to be worn to some degree, along with a long list of other things that will be worn.

I would re-ring it with OEM stock bore rings, and get a machine shop to hot tank and hone the block. Id also get a machine shop to redo your head and get it back to FSM spec.

In addition, all your seals, water pump, full timing chain set, things of that nature should be changed if they havnt already. You might want to replace your clutch while your at it.

If you do all this its quite possible to get another 200k out of the motor.

Granted, none of this is really needed. Eventually though, somethings going to fail. Be it you valve seals, or something as bad as a timing chain somethings going to give in the 200k+ range usually. Its preventative maintenance, an investment into the car really.

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spooled240
Posts: 6487
Joined: Sat Jan 20, 2007 8:45 pm
Car: kouki s14

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if it's a DE, then you can pass it over here

but 480 pretty much summed it all up...just keep baby'ing it and drive til it drops...ka-t? well that's just up to you!


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