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Old 11-17-2012, 10:22 PM   #1
Blase M
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Join Date: Apr 2005
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Location: chicagoland IL
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2000 impreza rs
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Default Used motor maintenance

I'm dropping in a used ej251 with about 120,000 mi on the clock to replace a blown motor in my 00 rs. I plan on replacing the t-belt, tensioner, water pump, thermostat, and maybe the oil pump before the motor goes in.

Am I'm missing anything? It looks like it has new head gaskets. I'll be inspecting the plugs & wires, PCV valve and other components but as far as I know they're relatively new too.
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Old 11-18-2012, 11:31 AM   #2
Elbert Bass
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I would run a cylinder leakdown test and make sure the exhaust valve guides were not migrating before I dropped it in. I realize the engine would be cold and you wont get a "perfect" test, but it would at least let you know if you had a burnt valve, piston, or bad rings.
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Old 11-18-2012, 12:18 PM   #3
Back Road Runner
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dito. With that amount of time on the engine, it is worn. It will run, but it's also worn. A refresh may be needed. Minimally this might be some light cylinder work, new seals and gaskets, and inspection of the valves and such. More significantly, you would effectively tear down, get everything cleaned, and rebuild the engine. This would be around $1500 in parts + whatever labor rates you manage to find. $3k to $4k is normal, but in the end you will have a brand new motor that will easily last another 100k plus with zero fuss. All you will need to do is change oil and drive the car for the next 5-10 years.
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Old 11-18-2012, 06:05 PM   #4
Blase M
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Thanks for the input. A leak down is in order. A rebuild is out of the question, even if it will extend the life of the motor for good long while. My RS is a salvage car, and although I love it, I can't justify spending more on repairing the car than what it's worth.
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Old 11-19-2012, 03:54 AM   #5
subi400
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Quote:
Originally Posted by Blase M View Post
Thanks for the input. A leak down is in order. A rebuild is out of the question, even if it will extend the life of the motor for good long while. My RS is a salvage car, and although I love it, I can't justify spending more on repairing the car than what it's worth.
What happened to the engine in your car that you are replacing? Broken timing belt due to seized timing belt pulley? Blown head gasket? Or was it a spun bearing due to too low of oil, the wrong oil used or both? I keep seeing way too many subaru ej25 or ej22 engines blown up..... there is like a pandemic going on here

But, rotate the crank a few times to see how it does, then maybe take off the pan while you redo maybe the head gaskets and check the rods to see if any are loose? Then, bolt back together and go.
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Old 11-20-2012, 12:27 PM   #6
srikid
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My engine sounds like its on its way out. Crazy loud knocking sound. any ideas?
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