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Old 03-03-2008, 02:28 AM   #1
greenspeed
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Location: Meadow Lakes, AK
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00 Impreza 2.5RS
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Question Blown rod on ej25d...anyone else have this happen?

I had a clear rod knock on my 98 legacy gt ej25d. So my buddy, his dad, and I started to tear things down to find out what was going on. Got it down to the heads expecting to see a cracked head gasket of some sort. There wasn't a thing wrong with the gaskets but it was apparent there was coolant in at least one of the cylinders, but more likely to be in two. Cylinders 1 and 3. They had a nice carbon build up around the center of the piston looking normal, but very clean around the outside.

Got the pan off and the oil was a little metalic on color and ther were some tiny chunks of bearing in the oil pan. Then started to spin it over by hand to figure out what bearing let lose. It turned out to be the number 3 cylinder. I just am puzzled along with everyone else...how the coolant got from the head down to the rod bearing with the heads not being warped and the car never over heating.

Mentioning all of this brings insight to another question...the number 4 cylinder had "rust" on the cylinder walls, just a dusting of what i want to call rust but am not entirely sure...the engine seemed to have been apart before...

This thread is useless with out pics so I will post some tomorrow after I get a ton of other stuff done...just wanted to share and I got another day to wait on parts...
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Old 03-03-2008, 10:35 PM   #2
DeMoe Aurelius
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Location: Corona like the beer!!!
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2005 Legacy GT 2.5
Atlantic Blue Pearl

Unhappy Blew my rod 3-01-08

I throw a rod also on my EJ18. Plenty of coolant in the tank but 1 quart of oil in the pan. And the color of sparking mud. It's crazy cause I changed it when I got the car. So I only put 1100 plus miles on the oil but under 1200. I checked the oil 3 days before in the parking lot at work so it made no sense that I blew the motor with 13700 miles on the clock.
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Old 03-04-2008, 01:38 PM   #3
greenspeed
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After talking to the dealer i guess its not uncommon for there to be seepage with no visual crack...
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Old 03-04-2008, 06:30 PM   #4
flstffxe
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Location: Coon Rapids, MN
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2008 Forester
Steel Silver

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I have broken a rod.




All I have to say is DO NOT BUY A CUMMINS REMAN shortblock from Subaru. The fun with the reman shortblock starts at post #24.
http://www.mnsubaru.com/forums/showthread.php?t=18158
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Old 03-04-2008, 07:14 PM   #5
RaceFaceXC
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those pictures make me cry inside.
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Old 03-04-2008, 07:22 PM   #6
flstffxe
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^^^Not to steal the ops thread, but right as it happened I pretty much went passed all the stages of denial, anger ..... right to acceptance. I more or less knew what had happened. Sad thing is it let go at about 2,500 - 3K rpm leaving a stop light in traffic. My failure was caused by a wristpin clip that came out of the piston followed by the wristpin walking out into the base of the cylinder wall bending the rod thus shattering the piston and so on.
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