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Old 11-08-2013, 04:14 PM   #1
Not My Subaru
Scooby Newbie
Member#: 373138
Join Date: Nov 2013
Location: Fort Lauderdale, FL
Default EJ25 normally aspirated, rod knock, newbie to Subaru

Hello everyone at NASIOC,

My wife recently talked me into taking a look at her friend's recently acquired '99 Legacy Outback with 208,000 miles because it has a loud engine knock. Taking a look at it has turned into me bringing it home, pulling the engine and doing a complete tear down. Engine has good compression on cylinders 1, 2 and 4 (175 psi). Cylinder 3 has 135 psi. After I separated the case, I saw that cylinder #3 had spun the rod bearing causing the low compression for that cylinder. I need to replace the crankshaft, one connecting rod, main bearings and rod bearings. The cylinder heads look brand new, they must have been replaced just before she got the car, old head gaskets were still in the back cargo area. The cylinder walls all have score marks from the pistons, it may be normal for all I know. My question is this, should I hone the cylinders and replace the pistons, hone and replace just the rings or leave it alone? This is my first Subaru rebuild, all advice is appreciated. Thank you.
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