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Old 07-19-2008, 10:06 PM   #1
Scooby Specialist
Member#: 80465
Join Date: Jan 2005
Chapter/Region: RMIC
Location: Bailey, CO
2001 2.5RS
Black Diamond Pearl

Default #4 rod bearing is toast

Been reading for a while, thought I'd share. About a year ago, I'd hear a rattling at certain rpm/throttle, thought it was my skid plate hitting the headers. Once I got around to taking it off, my rattling didn't stop. It wasn't much at first, just annoying. After a few months it would get worse, happen upon startup for about half a second, then go away until about 3K rpms where it would come back under certain loads.

Fast forward to october 07 and it would get to the point of rattling at idle, but only when warmed up. So I finally figured it out and built up a spare short block and swapped it out last weekend. Here is the aftermath:

all other bearings look fine and normal wear for 90K miles, but #4 was the culprit. I chalk it up to abuse, autox, rallyx, and possible low oil due to waiting too long between changes. Either way, new block sounds fine after 100 miles and 1st oil change, I'll try to take better care of this one. This bearing lasted about 10K miles.
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Old 07-21-2008, 06:39 PM   #2
Scooby Newbie
Member#: 180948
Join Date: May 2008
Location: Denver
2008 Impreza 2.5i
Obsidian Black Pearl


well there's your problem!!
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