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Old 02-17-2009, 11:55 PM   #279
Scooby Specialist
Member#: 145145
Join Date: Apr 2007
Chapter/Region: MWSOC
Location: Rockford, Il
2006 wrx STi


Originally Posted by mvcsk8r View Post
I split the block tonight to find that the rod bearing on 2 and 3 were both intact but lots of play. they look as though they were squeezed from the middle out, if that makes sense. Does that sound like a detonation problem or lack of oil? It is a OEM short block so I have no idea what the tolerances were. I am doing the work this time so I will be sure to rule that out for the next failure. When I had it tuned at Dent sport, I had them advance the timing slightly to avoid detonation. I'm not going to pretend I know what I'm doing but I assume most of you do. There must be a reasonable set up to combat this issue. 1250 for a crank isn't bad considering short block replacement at 2100 all said and done. does it make sense to clearance the rods to .002 but keep the mains tight? Should the rods and crank be replaced or just turned? I'm basically trying to keep this build under 2k. What mods are most important?
Squeezing suggests the tremendous forces applied during detonation. An oiling issue would manifest as scoring and or excessive wear, not a crushing and or squeezing type of damage. And advancing timing is the exact opposite of what you want to do if avoiding detonation is your goal, FYI.
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