| What would the guru's do? - rod bearing issues... |
Subject: What would the guru's do? - rod bearing issues... by djxib on 2010/11/22 20:05:14 A brief history: 1992 LT1 with LT4 heads, supercharged, CNC'ed and ported. A tapping at idle developed which gradually got louder. It was subsequently determined to be a failed cam lobe (#6 intake). No evidence of knocking, and good oil pressure. As I disassembled the motor, no other problems have been found (except below) and everything looks clean. While I have the heads off, I decided to pop the pistons to replace the low tension oil rings to fix my oil consumption issues. I checked all the rod ends and everything seems really tight and solid. However I am seeing discoloration on the rod bearings, although they are very smooth, not scored and the crank journals are bright and shiny. I'm thinking that I will measure existing clearances with plastigauge and then decide on simply to replace the bearings or maybe go under/oversize by .001 or .002 depending what I find when I measure the clearances. I am on a limited budget until next summer when I probably plan to drop a crate motor into the car, and the car is not my DD, so I am not necessarily looking for a 50,000 mile fix. See attached picture for the view of #6 and associated bearings.. What would the guru's do? |
