Finally Revealed Rod Knock 91 LT5 - ZR-1 Net Registry Forums

Torchred96 · 11-28-2015

I've had the short block sitting in my garage taking up space and was about to put it out by the bulk pick up. But before I did, I wanted to see what was causing that horrible knock. Took me a while with hand tools, but finally got the cradle off and surprising saw no obvious damage on the mains or in the cradle bearings. so, I started with the side I was pretty sure the damage was on...left front, and sure enough:

Turns out, #1 rod big end spun a bearing and mains have no obvious damage..in fact look perfect. I will post a picture in a little while, but I guess the block isn't going to the recycler now

I haven't checked 3-8 yet but #2 on the same journal looked fine.. The bearing does look thin..and the engine had about 135k miles and probably run for a long time with a hard miss due to the injectors before I got it so maybe a contributing factor?

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11-28-2015	#1
Torchred96 Join Date: Jul 2011 Location: Homestead, Fl Posts: 248	Finally Revealed Rod Knock 91 LT5 I've had the short block sitting in my garage taking up space and was about to put it out by the bulk pick up. But before I did, I wanted to see what was causing that horrible knock. Took me a while with hand tools, but finally got the cradle off and surprising saw no obvious damage on the mains or in the cradle bearings. so, I started with the side I was pretty sure the damage was on...left front, and sure enough: Turns out, #1 rod big end spun a bearing and mains have no obvious damage..in fact look perfect. I will post a picture in a little while, but I guess the block isn't going to the recycler now I haven't checked 3-8 yet but #2 on the same journal looked fine.. The bearing does look thin..and the engine had about 135k miles and probably run for a long time with a hard miss due to the injectors before I got it so maybe a contributing factor? . __________________ Sam 1991 ZR-1 :salute: Last edited by Torchred96; 11-29-2015 at 12:42 AM.