3rdCoastPowerSports

iTrader: (5)

can you resize crack cap rods? i have read that you can resize the stock crack cap connecting rods but it will never be correct. Can i just have my machine shop resize the rods so i can run undersized bearings or do i need to buy new rods?

95ONE

iTrader: (1)

You need to because?

farmington

iTrader: (14)

you can't resize the big end because when that is done, you machine .005 from the mating surface and then make the hole round again. This would destroy the mating surfaces of the cracked cap rods. Either make do with them as is, or buy new rods.

sepsis

iTrader: (7)

Cracked cap rods you mean? Geez.

A.R. Shale Targa

iTrader: (2)

I believe the fracture broke rods get the big end resized .002" larger without
cutting the mating surface like old school rods. Then Clevite makes bearings
to fit the oversized big-end bore. Probably a great time to upgrade the bolts
to ARP or Katech.

3rdCoastPowerSports

iTrader: (5)

Spun two rod bearings. Hmmm so no resizing cracked cap rods? Still kinda confused

Stumped1215

iTrader: (9)

I just ran into the same problem so I just bought scat i-beams for $310 from texas speed. By the time I put rod bolts in the stock rods I was better off buying them because they had the bolts and were already resized for them.

Steve - Race Eng

iTrader: (1)

If you spun the rod bearings, the rods are most likely junk especially if they are blue.

Cracked cap rods are not resized by the conventional method of grinding the parting lines to close up the vertical size then honing to spec. With a cracked cap rod you need bearings made over size so the rod bore can be honed to fit the over sized outside diameter bearing shells. In the case of the LS engines, that oversize is only .002" which is most likely going to be insufficient for a spun bearing rod housing bore to clean up. The .002" over sized bearings leave enough material to hone out of a rod housing bore to get a round bore (now .002" larger than a stock factory rod for use with these special bearings) to correct for distortion after installation of new rod bolts or for rods that are slightly out of round.

Steve

3rdCoastPowerSports

iTrader: (5)

cool thanks for the tips guys,,, looks like im going with the scat I beams, good price point. do i need new pistons for these rods or can i reuse my old pistons? if i cant reuse my old pistons i mind as well bore it .030" over instead of just doing the hone.

Stumped1215

iTrader: (9)

I believe you can get them in stock length if you call them, but I went ahead and got a cheep forged piston too. Mahle's with rings and pins for $580

*6.125 rod length is for aftermarket pistons. 6.098?(I think thats right) is for the stock pistons

chrisfrost

iTrader: (8)

The only thing with Clevites.002" oversized OD bearings is I don't believe they make them in any ID except standard ,,,,,,,,,,,,unless someone knows different but I do know that Federal Mogule has the oversized 1's in all the standard undersizes