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Alan Roehrich · 03-25-2011, 08:17 AM

Darren, that's a common Olds 455 problem. The block is weak there, and that main saddle moves. The way to solve it is to have the align bore finished at the minimum spec, put the bearings in (the ones you want to use) measure the ID of the bearing with the cap torqued. Then subtract 0.0035", and that is the diameter you want the crank journal. I know some guys are running 0.004" on the mains.

I've been talking to King about making some better rod main bearings, and I'm told the project is being considered.

03-25-2011, 08:17 AM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,098 Likes: 1,546 Liked 1,777 Times in 404 Posts	Re: Main bearing crush Darren, that's a common Olds 455 problem. The block is weak there, and that main saddle moves. The way to solve it is to have the align bore finished at the minimum spec, put the bearings in (the ones you want to use) measure the ID of the bearing with the cap torqued. Then subtract 0.0035", and that is the diameter you want the crank journal. I know some guys are running 0.004" on the mains. I've been talking to King about making some better rod main bearings, and I'm told the project is being considered. __________________ Alan Roehrich 212A G/S