Posted By: jafr
Aluminum block Main clearance - 04/28/14 02:28 AM
What are you guys running for main bearing clearance with an Indy Max aluminum block?
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It is an aluminum block. It does expand, no? I would think you would want a little under .003 cold if anything. Just my 2 cents.
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It is an aluminum block. It does expand, no? I would think you would want a little under .003 cold if anything. Just my 2 cents.
But it expands in all directions... not just inward
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Thanks, guys. I was shooting for .0035 on the mains and the most I could get was .0028 with a speed-pro M-119 bearing. I can tell you from experience it didn't like the clearance that tight, 1 pass and I found metal in the filter. I pulled the motor before any major damage occurred and found the metal was coming from #4 main.
I am going to take the block and crank to the machine shop and have the mains and crank checked. I hate to turn the crank to get an extra .0007 clearance. We shall see what the machine shop has to say.