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  #16 (permalink)  
Old 01-30-2013, 10:40 AM
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Thanks everyone for the input. I am going to my machinists after work to have him look at everything and make sure I am not missing anything. When I explained the issue to him he mentioned just lapping the thrust plate until the correct end play was established but we will see what he says after I show him all the parts.

,Shane

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Old 01-30-2013, 09:48 PM
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Today while cleaning up my nephew's engine which is a 1988 350 roller block and it's face is the classic high low arrangement. I'm not sure what year they changed it.
When I did my vortec build years ago Northern Auto Parts sent me a timing chain set in place of the Cloyes "Vortec" set as it was on back order and it was a Milodon double roller unit for OEM roller cam blocks. After installation was when I noticed it was making contact with the block. When I called back Northern the guy says "Says here not for VIN R" which is a Vortec block.
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Old 01-31-2013, 12:46 AM
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doesn't gm have 2 dfferent design thrust plates.. for the genI sbc
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Old 01-31-2013, 06:29 AM
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The plates are different only in the spacing of the bolt holes that attaches it to the block. The two do not interchange.
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Old 01-31-2013, 07:32 AM
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ok then how would you set the core plug depth in the rear of the block.. I'd think that matter (never rebuilt a roller block
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Old 01-31-2013, 04:33 PM
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IIRC in this case the plug hasn't been installed yet. It's installed same as a flat tappet block when the time comes. All the fore and aft movement of the cam is controlled by the relationship between the step on the cam nose, the depth of the recess in the cam gear, and the thickness of the retainer plate.
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Old 02-13-2013, 06:27 AM
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hey everyone, sorry I haven't been on in awhile to update but i have been pretty busy. After talking with my machinist he thinks that between the assembly lubricant and the low temperature it was causing the cam to not move easily. I took it home threw the plate in the parts washer and after letting the shop warm up for a couple hours I ended up with .007" of end play. Thanks for all the input and help everyone. Im glad this turned out not to be as big of a deal as I thought it was going to be.

Thanks
Shane
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