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'93 5.7 TBI, roller or non-roller?

lowflyer

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lowflyer Enthusiast

lowflyer

Posted
Posted

The TBI motor in a '93 5.7 (K1500,) is it a roller cam motor is it a flat tappet hyd cam motor?

 

Although this seems like a simple question, I've gotten conflicting answers from my machine shop guys and was wondering.

 

Thanks:)

americanmuscleman Enthusiast

americanmuscleman

Posted
Posted

TBI 350's don't have a roller cam. I've heard rumors that the 4-bolt main TBI 350's in the 3/4 ton and 1 tons could have come with a roller cam, but I doubt it. If its in a 1/2 ton, its a flat tappet hydraulic cam.

 

They are really easy to swap over to a hydraulic roller if you want to switch it. Thats whats in my truck.

  • 1 month later...
americanmuscleman Enthusiast

americanmuscleman

Posted
Posted

87' to 95' small block used hydraulic lifters, but they weren't roller lifters. I took mine out a few years ago and they were flat tappet lifters. I've helped a buddy rebuild a 92' TBI 350, and it also had a flat tappet cam. I know all the marine 350's up to 95' that Mercruiser built also had flat tappet cams (they used carb and TBI GM small blocks).

 

Maybe your thinking of the TPI 350. That did have a roller cam. The 87' to 92' TPI 350 had a roller cam in it, as did the LT1 and newer LS1.

 

The Vortec 350 in the C/K trucks, 96' to 99' had a roller cam in it.

 

:cheers:

  • 1 month later...

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