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Author Topic: Sealed Power Cam Bearing fitment.  (Read 42 times)

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Vegas Avy

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Sealed Power Cam Bearing fitment.
« on: May 23, 2020, 19:30:31 PM »

I drive a 2004 Chevy Avalanche base, 4x4, With the 5.3 LM7. I'm in the process of rebuilding the engine, and we just finished cleaning up all the parts and started to put the cam bearings in so we can finish cleaning the block, and after test fitting the cam with only two bearings in, It damn near seizes in place and becomes hard to even remove, let alone turn. So we mic'ed the old bearings to make sure they were the correct replacement (supposed to be direct replacement. No +/-) I noticed that the journals on the new cam bearings are 10 1000ths larger than the old cam bearings. New ones were .366, old were .356. I figure some of this can be due to the Crush from installing them, but .01 seems like a lot.

We could scrape the bearing down, but with as tight as they are, I don't want to remove too much of the Babbitt material and find myself in the same position of having to replace them again before I would If they fit. Is this a problem with Sealed power bearings? Do they run tight? I didnt get +/- because they werent spun, just worn, and I'm installing a new TSP 220r cam. But the cam journals are the same as stock, so I don't know what gives. Any advice? Is it normal and I just need to scrape them and not worry about it? Or should I try to exchange them before it's too late?

2004 Base 1500 4x4 (Non-clad)
Modifications: 6" Fabtech lift, 35" Cooper Discover STT Pros, 4.56 Eaton E-lockers front and back, Bilstien 5100s, Volant CAI, Corsa Cat-back, DDM HID Lows, Hi's, and Fogs, JL 1000w system wt Kenwood Excelon 7" deck.

On the way: TSP LT headers & ORY, TSP 220R cam, Rollmaster Single roller, Melling oil pump, E-fans, PRC Stage 2.5 LS6 Heads, Yank 3000 Converter, B&M trans cooler, ATI SuperDamper

Eventually: whipplecharger, brembo brakes
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