Cam Bearing Tolerances
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From: Western WA
Cam Bearing Tolerances I'm installing an LPE gt2-3 cam (among other things) in my 2003 4.8, and I noticed the cam bearings are worn to copper on the passenger side, but still have the silver babbit on the driver side. A search of this forum and PT.NET as to whether this was excessive wear turned up a definite "maybe" 
, so I decided to buy a micrometer and measure them. Unfortunately I can't find the dimensions anywhere. The Helms manual lists the o.d. for the journals on the cam itself, but not the i.d. for the bearings. Anyone know what this should be? Thanks. 
, so I decided to buy a micrometer and measure them. Unfortunately I can't find the dimensions anywhere. The Helms manual lists the o.d. for the journals on the cam itself, but not the i.d. for the bearings. Anyone know what this should be? Thanks. Thread Starter
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From: Western WA
Originally Posted by willyfastz
Bore's in the block
1-5 2.327 - 2.329
2-4 2.317 - 2.319
3 2.307 - 2.309
cam journal 2.164 - 2.166
outa round .001
run out .002
1-5 2.327 - 2.329
2-4 2.317 - 2.319
3 2.307 - 2.309
cam journal 2.164 - 2.166
outa round .001
run out .002
Originally Posted by Lurius
Not going to be fun to replace those if the engines in the truck.
Originally Posted by JPH
copper=no good. you can diffently tell which the cam side loads in the motor. .002 i think.
Some LS engines have the copper look when new. It is not uncommon to see copper in small patches on these engines. It looks like they bored or reamed the bearings in place on some blocks, kinda like the old Mopar engines.
Kurt
Kurt
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From: Western WA
Originally Posted by 427
Some LS engines have the copper look when new. It is not uncommon to see copper in small patches on these engines. It looks like they bored or reamed the bearings in place on some blocks, kinda like the old Mopar engines.
Kurt
Kurt
), I'm not competent enough to do the job myself, and I don't trust any of the shops around here (they are all old-school SBC types). If it starts giving me problems later on, I'll deal with it then. Peace. Trending Topics
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