Roller lifter ID

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Jul 11, 2018 | 09:43 PM

Rick5.3

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Roller lifter ID

Ok so i bought a lm7 from the junkyard a year ago. the lifters in it look diffrent than the ones i have seen. Is this a stock lifter that gm used or are they aftermarket? they have 5g1 stamped on them and the only ones i can find that look like that are from howard cams or comp.

Jul 11, 2018 | 10:01 PM

Che70velle

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From: Dawsonville Ga.

I’ve found conflicting info on this subject in the past, but from what I’ve gathered, GM started using the ls7 lifter in all its engines in 09? I think. The lm7 was out of production in 07’, so the lifters you have are probably the pre-ls7 unit?

Jul 11, 2018 | 10:12 PM

Rick5.3

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the motor was out of an avalanche and it was drive by cable. im not sure the year i may have an old bearing i can look at and see.

Jul 11, 2018 | 10:27 PM

Rick5.3

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main and rod bearings say 8-01 on them.

Jul 11, 2018 | 10:28 PM

Rick5.3

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is there any way to tell if the cam is aftermarket at home?

Jul 11, 2018 | 10:57 PM

G Atsma

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Does it have a non-stock sounding idle?

Jul 11, 2018 | 11:20 PM

Rick5.3

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To be honest ive never heard it run. the block is at the machine shop getting cam bearings. the lifters have been sitting in a tuberware bowl full of atf for a year. i am rebuilding a lq4 for a 2500hd i just bought and just happened to.look at the lifters tonight.