MaDChevy95

Hey guys cranked my motor today after the full rebuild I installed the 212/218 comp low lift cam with new lifters when I cranked it it had some valve train noise I know the ls motor get a sewing machine noise to them but it doesn't sound normal...I used the hardened 7.4 push rods so preload should be good what do you guys think?

Vortec350ss

iTrader: (20)

Were the lifters soaking in oil? new lifters need to fill up when an engine is first started and they are always loud at first. How long did it run for?

WICKEDOWESIX

iTrader: (2)

^^^^ what he said. Are the lifters new or used low mile?

MaDChevy95

There new when I got them they were in little bags with oil then when I installed then I put some comp assembly lifter lube all in them and on rollers I let it run for about 20 minutes

MaDChevy95

I'm pumping 50psi op too

Vortec350ss

iTrader: (20)

Was it still ticking after 20 minutes? What I am referring to only lasts about 30 seconds max.

Did you install headers as well? Between headers and a cam install I can see how you would think something is wrong for sure.

I had headers on my old Tahoe, but this LQ9 of mine ticks way more than that did... I thought for sure I had a header leak at first.

MaDChevy95

Yeah I have headers too but no leaks I'm pretty sure.

MaDChevy95

I checked the timing too. I read somewhere that it goes away after about a week I put comp oil additive in and used Mobil 1 5w-30 too do you think I should try to thicken it up maybe the lifters haven't pumped up yet?

Vortec350ss

iTrader: (20)

Can you get a video of it?

MaDChevy95

Well I cranked it back up and all I hear now Is the slow sewing machine tick