onedown

I'm gonna have my lm7 bored to stock ls1 3.898 bore
going to keep 5.3 heads and rotating assembly exept pistons will be http://www.jegs.com/i/Mahle/644/LS1340898F04/10002/-1

I wanna drop my short block off have it bored and then put back to gather by the shop. new main and rod bearing, cam, rotating assembly, ect.

I want to have all or most of the parts ready to go when I take it there, so far I have the stock 5.3 and new pistons.

I assume 5.3 and ls1 use same rod and main bearings?
also I have to get a new head gasket to match the new bore, would any ls1 replacment work, as long as it's not smaller then 3.898 of course. like http://www.texas-speed.com/p-182-com...3910-bore.aspx

what other parts would you recommend having replace while the motor is apart?

onedown

I was advised to get new rods, I'm not very familiar with engine internals, if I'm using
Bore: 3.898''
Pin Diameter: .945''
-4cc Dome Volume
pistons, and stock 5.3 heads would 6.125" rods be fine?

Also Would changing main and rod bearings be advisable? and would stock replacements work?

mark21742

If there are any miles on an engine and I have it opened I like to go ahead and put fresh bearings in just for peice of mind...have the shop check the crank and rods to be sure they don't need to be turned, then have the shop get the correct bearings and install them....your stock crank and rods should work fine, ss long as they are ls1 replacement pistons

mark21742

You will need to get headgaskets to match the new bigger bore also, and the shop should use a torque plate when they bore/ hone your block....iron blocks aren't as important to use the torque plate as aluminum blocks, but it can still make a difference

RezinTexas

Cam bearings are different size. 1898M is the part number you want.

onedown

Yea I got cometic gaskets that will fit the bigger bore. Thanks for the info.

lemkerailroad

torque plate
torque plate
torque plate

yes they need to use a plate,
all the gen III iron blocks need to use a plate
trust me I found out the hard way

onedown

got some parts in,

Eagle 6.100 forged rods



Mahle Forged pistons



Cometic Head Gasket

chrisfrost

iTrader: (8)

Cam bearings are different size compared to ? Each other ,,,,,,,,yes ,,,,,,,,,LS1's and LM7's use the same cam bearing sets ,,,,,,,,,,,,

RezinTexas

no, LM7 uses 1898M, LS1 uses 1888M.

I first bought an LS1 set, and they didn't fit. The bores in the LM7 block were bigger.