53RUSSELL

iTrader: (9)

I have turbo 5.3 with 150k and I need to replace my stock lifter. They had started tapping so loud that I can hear them when I’m driving on the freeway, but my problem is doesn't do it unless it's a long drive or beat on the truck. I've check all the rockers and pushrods and they are good. I'm wanted to replace them with ls7 lifter. Will my harden 7.4 push rods still work with ls7 lifter. I hear that some people on ls1tech had to go to smaller push rods when running these. What head gasket are you guy's using in replacement of the stock one. Will need to have the heads milled before re-installing them?

Wilde Racing

iTrader: (26)

The LS7 lifter are now the stock replacement lifters. So from G.M you only have the LS7 and Caddy lifters to choose from. I'd stick with the factory MLS head gaskets, and it is always a good idea to have the heads milled a few thou just to ensure they are flat, Though this step is not necessary, just a good idea... Push rods should be fine as long as they are the correct length.

53RUSSELL

iTrader: (9)

Wilde Racing,
Do you know if the head bolts need to be replaces. I was looking throw the chillent and could find anything.

ZO6Ted

They do have to be replaced. Recommend ARP studs with the turbo but it's up to you. Good luck!

KySilverado

iTrader: (7)

Yes, they are torque to yield.

silver-mod-o

iTrader: (15)

I wouldn't bother with studding a 150K mile motor... Throw a new set of stock head bolts and gaskets in there, mill the heads .005" go back together with new lifters and run another 100+K....

1FastBrick

iTrader: (17)

Here you go.

#12575329 -4.8L/5.3L GM MLS Head Gasket SOLD AS A SINGLE

#12499225 -GM LS7 Lifter Pack of 16 to 7000 RPM This is the number for a package of 16

#12498545 -Should be a Head bolt Kit for 97-03 ONE HEAD YOU NEED 2 KITS


https://www.performancetrucks.net/fo...d.php?t=428941

Hope this helps...

53RUSSELL

iTrader: (9)

Thanks guys for all your help.

Bill Reid

iTrader: (14)

Have you tried a thicker oil? Hell, if the motor has 150k on it... try 20W-50 or a straight 30W.

Bill

53RUSSELL

iTrader: (9)

No I haven't tried thicker oil yet. I running 10w-30 or 40 can't remember. I was told that these engines didn't like thicker oil?