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Pampered-Z · 06-02-2008, 10:07 AM

How many miles are on them, if they have under 50-75K they are probably fine? You're not going to be using any big pressure springs, so stock lifters are fine.

If you want to replace them, go to a local autozone and get Melling lifters, same as OE without dealer price ( Autozone should be around $150 for all 16 ). Other option, people are having good results with the new Caddy racing lifters, although they are new so no real long term data on them yet.

Below is MY OPTION ( and that's all that it is, no hard facts ):
I'd suggest staying away from Morel, LS7 and Comp type R lifters. They are all good quality parts, but allot of people have various odd issues. Some people seem to be reporting problems with collapsing or not getting good oiling to the rockers and such with Morel and LS7s, I don't think is a manufacturing problem, I think it's because the stock LT1 pump just doesn't give enough oil pressure. The Comp R's have had problems in the past with broken retainer clips, and I think that is because people put too much lash into them, they are racing lifters and should only go 1/8 past 0 lash - that's how I run mine, but I also run a HP oil pump and heavier spring pressure.

OE lifters are fine, been using them with 306 and 847 cams with no problems at all.

06-02-2008, 10:07 AM	#30
Pampered-Z Sliderule / Moderator Join Date: Oct 2004 Location: Catawissa PA Posts: 2,294 iTrader: (1)	How many miles are on them, if they have under 50-75K they are probably fine? You're not going to be using any big pressure springs, so stock lifters are fine. If you want to replace them, go to a local autozone and get Melling lifters, same as OE without dealer price ( Autozone should be around $150 for all 16 ). Other option, people are having good results with the new Caddy racing lifters, although they are new so no real long term data on them yet. Below is MY OPTION ( and that's all that it is, no hard facts ): I'd suggest staying away from Morel, LS7 and Comp type R lifters. They are all good quality parts, but allot of people have various odd issues. Some people seem to be reporting problems with collapsing or not getting good oiling to the rockers and such with Morel and LS7s, I don't think is a manufacturing problem, I think it's because the stock LT1 pump just doesn't give enough oil pressure. The Comp R's have had problems in the past with broken retainer clips, and I think that is because people put too much lash into them, they are racing lifters and should only go 1/8 past 0 lash - that's how I run mine, but I also run a HP oil pump and heavier spring pressure. OE lifters are fine, been using them with 306 and 847 cams with no problems at all. __________________ 93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada 1) Build it 2) Race it 3) Break it 4) Repeat!!!