ls2 bait

iTrader: (11)

aaaaaand 13k miles later i have an ls7 lifter take a ****. this is now the second time i have hada lifter failure with a gm lifter. first time my caddy lifters last 2k miles now my ls7 lasts 13k. and with the poorly designed valley of the ls motor the heads have to come off to get at a single lifter. may as well replace them all........again.

allngn_c5

iTrader: (3)

So what lifter do you think you'll go with this time ?? I used to use the comp R's in my 346, but LGM said the ls7's would be fine on my 402. Lets hope they last longer then yours did. I've got about 10,000 (mostly highway) miles on the motor. I'll let you know.

BTW, very sorry to hear the news. When did you find out? If you found out today, thats one hell of a way to start the new year

JMBLOWNWS6

iTrader: (17)

Sorry to hear about your lifter. I have used Morel lifters with great success. I had the GM lifters fail before

ls2 bait

iTrader: (11)

it happened 2 days ago. i fired it up to head home from work and heard it right away. it was fine on the way to work. i limped it home....which it drove exactly the same. no misfires or loss in oil pressure like when the caddy lifter went out but i kept it under 2k and went home and started checking things and number 3 exhaust had about 15 thousandths play in the rocker with the valves closed. and i have them set at .065 preload. i will likely use them again and just pray it was bad luck. for every lifter i have seen there has been negative press so i dont think any one is better then the other at this point.

Damian

iTrader: (89)

Some peoples' luck is just different. I've never had a lifter fail. I've put cams on stock lifters w/ 150,000 miles and had no problems.

The LS gods choose their people wisely I guess.

allngn_c5

iTrader: (3)

Got ya. I'll let you know if and when I have a failure. But lets hope that I don't have any failures. I've had enough major breaks and only one small failure. I'd like to enjoy a year of trouble free driving come Springtime up here in Michigan. Oil changes is about all I plan on doing unless I put a ton of miles on the car and then I'll change the tranny and rear diff fluid too. Premature maintenance is cheaper then premature failure. Best of luck with the lifter swap. Hopefully no more issues after that, good luck.

allngn_c5

iTrader: (3)

Damien, that is just mean bro. Laugh at the man during a minor setback.

Happy New Years to ya though.

99blancoSS

iTrader: (115)

You should see what happens when the wheel falls off them, it can take out the whole bottom end.

You've gone through 2 sets of GM lifters and are putting another set in?

http://estore.websitepros.com/212053...tegory=Lifters

In stock ready to ship. OEM lifters are not made to withstand the forces seen in a true hi performance engine. RPMS are a killer, its not ust about lobes and spring pressures.

elias_799

iTrader: (8)

one of my ls7 lifters started to bleed down a little after 6000km on my new motor. and i run 15w40 oil

JMBLOWNWS6

iTrader: (17)

This is true. I am just sharing with you I have had valvetrain problems in the past with the GM OEM lifters. And out of the last 5 motors I have done, The 3 with Morels didnt have any issues. Not to say it was luck, user error or experience just my .02 Good luck and hope you get it worked out.

ls2 bait

iTrader: (11)

gonna change the valve springs while i have the heads off. any idea what some pac duals would cost?

99blancoSS

iTrader: (115)

All depends on which ones, the 1521 or 1221. The 1521 is the nitrided endurance dual, but I would serioulsy look to putting in a set of Morels. A stuck plunger or semi collapse is one thing but when the wheel falls off the lifter (and they do I can post pictures of it), your going to be spending a lot more money to fix it. I'l post up a price on the springs.

sixt9er

iTrader: (2)

This is a good thread for information. I heard that GM lifters were ggreat for high performance applications. But I always here reference to the Caddy lifters being superior to the LS7 ones...hmmm...sorry to hear about your troubles and losses though, that sucks for sure...

allngn_c5

iTrader: (3)

https://www.vengeancerd.com/ecart/pr...raulic-Lifters

Any opinions on the CompR's ? I had great success with them in my old 346 h/c full bolt on setup.

99blancoSS

iTrader: (115)

Both of what you heard was false, the LS7 is a stock OEM lifter and is not a hi performance part. The Caddy ones are made for a specific use and this is not it from what we've seen from the failures on them.

Allnc5 as far as the Comp-R's they are more expensive but that's about it (IMO).
It comes down to material used. The Morel uses tool steel the other's don't so why pay more for the same basic thing.

allngn_c5

iTrader: (3)

Thanks for the explanation Chris. Its good that everyone is just trying to help. LS1tech is a pretty nice community to be part of when you need advice / help.

ls2 bait

iTrader: (11)

i had a wheel fall off a caddy lifter in my last motor. thats why i have this motor actually. i loved my car when it was head and cam.

i have heard bad things about morels also. doesnt mean i def wont use them but i have seen just as much bad press on every lifter except the caddys which flat out suck for these applications apparently.

99blancoSS

iTrader: (115)

What have you heard bad about the Morel?? We've seen a few packaged wrong but thats an easy fix.

02*C5

iTrader: (1)

Sorry to hear that bro not the way you want to start your new year.

Good Luck

GTO1_OHIO

iTrader: (3)

I just paid $284 shipped for the PAC 1221s ... and $515 for Morel lifters.

And like it was said the LS7 lifter was the stock lifter starting with the LS2 and is now the GM stock replacement for the LS1 too.