Comp R's
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Joined: Oct 1998
Posts: 3,144
From: Jackstandican
Registered User
Joined: Aug 2006
Posts: 27
well i can add to problems with this mine messed up in less then 100 miles. i set zerq lash then went 1/8 th turn more like they said. well i drove to the insurance friday and it felt like i was loosing power i barely pulled on a grand cherokee with 4.7. then left insurance car was not responding to the throttle. car didnt want to idle right or rev. pulled the intake and found busted clips. trying to clean everything back up and try to but my car back together. motor is a 383 lt1 splayed 4 bolt, forged, 12:1 compression ,cc468 cam, 7/16 rocker studs, le3 heads, gmp timing set, 58 mm tb, 44lb injectors, fuel regulator, electric water pump, lt's, 3"ory, msd wires and coil, crane fireball ignition. i checked with comp on settings before install and now im having to tear apart again because they fell apart.
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Joined: Apr 2003
Posts: 316
From: Idaho Falls, Idaho
Heres another one, older LE2 setup with 987 springs.. it span a cam bearing, not really a surprise after 15,000 fun filled miles on an 80k stock shortblock. Upon teardown one of the lifters had lost its clip, one piece in the valley and one in the pan.
No idea how long it ran with it like that, there was really no sign, no loss of power, no noise etc.. This was on a very carefully assembled and lashed valvetrain, regardless on the debate on why this happens I would never use them again.
No idea how long it ran with it like that, there was really no sign, no loss of power, no noise etc.. This was on a very carefully assembled and lashed valvetrain, regardless on the debate on why this happens I would never use them again.
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Joined: Sep 2000
Posts: 574
From: Stillwater Ok USA
Basically the 'jist' of this thread is. You must be absolutely perfect in your valve lash adjustment or these lifters are going to break. **OR** you can buy a better quality lifter and if you are off just a tad, you will be fine. I fall into the second category. I think I'll buy a better lifter personally.
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Joined: Aug 2005
Posts: 4,405
From: Kantuckee Yo'
Basically the 'jist' of this thread is. You must be absolutely perfect in your valve lash adjustment or these lifters are going to break. **OR** you can buy a better quality lifter and if you are off just a tad, you will be fine. I fall into the second category. I think I'll buy a better lifter personally.
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Joined: May 2006
Posts: 292
Took my manifold off today, and all lifters were good. I had pre loaded them cold originally, then adjusted them while running, barely turning them past clicking noise going away.
I am doing some work on her out of the car, and I will cold pre-load them per CompCams recommendations. Then I will re run her for a while, and see how she is. I think it is easy to over pre load them.
I did notice how the new retainer design is. Looks cheap. But how many people really have had issues with them. Hopefully I wont.
I am doing some work on her out of the car, and I will cold pre-load them per CompCams recommendations. Then I will re run her for a while, and see how she is. I think it is easy to over pre load them.
I did notice how the new retainer design is. Looks cheap. But how many people really have had issues with them. Hopefully I wont.
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Joined: May 2006
Posts: 292
Can the old and new lifters be taken apart? Reason I ask is, I have old ones (the good ones), and if I were to take them apart, what things besides the retainers would be different?
Last edited by RACEON; Jul 15, 2008 at 01:18 PM.
