Lifter behavior calling for head removal?
I hope you get it figured out. Ive got a problematic situation of my own. Since my engine has been done back in '14, I've had a lifter "tick"(?), I think, in my LS7 that goes away after totally warming up, maybe 10 minutes of running. I pulled the heads to have new guides installed, along with a valve job and new Ferrea intakes. I installed new lifters and trays "while I was in there," and thought it would go away. Thought WRONG!!! Damn thing still does it!! Originally thought it was a piston slap, but I've experienced those on my stock LS1, and they never took 10 minutes to quiet down. Maybe 1 minute. Since motor has 43,000 miles, and 9 years on it now, I guess it's more of an annoyance than worrisome. But I feel your pain. It'll get sold when I croak, but that damn tick won't help the sale any, for sure...
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TECH Apprentice
Joined: Jan 2023
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From: Corpus Christi, TX
I hear ya I know you could hear my little girl frustration I'm ready to hit it with my purse. And I'm at that crossroad right now. Proper head gaskets better lifters and possibly springs but with this cam the blue ls6 would be great but the lift on this ls7 cam is right over the suggested .550 for those blue ls6 I think I got it right. Or what's the next step up? I prefer summit
Thread Starter
TECH Apprentice
Joined: Jan 2023
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From: Corpus Christi, TX
I hope you get it figured out. Ive got a problematic situation of my own. Since my engine has been done back in '14, I've had a lifter "tick"(?), I think, in my LS7 that goes away after totally warming up, maybe 10 minutes of running. I pulled the heads to have new guides installed, along with a valve job and new Ferrea intakes. I installed new lifters and trays "while I was in there," and thought it would go away. Thought WRONG!!! Damn thing still does it!! Originally thought it was a piston slap, but I've experienced those on my stock LS1, and they never took 10 minutes to quiet down. Maybe 1 minute. Since motor has 43,000 miles, and 9 years on it now, I guess it's more of an annoyance than worrisome. But I feel your pain. It'll get sold when I croak, but that damn tick won't help the sale any, for sure...
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Hi there, when you spoke about a new thread....we do think it's time for a bit of a reset. Knowing what you know now plus taking a look at every component. The LS7 cam has a 51 degree intake closing point compared to most of our truck stuff in the 33 degree range average. Is it too late to talk you into a smaller .550 lift truck cam that fits your combo and your needs? We're not really trying to sell you anything, just want you to be happy with how things turn out.
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I hear ya I know you could hear my little girl frustration I'm ready to hit it with my purse. And I'm at that crossroad right now. Proper head gaskets better lifters and possibly springs but with this cam the blue ls6 would be great but the lift on this ls7 cam is right over the suggested .550 for those blue ls6 I think I got it right. Or what's the next step up? I prefer summit
Thread Starter
TECH Apprentice
Joined: Jan 2023
Posts: 340
Likes: 47
From: Corpus Christi, TX
I hope you get it figured out. Ive got a problematic situation of my own. Since my engine has been done back in '14, I've had a lifter "tick"(?), I think, in my LS7 that goes away after totally warming up, maybe 10 minutes of running. I pulled the heads to have new guides installed, along with a valve job and new Ferrea intakes. I installed new lifters and trays "while I was in there," and thought it would go away. Thought WRONG!!! Damn thing still does it!! Originally thought it was a piston slap, but I've experienced those on my stock LS1, and they never took 10 minutes to quiet down. Maybe 1 minute. Since motor has 43,000 miles, and 9 years on it now, I guess it's more of an annoyance than worrisome. But I feel your pain. It'll get sold when I croak, but that damn tick won't help the sale any, for sure...
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From: Corpus Christi, TX
I looked around for those .570's not sure who I'm supposed to get them from though I even added ls7 not popping up I'll keep searching
https://ratedrmotorsports.com/products/btr-ls6-style-beehive-560-lift-valve-spring-set-1
These don't look bad maybe no ls7 springs selling right now or I don't know where to look but I don't trust any sellers unless someone tells me
https://ratedrmotorsports.com/products/btr-ls6-style-beehive-560-lift-valve-spring-set-1
These don't look bad maybe no ls7 springs selling right now or I don't know where to look but I don't trust any sellers unless someone tells me
Last edited by Guy with a Chevy; Feb 10, 2023 at 03:14 PM.
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OP,
Our SUM-174004 .600" lift beehives would be a good fit here. They'll work with your stock retainers, keepers, and seals.
Regarding head gaskets. For replacement MLS gaskets see the GM NAL-12610046. These have a .051" compressed thickness and would provide around a 10.4:1 compression ratio. If you wanted a compression bump check out the Cometic CGT-C5489-040. These are .040" thick and provide .2-.3 points of a compression bump compared to the .051" head gaskets. With the .040" head gaskets you'd be around 10.7:1 compression. The added benefit is reducing the quench distance which helps promote a more efficient combustion cycle and reduce the chance of detonation.
Our SUM-174004 .600" lift beehives would be a good fit here. They'll work with your stock retainers, keepers, and seals.
Regarding head gaskets. For replacement MLS gaskets see the GM NAL-12610046. These have a .051" compressed thickness and would provide around a 10.4:1 compression ratio. If you wanted a compression bump check out the Cometic CGT-C5489-040. These are .040" thick and provide .2-.3 points of a compression bump compared to the .051" head gaskets. With the .040" head gaskets you'd be around 10.7:1 compression. The added benefit is reducing the quench distance which helps promote a more efficient combustion cycle and reduce the chance of detonation.
I hear ya I know you could hear my little girl frustration I'm ready to hit it with my purse. And I'm at that crossroad right now. Proper head gaskets better lifters and possibly springs but with this cam the blue ls6 would be great but the lift on this ls7 cam is right over the suggested .550 for those blue ls6 I think I got it right. Or what's the next step up? I prefer summit
Thread Starter
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Joined: Jan 2023
Posts: 340
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From: Corpus Christi, TX
Well from my point of view you should be finding the gasket that suits the piston size. Thankyou grinder for sharing lol I also have to ask is it possible I ruined my lifters running without oil pressure for a brief idle? I'm confident this block is good to go I just need to get the valvetrain right. As for summit almost everything I needed showed up today ☺️
Thread Starter
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From: Corpus Christi, TX
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Joined: Jun 2019
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Thread Starter
TECH Apprentice
Joined: Jan 2023
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From: Corpus Christi, TX
Those head gaskets are not the right ones for an L76. They are for a 5.7L engine maximum, which has a bore of 3.89 in. Your engine has a 4.00 in. bore, but with rectangle port heads the combustion chamber is actually larger than the cylinder bore and requires a head gasket for a 6.2L. The stock head gaskets for that engine should say 6.0/6.2L on them. There are some that just say 6.0, which have a smaller bore and are used on a 6.0 with cathedral port heads like an LS2 or LQ4. With the head gaskets in the picture, the gasket would actually be overhanging the bore, and the piston may be hitting the gasket every time it gets to TDC as they typically come out of the hole by 0.005 in. give or take a little bit.
Mad shout out to you for being right . Wrong gaskets was the causing all the noise. Nice tuned cammed block now barely even opened it up having transmisson problems for the last week just been lazy. TY if i wouldnt have checked my measurements a second time finding the gaskets were really 3.922 on the bore not 3.92 thats what i get for reading it upside down idk what i was doing ty again anyone know where i can use my GI Bill to go to hands on school for this i will move