Valve springs
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Heel & Toe
Joined: May 2016
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From: Boynton Beach Florida
Valve springs
Does anyone know if the 2004 Z06's have the same valve spring issue as the 2002-2003 models? I have a Z-16 with 43K and I don't want to take any chances. I have heard that GM rectified the problem in 2004 but don't know if that's true.
Le Mans Master
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From: Kelowna BC
Look at the sticky, top of Z forum. There are perhaps 2-3 recorded failures for 04. I bought new springs and seals for mine anyway... will eventually actually install them I think (along with my dusty LMC5).
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Btw, I just noticed you're in BB. That's where my son lives as well. Small world.
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if you decide to do the springs a rocker trunion upgrade would be worth the extra $120 or so in my opinion since the rockers will be off anyway
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These are the way to go now:
http://www.straubtechnologies.com/ls...trunnion-kits/
Le Mans Master
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Good idea, and forget Comp.
These are the way to go now:
http://www.straubtechnologies.com/ls...trunnion-kits/
These are the way to go now:
http://www.straubtechnologies.com/ls...trunnion-kits/
Team Owner
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
You might do yourself a favor and remove a couple random RAs, and disassemble and inspect the underside of the trunnion body. You may not like what you find.
HTH
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I have heard of the snap rings breaking but haven't heard anything about the trunion itself failing... I really haven't been on ls1tech much since joining here and I probably should, there is a lot more info on that forum... next time I change my oil I might just pop them off and look, the way my car is setup I could have them off in a few mins lol... do you have a link or pics of what to look for?
... I really haven't been on ls1tech much since joining here and I probably should, there is a lot more info on that forum... next time I change my oil I might just pop them off and look, the way my car is setup I could have them off in a few mins lol... do you have a link or pics of what to look for?
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
I have heard of the snap rings breaking but haven't heard anything about the trunion itself failing... I really haven't been on ls1tech much since joining here and I probably should, there is a lot more info on that forum... next time I change my oil I might just pop them off and look, the way my car is setup I could have them off in a few mins lol... do you have a link or pics of what to look for?
... I really haven't been on ls1tech much since joining here and I probably should, there is a lot more info on that forum... next time I change my oil I might just pop them off and look, the way my car is setup I could have them off in a few mins lol... do you have a link or pics of what to look for?Chris' trunnion kits are new to the marketplace and they began shipping in Feb I think (~) AND they are US made. Martin (formerly with Tick) Smallwood is just one of the people big on these so far. I have a set installed as well. Easy to do.
http://ls1tech.com/forums/generation...nion-kits.html
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holy chit
... yeah if mine look like that they are coming right the F out
... I have some vacation time coming up in a week and that would give me something to do, I might just go ahead and order a set
... yeah if mine look like that they are coming right the F out... I have some vacation time coming up in a week and that would give me something to do, I might just go ahead and order a set
Le Mans Master
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I was SURE you had seen SO many post from Bill about the trunions is why I put that... maybe you hadn't? Hope yours are OK
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I don't recall him saying anything that specific about them, not saying he hasn't I just don't remember reading it... after looking at the pics in the thread lonestar posted and me knowing how I drive my car then I'm sure they look similar... I'm probably just going to order a set and do it regardless, I don't want to risk anything failing over a $150 part
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Just give them a call direct. Their prices are the same as their dealers. Tim will probably be the one to take your order. You'll have them in a couple days. Btw, that was me in the LS1tech thread that pointed out to Chris about the LS7 bolts being shorter. They changed their website info as a result.
Last edited by LoneStarFRC; Jun 28, 2016 at 12:49 AM.
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I looked into this several years ago, when the problem first came to light. HOWEVER, it seems that the Z06 engines were the ones initially having issues with the bad trunions, not the "regular" LS engines. But I installed a set of the Comp trunions in my car, anyway.
I did look into the CHE bushings, but they weren't offered as a kit, at the time, and CHE wanted $400 to do the conversion on customer supplied rockers. I was hesitant to spend that kind of money for something that might have been, at the time, overkill for my needs.
The problem, as I see it, is that the LS engines all seem to have that "sewing machine sound" as normal, so it's difficult to determine if something has gone amiss........
Team Owner
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From: Dear Karma, I have a list of people you missed.
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Btw, I'm speaking about the Comp Cams "upgraded" version here, not any OE pieces. It's the Comp pieces that are failing.
Le Mans Master
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I don't recall him saying anything that specific about them, not saying he hasn't I just don't remember reading it... after looking at the pics in the thread lonestar posted and me knowing how I drive my car then I'm sure they look similar... I'm probably just going to order a set and do it regardless, I don't want to risk anything failing over a $150 part
I had never even heard of them and had no idea what they were until I joined the C5 forum...
The only roller motor I have ever had is our full roller 427, but it's all old school and a totally different beast....
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I think you'll like them. Super easy to install. Just give them a call direct. Their prices are the same as their dealers. Tim will probably be the one to take your order. You'll have them in a couple days.
Btw, that was me in the LS1tech thread that pointed out to Chris about the LS7 bolts being shorter. They changed their website info as a result.
Just give them a call direct. Their prices are the same as their dealers. Tim will probably be the one to take your order. You'll have them in a couple days. Btw, that was me in the LS1tech thread that pointed out to Chris about the LS7 bolts being shorter. They changed their website info as a result.
Yeah, he's got in my head. About every post that I've seen about valve issues he mentions trunion upgrades...
I had never even heard of them and had no idea what they were until I joined the C5 forum...
The only roller motor I have ever had is our full roller 427, but it's all old school and a totally different beast....
I had never even heard of them and had no idea what they were until I joined the C5 forum...
The only roller motor I have ever had is our full roller 427, but it's all old school and a totally different beast....
