[Z06] Stage II LS7 cylinder heads - A visual guide to valve guide wear and CNC upgrades
07-02-2013, 01:27 PM
#301
Not everything in life makes perfect sense or stands up to scientific/engineering disciplines.
Yesterday I had a patient who had numerous previous cavities that were already filled. In addition he had 4 new cavities. Guess what, they were ALL on the LEFT side of his mouth. He had NO cavities or fillings, just perfect teeth on the right side of his mouth.
DH
Yesterday I had a patient who had numerous previous cavities that were already filled. In addition he had 4 new cavities. Guess what, they were ALL on the LEFT side of his mouth. He had NO cavities or fillings, just perfect teeth on the right side of his mouth.
DH
07-02-2013, 01:35 PM
#302
Race Director
I agree Frank. If you look above at my statement it is basically saying that all people have to do is have WCCH swap their guides to bronze to mimic our success, that is based on the data. This is a way to help folks with what we know and not bother arguing what we don't know over and over. It's actually opinion from there on out for each to decide, not have decided by them from the loudest people in the room.
There is absolutely no need for these endless pages on the actual valves themselves. That happens because there are some that don't agree with the use of a certain type of valve. But the true problem, is that anecdotally 9 out of 10 cars in a sample on here have bad guides. That is a problem. If 9 out of 10 cars were having valve issues, then that would be the primary issue to focus on.
There is absolutely no need for these endless pages on the actual valves themselves. That happens because there are some that don't agree with the use of a certain type of valve. But the true problem, is that anecdotally 9 out of 10 cars in a sample on here have bad guides. That is a problem. If 9 out of 10 cars were having valve issues, then that would be the primary issue to focus on.
Excellent post and I could not agree more. I wonder if these debates will ever end. 
like I've said I think some people just enjoy debating for the sake of debating..problem is there is NEVER any new information, same ol arguments and people trying convince each other they are right. Lot of it boils simply down to who you trust..that's why I think it's funny the heated debates.. regardless of how "right" or technically savy someone can debate here, I would Never base any decision on my car soley off what I read here from total strangers.Maybe I get pointed in the right direction to said vendor or shop that can demonstrate success, but that is about it. The rest of all the BS and useless debating here is just that .....BS.
07-02-2013, 02:31 PM
#303
07-02-2013, 02:52 PM
#304
Le Mans Master
07-02-2013, 04:44 PM
#305
Team Owner
07-02-2013, 04:46 PM
#306
Team Owner
07-02-2013, 05:05 PM
#307
07-02-2013, 05:56 PM
#308
Le Mans Master
Just for the day, we all meet in El Cajon on Wed late afternoon for their weekly car show. I just got back from Amsterdam and now off to Daytona on Friday for the races.
07-02-2013, 08:17 PM
#309
Team Owner
07-02-2013, 08:18 PM
#310
Team Owner
07-02-2013, 09:11 PM
#311
09-29-2013, 07:33 PM
#312
Cruising
Member Since: Mar 2013
Location: Corpus Christi Texas
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Who has been running the bronze guides the longest? I would like to know how long someone can expect them to stay in spec with oem rockers, possible with trunion upgrades
09-29-2013, 08:38 PM
#313
Team Owner
DH
09-29-2013, 10:10 PM
#314
Safety Car
Several months ago Quick mentioned a few examples of Solid-stem/bronze cars that had 25K+ miles on them... but no repeat inspections to say if it was working or not. The few people that DID have data on their "fixed" heads were coming back after only 8-10K miles and that may have limited usefulness.
In light of Z06Tanner/Chad's recent post on the SS wear in heads with 10K miles on them... it may very well continue to be a total crap shoot. That specific situation seems to have some asterisks to it (big cam, etc) - but it's the 2nd case with SS valves that people would have otherwise assumed to be "fixed."
Whether people pony up the cash or not, Howie - it might be a smart move to have the heads rechecked regardless since you're running on your own dime nowadays.
In light of Z06Tanner/Chad's recent post on the SS wear in heads with 10K miles on them... it may very well continue to be a total crap shoot. That specific situation seems to have some asterisks to it (big cam, etc) - but it's the 2nd case with SS valves that people would have otherwise assumed to be "fixed."
Whether people pony up the cash or not, Howie - it might be a smart move to have the heads rechecked regardless since you're running on your own dime nowadays.
09-29-2013, 11:54 PM
#315
Team Owner
Several months ago Quick mentioned a few examples of Solid-stem/bronze cars that had 25K+ miles on them... but no repeat inspections to say if it was working or not. The few people that DID have data on their "fixed" heads were coming back after only 8-10K miles and that may have limited usefulness.
In light of Z06Tanner/Chad's recent post on the SS wear in heads with 10K miles on them... it may very well continue to be a total crap shoot. That specific situation seems to have some asterisks to it (big cam, etc) - but it's the 2nd case with SS valves that people would have otherwise assumed to be "fixed."
Whether people pony up the cash or not, Howie - it might be a smart move to have the heads rechecked regardless since you're running on your own dime nowadays.
In light of Z06Tanner/Chad's recent post on the SS wear in heads with 10K miles on them... it may very well continue to be a total crap shoot. That specific situation seems to have some asterisks to it (big cam, etc) - but it's the 2nd case with SS valves that people would have otherwise assumed to be "fixed."
Whether people pony up the cash or not, Howie - it might be a smart move to have the heads rechecked regardless since you're running on your own dime nowadays.
For me "DATA" is the lack of failed motors with the WCCH heads
DH
09-30-2013, 12:13 AM
#316
Drifting
My car is an 08 with a little over 34k miles. It is stock except for an axle back. I have GMPP until 2015 or about 20,000 more miles. Have any of the known failures occurred past my mileage? I was on the fence about keeping the car past my warranty period but I kinda want to now. Should I take it to a dealer and complain about valve train noise or just wait till my coverage is up and have the heads done?
09-30-2013, 12:58 AM
#317
If I were you I'd keep it, if it holds all through your warranty swap the heads. If it blows up get a replacement ls7 and maybe you get one that has had the issue fixed, according to gm.
09-30-2013, 01:12 AM
#318
Drifting
I really wish these cars weren't plagued by this issue. Mine has made it farther than most but I know I'd be nervous if I didn't have an extended warranty. I want to go hci after the warranty but there seems to be no concrete answer on the actual problem to this day. GM has to know whether it's the valves, the guides, or the heads.
09-30-2013, 03:46 AM
#320
I really wish these cars weren't plagued by this issue. Mine has made it farther than most but I know I'd be nervous if I didn't have an extended warranty. I want to go hci after the warranty but there seems to be no concrete answer on the actual problem to this day. GM has to know whether it's the valves, the guides, or the heads.