LS7 Failures in the Z/28's How Many? - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

DasBaldDog · 03-26-2019, 09:28 AM

Side question, actually 2.

Where does one buy the GMPP besides the dealer? Google gives me a bunch of links that look shady.

Can I still get the GMPP on a 14 Z?

Supercup · 03-26-2019, 09:43 AM

Well if the 6.5/1,000 motor incident rate JAS noted holds true then we should expect 12 motors failures out of the 1,801 Z/28's.

Only way to be sure you are not is to do the top end before anything happens. Only downside is some cost, but well worth it for long term peace of mind!

JR'S Z/28 Texas · 03-26-2019, 10:28 AM

Thanks for the replies and input! I guess the big answer is no matter the engine or the manufacturer Any of Them can Fail especially if pushed hard enough. And 505hp out of a naturally aspirated 427 also has its boundaries. As much as we don't want to think so. Thanks JR

rcandiloro · 03-26-2019, 03:47 PM

Quote:

Originally Posted by DasBaldDog

Side question, actually 2.

Where does one buy the GMPP besides the dealer? Google gives me a bunch of links that look shady.

Can I still get the GMPP on a 14 Z?

Call Patrick Ryan at Denny Menholt Chevrolet......he gave me an extended warranty on my 2009 ZR1 in 2016. Super easy......I imagine he can do it for any Chevy.......

If that number doesn't work, use (406) 896-3058

sixty9fordkiller · 03-26-2019, 06:28 PM

Quote:

Originally Posted by DasBaldDog

Side question, actually 2.

Where does one buy the GMPP besides the dealer? Google gives me a bunch of links that look shady.

Can I still get the GMPP on a 14 Z?

i buy all my oem stuff grom gmpartsgiant.com and gmpartsdirect.com in that order.

no issue. bought brand new 1LE axles, hubs, driveshaft bolts, etc.......all legit stuff and the price was good

joelster · 03-26-2019, 07:20 PM

Quote:

Originally Posted by j o n

I believe MX621 was referencing 'reading' supporting evidence, outside of GM/Chevy, that supports the heads/guides were fixed.

GM/Chevy will always protect themselves and use their biased data and claims to sooth customers.

You need to consider the source of what information you're receiving.

There was another guy outside of GM that handled the engines for a race team or race series. I don't remember exactly. They had a bunch of LS7's, all driven hard, and they experienced no valve guide issues. I'm too tired and lazy right now to search for it.

69L48Z27 · 03-26-2019, 08:17 PM

Has anyone on this forum lost an engine due to this valve issue? I don’t recall seeing any yet.

j o n · 03-26-2019, 09:02 PM

Quote:

Originally Posted by Supercup

See post #6 - 4 FN 27 - has link to his engine failure - less than 1,000 miles back in 15.

fusion of ideas lost his too

Gbland60 · 03-26-2019, 09:20 PM

Russ of fusion floated a valve.

69L48Z27 · 03-26-2019, 09:23 PM

I didn’t see anything about a dropped valve in post 6.

DasBaldDog · 03-27-2019, 06:47 AM

Quote:

Originally Posted by sixty9fordkiller

i buy all my oem stuff grom gmpartsgiant.com and gmpartsdirect.com in that order.

no issue. bought brand new 1LE axles, hubs, driveshaft bolts, etc.......all legit stuff and the price was good

They sell the extended warranty (GMPP)? Seems odd.

Zulu28 · 03-29-2019, 12:44 PM

Broken valve spring. #6 piston on the intake side. No check engine light, just started missing real bad. 95K miles all highway. No track days. Maintained using the 'severe' schedule. GM would not warranty due to headers. Changed all 16 springs and runs like new.

MrRaZ28 · 03-29-2019, 01:39 PM

Quote:

Originally Posted by Zulu28

Broken valve spring. #6 piston on the intake side. No check engine light, just started missing real bad. 95K miles all highway. No track days. Maintained using the 'severe' schedule. GM would not warranty due to headers. Changed all 16 springs and runs like new.

Do you have any noticeable valve train noise at around 2K RPM? Does it go away once warm?

richard grimsley · 03-31-2019, 07:52 PM

FYSA- I ended up having a odd noise from my Z at its 13k mile mark. Identification of concern after driving it for less than 4K miles as a DD. I took the Z in for concern. The heads were found to be of default and they were removed for repairs. Further investigation highly recommended, found that the bearings were shot (cam, cylinder walls, pistons and crank mains). The technical investigation department found the damage resulted to either the heads and or assembly. The GM warrenty did not cover due expiration. Thus, the engine had been thoroughly inspected and approved, the damage had not been discovered due to a the lack of investigation of internal components prior or at purchase, thus purchased with “GM certified-inspection”. From my overall perspective-crap happens. It’s a chance we take and or choose. We live every day, and only die once... we cannot take these materialistic items with us.

03-26-2019, 10:28 AM	#17
JR'S Z/28 Texas Life is Short! Enjoy IT!! Drives: 2014 Red Z/28 Join Date: Dec 2017 Location: Tatum, Texas Posts: 35	Thanks for the replies and input! I guess the big answer is no matter the engine or the manufacturer Any of Them can Fail especially if pushed hard enough. And 505hp out of a naturally aspirated 427 also has its boundaries. As much as we don't want to think so. Thanks JR __________________

03-26-2019, 09:28 AM	#15
DasBaldDog Drives: 2017 Focus RS Join Date: Nov 2017 Location: Loganville, GA Posts: 177	Side question, actually 2. Where does one buy the GMPP besides the dealer? Google gives me a bunch of links that look shady. Can I still get the GMPP on a 14 Z?

03-26-2019, 09:43 AM	#16
Supercup Life Is Short Enjoy It! Drives: Former Owner 15 Z/28 #934 Join Date: Sep 2016 Location: S. Cal Posts: 897	Well if the 6.5/1,000 motor incident rate JAS noted holds true then we should expect 12 motors failures out of the 1,801 Z/28's. Only way to be sure you are not is to do the top end before anything happens. Only downside is some cost, but well worth it for long term peace of mind!

03-26-2019, 08:17 PM	#21
69L48Z27 Drives: 2015 Z/28; 1969 Camaro SS Join Date: Nov 2015 Location: York, PA Posts: 814	Has anyone on this forum lost an engine due to this valve issue? I don’t recall seeing any yet.

03-26-2019, 09:20 PM	#23
Gbland60 Drives: 2015 z28 Black w/ac #645 Join Date: Jan 2017 Location: Southeast Texas Posts: 337 View My Garage	Russ of fusion floated a valve.

03-26-2019, 09:23 PM	#24
69L48Z27 Drives: 2015 Z/28; 1969 Camaro SS Join Date: Nov 2015 Location: York, PA Posts: 814	I didn’t see anything about a dropped valve in post 6.

03-29-2019, 12:44 PM	#26
Zulu28 Drives: 2019 Camaro ZL1 Join Date: Jun 2015 Location: Nashville, TN. Posts: 27	Broken valve spring. #6 piston on the intake side. No check engine light, just started missing real bad. 95K miles all highway. No track days. Maintained using the 'severe' schedule. GM would not warranty due to headers. Changed all 16 springs and runs like new.

03-31-2019, 07:52 PM	#28
richard grimsley GRIM Drives: 2015 Camaro Z/28 Join Date: May 2010 Location: Marlton, NJ. Posts: 169	FYSA- I ended up having a odd noise from my Z at its 13k mile mark. Identification of concern after driving it for less than 4K miles as a DD. I took the Z in for concern. The heads were found to be of default and they were removed for repairs. Further investigation highly recommended, found that the bearings were shot (cam, cylinder walls, pistons and crank mains). The technical investigation department found the damage resulted to either the heads and or assembly. The GM warrenty did not cover due expiration. Thus, the engine had been thoroughly inspected and approved, the damage had not been discovered due to a the lack of investigation of internal components prior or at purchase, thus purchased with “GM certified-inspection”. From my overall perspective-crap happens. It’s a chance we take and or choose. We live every day, and only die once... we cannot take these materialistic items with us.