5.3 V8 valve spring issues?

[Fireman591]

Anyone out there have an issue with their 5.3 V8 breaking a valve spring? There is a TSB out on it and I have been on many of the other GM forums. It seems like the problem is overwhelmingly with the 6.2 V8 but there are still a handful of 5.3s with broken valve springs. Just wondering how the 5.3s are holding up on the 2021 Tahoes. Here is a link to that TSB info. https://gmauthority.com/blog/2020/0...dresses-valve-spring-issues-in-gm-v8-engines/

 

[B520044]

If a faulty valve spring was about to go out; would the engine have a slight ticking sound?

 

[yukontruckman]

Been doing a little digging on this and it seems the failures are occurring very early. Vehicles with 100, 200, 300 miles. Is it safe to assume the springs are (probably) ok for now if no issues at 4K miles? I'm going to have the dealer check them soon either way.

 

[B520044]

Been doing a little digging on this and it seems the failures are occurring very early. Vehicles with 100, 200, 300 miles. Is it safe to assume the springs are (probably) ok for now if no issues at 4K miles? I'm going to have the dealer check them soon either way.

I have 7500 miles and just let it idle for several minutes with the hood up. I didn't hear a ticking noise coming from motor, just underneath close to transmission (possibly exhaust). However there is a very high pitched noise coming from something under the hood. Like a bearing squealing or something. Possibly from the alternator? Not sure its normal or not. Video below:

 

[Fireman591]

Been doing a little digging on this and it seems the failures are occurring very early. Vehicles with 100, 200, 300 miles. Is it safe to assume the springs are (probably) ok for now if no issues at 4K miles? I'm going to have the dealer check them soon either way.

There is a member on one of the GM truck forums that had his springs fail at 7000 miles on the odometer If you fall in that window of June 1st to October 7th demand the dealer change all 16 springs. We all spend big money on our trucks and should not have to drive around knowing we possibly got one or more of the bad springs in our engine.

https://www.gm-trucks.com/forums/to...tin-for-faulty-valve-springs/page/7/#comments

 

[SAdude]

There is a member on one of the GM truck forums that had his springs fail at 7000 miles on the odometer If you fall in that window of June 1st to October 7th demand the dealer change all 16 springs. We all spend big money on our trucks and should not have to drive around knowing we possibly got one or more of the bad springs in our engine.

https://www.gm-trucks.com/forums/to...tin-for-faulty-valve-springs/page/7/#comments

How can one tell when their truck was built?

 

[TolaxSJC]

Build date is on a silver sticker in the drivers door jam (where the passenger door meets). Thankfully mine appears to be October 20th.

Tolax

 

[Fireman591]

The engine sticker is on the rear of the drivers side head. The first 2 digits are the year and the next 3 numbers are the day it was built. My engine was built in 2020 on the 161st day (June 9th). My vehicle according to GM was assembled June 30th. So I have the faulty springs in my engine

 

[Norm 427]

Thiis bulletin is primarily for the 6.2L.

"The bulletin also indicates that the above fix only applies to the following 6.2L GM V8 engines: L87, LT1, LT2 and LT4. For all other current GM V8 engine RPOs (L82, L84 and L8T), the service department is instructed to “just replace the affected valve spring,” and that if they determine there is a cylinder leakage, it “will be necessary to inspect further to determine the extent of the engine damage to determine correct repair required.” GM is also requesting that the service department send back valve springs from affected engines for further inspection.The bulletin also indicates that the above fix only applies to the following 6.2L GM V8 engines: L87, LT1, LT2 and LT4. For all other current GM V8 engine RPOs (L82, L84 and L8T), the service department is instructed to “just replace the affected valve spring,” and that if they determine there is a cylinder leakage, it “will be necessary to inspect further to determine the extent of the engine damage to determine correct repair required.”

 

[Fireman591]

Thiis bulletin is primarily for the 6.2L.

"The bulletin also indicates that the above fix only applies to the following 6.2L GM V8 engines: L87, LT1, LT2 and LT4. For all other current GM V8 engine RPOs (L82, L84 and L8T), the service department is instructed to “just replace the affected valve spring,” and that if they determine there is a cylinder leakage, it “will be necessary to inspect further to determine the extent of the engine damage to determine correct repair required.” GM is also requesting that the service department send back valve springs from affected engines for further inspection.The bulletin also indicates that the above fix only applies to the following 6.2L GM V8 engines: L87, LT1, LT2 and LT4. For all other current GM V8 engine RPOs (L82, L84 and L8T), the service department is instructed to “just replace the affected valve spring,” and that if they determine there is a cylinder leakage, it “will be necessary to inspect further to determine the extent of the engine damage to determine correct repair required.”

It is not just the 6.2. All V8s across all models from GM got the batch of bad valve springs. Take a peak on the Corvette, Camero and silverado forums. They are loaded with posts about broken valve springs. Such a shame GM is trying to keep this hush hush instead of contacting the owners of these vehicles and getting them in to a dealer to replace their valve springs. Instead they are rolling the dice with the safety of their customers and waiting until their engine fails. Hopefully no one will get killed or hurt due to a loss of engine power at a bad time before GM does the responsible thing.