09-24-2020, 11:31 PM | #1 |
L8ap3x
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New service bulletin-2020 GM V8 motor valve spring issues.
https://gmauthority.com/blog/2020/09...gm-v8-engines/
The service bulletin indicates that vehicles equipped with certain GM V8 engines may produce a service engine light along with a misfire and strange engine noise. The issues can be linked back to faulty valve springs, with the bulletin instructing the service department to check for a broken valve spring and, if necessary, perform a cylinder leakage test on the cylinder with the broken spring. The bulletin also says that “if no cylinder leakage is observed it will be necessary to replace all valve springs on both banks if the vehicle is built between June 1, 2020 to September 15, 2020.” 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. |
09-24-2020, 11:45 PM | #2 |
Drives: 19 Chevrolet Camaro 2SS 1LE Shock Join Date: Apr 2020
Location: BC, Canada
Posts: 1,947
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So I am assuming it's a bad batch, then?
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2019 Chevrolet Camaro 2SS 1LE M6 Shock GM Performance Intake and that's it, because driver mods before car mods Past: 2009 Mazda RX-8 GT M6 Velocity Red Mica (Sold) 2015 Chevrolet Corvette Z51 2LT M7 Velocity Yellow Tintcoat (Flood totaled) |
09-24-2020, 11:48 PM | #3 |
L8ap3x
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Is this the suppliers version of car covid?
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09-25-2020, 12:23 AM | #4 |
2020 Shadow Gray 2SS
Drives: 2020 2SS - A10, NPP, MRC, CAI Join Date: Dec 2019
Location: SoCal
Posts: 3,030
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Glad my 2020 2SS was built last December...
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2020 SGM 2SS - A10, NPP, MRC, Red Calipers, Black Camaro Fender Badge, Footwell Lighting
Added after delivery: - GMP CAI, GMP Black Strut Tower Brace, MRR017 1LE Wheels, SS Armrest, Black Fuel Door, Stainless Sport Pedals, SS Wheel Caps, Black Lugs/Locks, GM Splash Guards, DD Smoked LED Markers, Smoked Rear Reflectors, Mishimoto Catch Can, Xpel PPF - Full Front, SunTek 35% Tint, CeramicPro coating, RST Stainless Brake Lines, Castrol SRF, MSD Super Conductor Wires Left: My "fun" ride. Right: My "work" ride: a Gulfstream G600. One's top speed is 180 Mph, the other, 620 Mph... |
09-25-2020, 12:30 AM | #5 |
Drives: 19 Chevrolet Camaro 2SS 1LE Shock Join Date: Apr 2020
Location: BC, Canada
Posts: 1,947
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At least it's not as bad as the Subaru and Mazda diesel valve spring recalls, which are more of a design issue than a supplier issue.
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Current:
2019 Chevrolet Camaro 2SS 1LE M6 Shock GM Performance Intake and that's it, because driver mods before car mods Past: 2009 Mazda RX-8 GT M6 Velocity Red Mica (Sold) 2015 Chevrolet Corvette Z51 2LT M7 Velocity Yellow Tintcoat (Flood totaled) |
09-25-2020, 06:58 AM | #6 |
Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016
Location: Georgia
Posts: 5,813
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Reminds me of my 2010 2SS with the LS3 and the broken valve spring I had replaced under warranty in 2012! Come on GM, stop putting inferior parts in the engines now!
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09-25-2020, 07:28 AM | #7 |
Drives: 2023 Black Camaro 2SS Join Date: Sep 2017
Location: Cincinnati
Posts: 259
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so if our car was built in July 2020 should I take it in to the dealership today?
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09-25-2020, 07:37 AM | #8 |
Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016
Location: Georgia
Posts: 5,813
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Orangeman, I would contact your dealer and talk to the Service advisor or Service Manager and ask them about this news and they will advise you. Don’t panic!��
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09-25-2020, 07:51 AM | #9 |
Account Suspended
Drives: Fast if no one's looking Join Date: Aug 2019
Location: Cleveland, Ohio
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The real question is HOW did the batch become faulty? They're the same springs that have been on every LT1 in both Camaro and Corvette since C7 LT1 production started for the 2014 model year. What did the factory do differently in the production process?
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09-25-2020, 08:00 AM | #10 |
Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016
Location: Georgia
Posts: 5,813
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Yeah I agree with that Petrol Head. Could be that GM used a different part manufacturer which was cheaper than before or other factors causing the problems. My ZL1 LT4 maybe a ticking timebomb waiting to go off due to some LT4s having defective oil pumps and for that reason mine will stay stock until the drivetrain warranty is up.
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09-25-2020, 08:25 AM | #11 |
Hard to want.
Drives: 2020 red hot 1SS 1LE Join Date: Aug 2017
Location: Nashville Tennessee
Posts: 527
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My car was built in July. I’m going to call the dealer today and see what they have to say. I’ll report back.
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09-25-2020, 09:01 AM | #12 |
Banned
Drives: 2015 Camaro Join Date: Aug 2018
Location: My Garage
Posts: 1,125
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The new C8 seems to be having a big problem with this. More than a few cars over on the Corvette Forum reporting issues with cracked valve springs.
Also, it seems if this problem develops, it happens early like within the first hundred or so miles of ownership. So, I think if you already have a thousand or more miles, you're probably safe from having the cracked valve spring issue. |
09-25-2020, 09:52 AM | #13 | |
Drives: 2020 SS1LE Shadow Gray Metallic Join Date: Feb 2018
Location: New England
Posts: 294
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Quote:
I am just under 500 miles, many of the C8's I have seen with the valve spring issues seemed to have issues under 100 miles, but who knows. |
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09-25-2020, 10:03 AM | #14 | |
Hard to want.
Drives: 2020 red hot 1SS 1LE Join Date: Aug 2017
Location: Nashville Tennessee
Posts: 527
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