03-31-2024, 10:21 PM | #1 |
Drives: 2023 Camaro ZL1 1LE Join Date: Dec 2022
Location: Allentown, Pennsylvania
Posts: 6
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A10 ZLE squeak on downshift
Hey folks had a quick question regarding my 2023 Camaro ZL1 1LE. I recently started noticing a squeaking noise when manually downshifting my A10 ZLE from 7th to 6th. The noise isn’t persistent and only happens when I apply throttle in 7th, going away quickly or when I downshift out of 7th. I don’t believe this vehicle has AFM (which seems to be the source of this noise on the SS’s) but was wondering if it could be the NPP exhaust valves. Curious what everything thinks here though - thanks!
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04-01-2024, 02:28 PM | #2 |
Drives: 2023 Camaro ZL1 1LE Join Date: Dec 2022
Location: Allentown, Pennsylvania
Posts: 6
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I was able to track this down to being the exhaust valves opening when the car is warm. I can reproduce the noise by swapping in and out of the track exhaust mode in the vehicle settings. I'm guessing the valves are dirty / covered in soot. Probably going to have a dealer look at them at my upcoming appointment
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04-01-2024, 09:18 PM | #3 |
Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017
Location: East Tennessee
Posts: 12,002
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These NPP valves need periodic lubrication. I use Drislide and it works like a treat, here is how you can apply it: https://static.nhtsa.gov/odi/tsbs/20...34535-9999.pdf
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2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune 1100 - 1/30/18 | 2000 - 1/31/18 3000 - 2/06/18 TPW 2/26/18 3400 - 2/19/18 | 3800 - 2/26/18 4300 - 2/27/18 | 4B00 - 3/01/18 4200 - 3/05/18 | 4800 - 3/14/18 5000 - 3/16/18 | 6000 - 3/19/18 |
04-02-2024, 09:38 AM | #4 | |
Drives: '18 1SS 1LE Join Date: Sep 2017
Location: Pennsyltucky
Posts: 2,580
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Quote:
Thank you.
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'18 1SS 1LE Black, PDR
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