bigriver
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Hi Everyone
I have a 2018 GT premium, magnetic metallic, manual with PP, active valve, magneride and smart and safe. 1500 miles. Build date 11/16/2017 Flatrock Assembly Plant. I purchased the car on 3/27/18.
It's my first mustang and it already needs a new engine. I've had engine rattle from when I first purchased it. My original dealer said it was normal. Took it to a second dealer who replicated the rattle which happens under slight throttle from 2000-2500 rpm after shifting and the rattle stays constant when I hold rpm at 2200, loudest in 3rd gear. The noise diminishes a little when the engine is warm but you can still hear it. The rattle is loud enough where I am embarrassed to drive it.
Both the service tech and heavy line tech put the car on the rack and isolated the rattle to the engine. I asked them to check the clutch/driveline and they said this was not the issue.. Heavy line tech found damage to cylinders 5-8 from excessive piston slap. Pictures from borescope attached. The heavy line tech recommended a new engine replacement. Ford only approved a new short block.
UPDATE : Ford approved buyback under lemon law in California on 5/10/18. Worked with Ford Vehicle Reacquisition Department on a refund (started on 5/22/18). Approved the refund on 6/13/18. Refund received on 6/21/18. Loan payoff completed on 7/2/18.
While this OASIS note is for a GT350 (2018 GT uses the same spray bore liner as the GT350), it could be the cause of the noise I'm hearing based on the excessive piston slap that damaged the cylinders.
OASIS 2888-
Some 2016 GT350 Mustangs might exhibit Piston Rattle from Idle to 3000 RPM
Some 2016 Mustang GT350 equipped with the 5.2L engine may exhibit a rattle or rapping type sound during cold operation at light loads and speeds from idle-3000 rpm. The noise will be most noticeable during light acceleration in the 1500-3000 RPM range and may also be noticeable in the 800-1200 RPM range with neutral throttle blips. This sound is caused by the piston motion in the cylinder bore. This is an inherent characteristic of the forged aluminum pistons utilized in this high performance engine. Once the engine reaches operating temperature the noise will diminish, although it may still be noticeable even when fully warm. There are no durability concerns with this sound.
Here are a couple of videos of the noise. Sounds rather minor but it is rather loud when you drive on a quiet street. Pics of damaged cylinders are below the videos.
Pics of the damaged cylinders.
I have a 2018 GT premium, magnetic metallic, manual with PP, active valve, magneride and smart and safe. 1500 miles. Build date 11/16/2017 Flatrock Assembly Plant. I purchased the car on 3/27/18.
It's my first mustang and it already needs a new engine. I've had engine rattle from when I first purchased it. My original dealer said it was normal. Took it to a second dealer who replicated the rattle which happens under slight throttle from 2000-2500 rpm after shifting and the rattle stays constant when I hold rpm at 2200, loudest in 3rd gear. The noise diminishes a little when the engine is warm but you can still hear it. The rattle is loud enough where I am embarrassed to drive it.
Both the service tech and heavy line tech put the car on the rack and isolated the rattle to the engine. I asked them to check the clutch/driveline and they said this was not the issue.. Heavy line tech found damage to cylinders 5-8 from excessive piston slap. Pictures from borescope attached. The heavy line tech recommended a new engine replacement. Ford only approved a new short block.
UPDATE : Ford approved buyback under lemon law in California on 5/10/18. Worked with Ford Vehicle Reacquisition Department on a refund (started on 5/22/18). Approved the refund on 6/13/18. Refund received on 6/21/18. Loan payoff completed on 7/2/18.
While this OASIS note is for a GT350 (2018 GT uses the same spray bore liner as the GT350), it could be the cause of the noise I'm hearing based on the excessive piston slap that damaged the cylinders.
OASIS 2888-
Some 2016 GT350 Mustangs might exhibit Piston Rattle from Idle to 3000 RPM
Some 2016 Mustang GT350 equipped with the 5.2L engine may exhibit a rattle or rapping type sound during cold operation at light loads and speeds from idle-3000 rpm. The noise will be most noticeable during light acceleration in the 1500-3000 RPM range and may also be noticeable in the 800-1200 RPM range with neutral throttle blips. This sound is caused by the piston motion in the cylinder bore. This is an inherent characteristic of the forged aluminum pistons utilized in this high performance engine. Once the engine reaches operating temperature the noise will diminish, although it may still be noticeable even when fully warm. There are no durability concerns with this sound.
Here are a couple of videos of the noise. Sounds rather minor but it is rather loud when you drive on a quiet street. Pics of damaged cylinders are below the videos.
Pics of the damaged cylinders.
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