GX460 engine knocks when cold
Thread Starter
Driver School Candidate
Joined: Feb 2021
Posts: 4
Likes: 0
From: OH
GX460 engine knocks when cold
Hello:
I have a 2021 GX460 Luxury with 2100 miles. When I start the car today (cold start 36 degree) I notice there is a knock inside of the car.
is it normal? I attached the noise, sorry for the noise of my stuffed nose. There is a clear knock, ticking, pounding noise. Please adjust your device to higher volume in order to listen.
Thanks
https://drive.google.com/file/d/1r80...w?usp=drivesdk
I have a 2021 GX460 Luxury with 2100 miles. When I start the car today (cold start 36 degree) I notice there is a knock inside of the car.
is it normal? I attached the noise, sorry for the noise of my stuffed nose. There is a clear knock, ticking, pounding noise. Please adjust your device to higher volume in order to listen.
Thanks
https://drive.google.com/file/d/1r80...w?usp=drivesdk
Last edited by AngLi; Mar 5, 2021 at 10:17 PM.
Intermediate
Joined: Aug 2020
Posts: 256
Likes: 90
From: TX
Hello:
I have a 2021 GX460 Luxury with 2100 miles. When I start the car today (cold start 36 degree) I notice there is a knock inside of the car.
is it normal? I attached the noise, sorry for the noise of my stuffed nose. There is a clear knock, ticking, pounding noise. Please adjust your device to higher volume in order to listen.
Thanks
https://drive.google.com/file/d/1r80...w?usp=drivesdk
I have a 2021 GX460 Luxury with 2100 miles. When I start the car today (cold start 36 degree) I notice there is a knock inside of the car.
is it normal? I attached the noise, sorry for the noise of my stuffed nose. There is a clear knock, ticking, pounding noise. Please adjust your device to higher volume in order to listen.
Thanks
https://drive.google.com/file/d/1r80...w?usp=drivesdk
Thread Starter
Driver School Candidate
Joined: Feb 2021
Posts: 4
Likes: 0
From: OH
The Google drive link says I must request access to view it. On the topic of the engine knock, I have always noticed it on mine upon a cold start especially in the 30s and 20s. My GX is at 141k now, had it since new, never had any engine issues (knock on wood). Although it is hard to say if this is the same thing you are experiencing.
https://drive.google.com/file/d/1r80...w?usp=drivesdk
Thanks
Pole Position
Joined: Jan 2019
Posts: 2,707
Likes: 1,446
From: WA
Hard to distinguish ... the audio sounds very muffled ... but the sound does not seem to exactly time with engine RPM's. Slowly increase and decrease engine speed between 1,000 - 2,000 RPM's to see if the sound (knock frequency) increases / decreases with RPM's. I assume the sound was recorded while in Neutral at engine idle ... does it change when placed in Drive ?
Driver
Joined: Jan 2019
Posts: 110
Likes: 56
I moan and groan when it's cold also....
Mines got a little startup rattle, likely timing chain... but goes away in a nano second. Would you put the camera near the engine and start it up to get some better audio for us arm chair mechanics to "diagnose"?
Mines got a little startup rattle, likely timing chain... but goes away in a nano second. Would you put the camera near the engine and start it up to get some better audio for us arm chair mechanics to "diagnose"?
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Driver School Candidate
Joined: Jan 2021
Posts: 38
Likes: 8
From: California
Hello:
I have a 2021 GX460 Luxury with 2100 miles. When I start the car today (cold start 36 degree) I notice there is a knock inside of the car.
is it normal? I attached the noise, sorry for the noise of my stuffed nose. There is a clear knock, ticking, pounding noise. Please adjust your device to higher volume in order to listen.
Thanks
https://drive.google.com/file/d/1r80...w?usp=drivesdk
I have a 2021 GX460 Luxury with 2100 miles. When I start the car today (cold start 36 degree) I notice there is a knock inside of the car.
is it normal? I attached the noise, sorry for the noise of my stuffed nose. There is a clear knock, ticking, pounding noise. Please adjust your device to higher volume in order to listen.
Thanks
https://drive.google.com/file/d/1r80...w?usp=drivesdk
*Mostly the valve train
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Does not sound like knocking or valve train noise. You would not normally knock when cold anyway. I would go ahead and change your oil. It’s good for the engine to change the first oil out as high levels of metal in the oil from the break-in period act as microscopic sandpaper. The sound is similar to what I hear when the air pump kicks on. This is most likely what you are hearing.
Last edited by Lavrishevo; Mar 9, 2021 at 08:08 AM.
Driver
Joined: Dec 2023
Posts: 64
Likes: 17
From: MD
Have the same thing since new 2023 bought last Oct. Only happens when cold and not all the time. Dealer said can't duplicate. Of course they would say this.
Mentioned it to another dealer and said it's plausible it's piston slap.
Mentioned it to another dealer and said it's plausible it's piston slap.
Pole Position
Joined: Jan 2019
Posts: 2,707
Likes: 1,446
From: WA
Had a 1986 Toyota 4x4 Pickup from new ... knocked on Cold Start ... TSB indicated that Toyota had shortened the Piston Skirt to reduce friction ... knocking would go away after 2-minutes of warm-up. Toyota's position was that the engine would last beyond the warranty period ... the engine went 285,000 miles ... and only expired due to overheating.
Had a 1990 Toyota 4-Runner from new ... 6,000-odd miles in ... it developed rod knock ... muffled on Cold Start ... reduced upon warm-up but was still present ... Dealership refused to acknowledge, but I elevated to the regional manager ... result: long-block was replaced under warranty.
The GX has many more Cold Start noise sources than earlier vehicles ... so best if it can be pinpointed, and pursued with the Dealership until one is satisfied.
Had a 1990 Toyota 4-Runner from new ... 6,000-odd miles in ... it developed rod knock ... muffled on Cold Start ... reduced upon warm-up but was still present ... Dealership refused to acknowledge, but I elevated to the regional manager ... result: long-block was replaced under warranty.
The GX has many more Cold Start noise sources than earlier vehicles ... so best if it can be pinpointed, and pursued with the Dealership until one is satisfied.
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