Scary whine when the engine is cold
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Scary whine when the engine is cold
Hello guys! I just bought my first Jaguar. A 2004 X Type with a 2 liter V6.
Great car, however, it's making a whining sound while accelerating. Really loud when the engine is cold. As soon as I start the car and rev it, there is no sound whatsoever. But, if I shift into Drive or Reverse, and back into park and rev it, it whines. That's it. I don't even have to move the car. Won't make a sound until I shift into a gear, but after I shift, it whines continuously with the RPM. It's a fairly loud groaning whine. Kind of scary.
It quiets down when warmed up. But it's still noticable. I googled a bit and found out that it could be the transfer case, but my car, being FWD, doesn't have a transfer case. Pretty confused right now.
I took a quick video and uploaded it on YouTube. Please have a listen.
Any ideas?
Thanks!
Great car, however, it's making a whining sound while accelerating. Really loud when the engine is cold. As soon as I start the car and rev it, there is no sound whatsoever. But, if I shift into Drive or Reverse, and back into park and rev it, it whines. That's it. I don't even have to move the car. Won't make a sound until I shift into a gear, but after I shift, it whines continuously with the RPM. It's a fairly loud groaning whine. Kind of scary.
It quiets down when warmed up. But it's still noticable. I googled a bit and found out that it could be the transfer case, but my car, being FWD, doesn't have a transfer case. Pretty confused right now.
I took a quick video and uploaded it on YouTube. Please have a listen.
Any ideas?
Thanks!
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Joined: May 2011
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From: ga
hard to tell on a video but sounds a little like the heat shield on the exhaust manifold.
common issue...one of the mounting bolt areas can rust through and the shield becomes loose and rattles.
google x type loose exhaust heat shield.
plenty of posts in here about it
common issue...one of the mounting bolt areas can rust through and the shield becomes loose and rattles.
google x type loose exhaust heat shield.
plenty of posts in here about it
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Thanks for the replies! I tried the search criteria, got results, but only found one video, and that was about a constant rattle.
If it is a heat shield, how can the pitch change with engine RPM?
This only happens when revving the engine. When I started the car and revved it, it didn't make a sound. I then shifted into D and kept it for 2 seconds, then to R, again for 2 seconds, and then shifted back to P. Revved it, THATS when the whine started! I didnt move the car, Just kept my foot on the brake and shifted to D and back.
Heres a video I took while revving, right after starting the car.
And heres a video I took while revving, after shifting to D and back.
So, no whine until I shift into a gear and back to Park. It can't be the gearbox because its fully disengaged when in Park, right?
If it is a heat shield, how can the pitch change with engine RPM?
This only happens when revving the engine. When I started the car and revved it, it didn't make a sound. I then shifted into D and kept it for 2 seconds, then to R, again for 2 seconds, and then shifted back to P. Revved it, THATS when the whine started! I didnt move the car, Just kept my foot on the brake and shifted to D and back.
Heres a video I took while revving, right after starting the car.
And heres a video I took while revving, after shifting to D and back.
So, no whine until I shift into a gear and back to Park. It can't be the gearbox because its fully disengaged when in Park, right?
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Joined: May 2011
Posts: 1,741
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From: ga
i can only lead you to the water.
im not a physics scolar so i cannot explain the hows and whys of your noise.
what i can say is that you have the classic sound and symptoms of what i have suggested is the cause.
your 2nd post only confirms this more.
feel free to look for other causes... perhaps try the chevy forum... lol
im not a physics scolar so i cannot explain the hows and whys of your noise.
what i can say is that you have the classic sound and symptoms of what i have suggested is the cause.
your 2nd post only confirms this more.
feel free to look for other causes... perhaps try the chevy forum... lol
Last edited by iownme; Sep 6, 2018 at 02:36 PM.
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Sorry for the late reply guys. Was a little busy yesterday. Alright. You guys are the experts, and that's why I came here. If that's what you guys say, then that's what I will check 
I was skeptical because it doesn't make a sound until I shift into a gear.
I'll get this baby up on a hoist ASAP and give you guys an update.
Thanks a lot for helping me out!
I was skeptical because it doesn't make a sound until I shift into a gear.
I'll get this baby up on a hoist ASAP and give you guys an update.
Thanks a lot for helping me out!
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So I put the car up on a lift and checked all the heat shields. They're all nice and tight. No rattles.
I did notice that the right hand side engine mount appears to have been squashed a little. That could be it?
I did notice that the right hand side engine mount appears to have been squashed a little. That could be it?
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