# Intermittent low pitch metallic clattering only between 65 mph & 75 mph **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** prius, toyota\ **Created:** [June 11, 2020, 11:15pm UTC](https://community.cartalk.com/t/intermittent-low-pitch-metallic-clattering-only-between-65-mph-75-mph/165645 "2020-06-11T23:15:15Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![kailee\_168137](https://avatars.discourse-cdn.com/v4/letter/k/48db29/32.png) [@kailee\_168137](https://community.cartalk.com/u/kailee_168137)\ **Post date:** [June 11, 2020, 11:15pm UTC](https://community.cartalk.com/t/intermittent-low-pitch-metallic-clattering-only-between-65-mph-75-mph/165645/1 "2020-06-11T23:15:15Z")
For the past year or so, I have noticed an intermittent faint low pitch metallic clattering or jangling noise coming from under the driver’s side at speeds only between 65 mph & 75 mph - no such noise below speeds of 65 mph or above 75 mph. First noticed it very faint and has gotten only slightly louder relative to when the noise began. The most puzzling part of the noise is that it sometimes happens at speeds between 65 mph and 75 mph but other times it does not happen in the same speed parameter. Please help! ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [June 11, 2020, 11:17pm UTC](https://community.cartalk.com/t/intermittent-low-pitch-metallic-clattering-only-between-65-mph-75-mph/165645/2 "2020-06-11T23:17:32Z")
Have someone check for a loose exhaust heat shield. Tester ---
**Author:** ![kailee\_168137](https://avatars.discourse-cdn.com/v4/letter/k/48db29/32.png) [@kailee\_168137](https://community.cartalk.com/u/kailee_168137)\ **Post date:** [June 11, 2020, 11:19pm UTC](https://community.cartalk.com/t/intermittent-low-pitch-metallic-clattering-only-between-65-mph-75-mph/165645/3 "2020-06-11T23:19:41Z")
Thank you. Will do. Would you mind sharing why it could be causing that noise only between those speeds? ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [June 11, 2020, 11:22pm UTC](https://community.cartalk.com/t/intermittent-low-pitch-metallic-clattering-only-between-65-mph-75-mph/165645/4 "2020-06-11T23:22:23Z")
The under engine cover may be loose and fluttering. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [June 11, 2020, 11:27pm UTC](https://community.cartalk.com/t/intermittent-low-pitch-metallic-clattering-only-between-65-mph-75-mph/165645/5 "2020-06-11T23:27:12Z")
Heat shields can start to make noise at certain frequencies where they resonate/vibrate at certain speeds/RPM’s. Tester ---
**Author:** ![kailee\_168137](https://avatars.discourse-cdn.com/v4/letter/k/48db29/32.png) [@kailee\_168137](https://community.cartalk.com/u/kailee_168137)\ **Post date:** [June 11, 2020, 11:45pm UTC](https://community.cartalk.com/t/intermittent-low-pitch-metallic-clattering-only-between-65-mph-75-mph/165645/6 "2020-06-11T23:45:42Z")
Very helpful. Thank you, again. ---
**Author:** ![kailee\_168137](https://avatars.discourse-cdn.com/v4/letter/k/48db29/32.png) [@kailee\_168137](https://community.cartalk.com/u/kailee_168137)\ **Post date:** [June 11, 2020, 11:46pm UTC](https://community.cartalk.com/t/intermittent-low-pitch-metallic-clattering-only-between-65-mph-75-mph/165645/7 "2020-06-11T23:46:25Z")
Thank you. Will have that checked that as well ---
**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\ **Post date:** [June 12, 2020, 1:34pm UTC](https://community.cartalk.com/t/intermittent-low-pitch-metallic-clattering-only-between-65-mph-75-mph/165645/8 "2020-06-12T13:34:54Z")
> [@Tester](#): > > Heat shields can start to make noise at certain frequencies where they resonate/vibrate at certain speeds/RPM’s. +1 In some cases, they will make noise only at idle speed. In other cases, the problem can crop-up at virtually any speed or RPM range–depending on the specific car and exactly how its heat shield has been damaged/loosened.