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Old 19th March 2019, 23:50   #1
zaph
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Default Annoying metallic rattle

I get this annoying matallic clatter, on my 75 diesel but only when I am on the move. Starting the engine at idle, no sound and I don't get the sound when I rev the car in a stationary position.

I have repaired the back and middle heat shields on the exhaust, they had gone walkabout but it wasn't that. I have been under the car, I had a similar noise which turned out to be a loose bolt on the drive shaft to engine mount backplate. i hadn't done it up tight enough during clutch change. Everything is tight on. It sounds like something is loose but I can't find it.

For the life of me I can't find out where this noise is coming from? Any ideas.
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Old 20th March 2019, 06:34   #2
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I had an annoying rattle that resonated at 2000 revs, no matter what gear. I was certain that it was the heat shield on the rear exhaust and as you did, took them off and reseated them, to no avail.

When I was trying to sort out the interior lights on another 75, I found something which caused me to go back to the original vehicle and take out the front interior light fitting. There was a cross member which gives support to the roof. I found at 2000 revs this was the vibration and so rammed some small wooden wedges in there and that has eliminated my rattle.

Good luck.
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Old 20th March 2019, 08:35   #3
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Diesel particulate filters have been known to rattle/resonate at certain times in their operation.
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Old 20th March 2019, 09:20   #4
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Quote:
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Diesel particulate filters have been known to rattle/resonate at certain times in their operation.
Rover 75's don't have DPFs.
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Old 20th March 2019, 09:21   #5
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Quote:
Originally Posted by planenut View Post
I had an annoying rattle that resonated at 2000 revs, no matter what gear. I was certain that it was the heat shield on the rear exhaust and as you did, took them off and reseated them, to no avail.

When I was trying to sort out the interior lights on another 75, I found something which caused me to go back to the original vehicle and take out the front interior light fitting. There was a cross member which gives support to the roof. I found at 2000 revs this was the vibration and so rammed some small wooden wedges in there and that has eliminated my rattle.

Good luck.
I will have a look at that, the rev range is about right. I think it might be a bit lower down, at the moment I am thinking brake heat shield.
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Old 20th March 2019, 10:08   #6
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Quote:
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I will have a look at that, the rev range is about right. I think it might be a bit lower down, at the moment I am thinking brake heat shield.
I had suspected first that rear exhaust shield, then forward shields, then engine bay, and never suspected that the noise was emanating from above my head.

Worth a look.
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Old 20th March 2019, 13:57   #7
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My car had a similar issue there was a vibrating noise at 1850 - 2000 rpm turned out to be the hydramount on the engine. changed that and it went away. Now have another vibration developing I would suggest that could be the gearbox mouth as it's seems to be coming from that area of the car.
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Old 20th March 2019, 14:36   #8
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Rover 75's don't have DPFs.
It won't be that then!
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Old 21st March 2019, 22:15   #9
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Have you checked the backplates on the brake discs?
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Old 30th March 2019, 16:38   #10
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Default springs

have a look at both rear calipers and check if the anti rattle springs are still there, i lost one and Jeeeeez it rattled to death only i motion, sounded like something heavy was about to fall off lol.....but simple fix and only a couple of quid
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