Loud Rattle on idle

Longdog · 4th June 2016, 11:18

Hi

I appreciate this is probably a difficult question to answer but I have devloped what I can only describe as a loud rattle when the car is at idle. accelerate and it dissapears? Ant ideas on what it could be?

Thanks

T-Cut · 4th June 2016, 11:47

First check is the crankshaft pulley. These are a regular cause of low revs rattling. Easy test is to use a hosepipe to spray water onto the pulley during tickover. The rattle usually quietens down as water lubes the rubber interleaf.

A typical pulley past its best.

They're not cheap, so get a reliable on from DMGRS here on the forum.

TC

Longdog · 4th June 2016, 11:54

Thanks I'll give that a try, thought the engine was going to pop it was that loud?

Longdog · 4th June 2016, 12:08

That didn't seem to make much difference. Obviously not saying it's not the problem tho!

I'm no machanic but I'm not sure I should be driving it like this can I call the AA for a problem like this?

TIA
L

klarzy · 4th June 2016, 12:13

Have you checked your heat shields are not loose and touching the exhaust?

Longdog · 4th June 2016, 12:16

Thanks where will I locate the heat shields? are the under the car or engine bay?

Sorry if I sounds dumb but like I said I'm no machnic?

klarzy · 4th June 2016, 15:23

Quote:

Originally Posted by Longdog

Thanks where will I locate the heat shields? are the under the car or engine bay?

Sorry if I sounds dumb but like I said I'm no machnic?

not dumb...

You will find them dotted along the length of the exhaust, but the usual suspects are at the engine end and rattle against the flexible down pipe just after the turbo...

A couple of large washers or a bit of bending usually fixes them...

Longdog · 5th June 2016, 11:57

Oh well it seems like the timing chain needs replacing!!! Probably beyond economical repair15 hours at £50ph + parts

Rev Jules · 5th June 2016, 12:05

Quote:

Originally Posted by Longdog

Oh well it seems like the timing chain needs replacing!!! Probably beyond economical repair15 hours at £50ph + parts

Please don't say that, what makes you think that, I have the same problem.

Rev

Longdog · 5th June 2016, 12:10

Machanic's just had a look it and altough without stripping down can't be 100% sure is 95% sure thats the problem!!!

4th June 2016, 11:18	#1
Longdog Newbie Rover 75 Saloon Join Date: Oct 2015 Location: Wiltshire Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts	Loud Rattle on idle Hi I appreciate this is probably a difficult question to answer but I have devloped what I can only describe as a loud rattle when the car is at idle. accelerate and it dissapears? Ant ideas on what it could be? Thanks

4th June 2016, 12:13	#5
klarzy This is my second home none but not gone Join Date: Mar 2013 Location: March, Cambs Posts: 16,437 Thanks: 894 Thanked 4,247 Times in 3,025 Posts	Have you checked your heat shields are not loose and touching the exhaust? __________________ [SIGPIC][/SIGPIC]….All praise Bananaswan….

4th June 2016, 11:47	#2
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	First check is the crankshaft pulley. These are a regular cause of low revs rattling. Easy test is to use a hosepipe to spray water onto the pulley during tickover. The rattle usually quietens down as water lubes the rubber interleaf. A typical pulley past its best. They're not cheap, so get a reliable on from DMGRS here on the forum. TC

4th June 2016, 11:54	#3
Longdog Newbie Rover 75 Saloon Join Date: Oct 2015 Location: Wiltshire Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts	Thanks I'll give that a try, thought the engine was going to pop it was that loud?

4th June 2016, 12:08	#4
Longdog Newbie Rover 75 Saloon Join Date: Oct 2015 Location: Wiltshire Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts	That didn't seem to make much difference. Obviously not saying it's not the problem tho! I'm no machanic but I'm not sure I should be driving it like this can I call the AA for a problem like this? TIA L

4th June 2016, 12:16	#6
Longdog Newbie Rover 75 Saloon Join Date: Oct 2015 Location: Wiltshire Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts	Thanks where will I locate the heat shields? are the under the car or engine bay? Sorry if I sounds dumb but like I said I'm no machnic?

5th June 2016, 11:57	#8
Longdog Newbie Rover 75 Saloon Join Date: Oct 2015 Location: Wiltshire Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts	Oh well it seems like the timing chain needs replacing!!! Probably beyond economical repair15 hours at £50ph + parts

5th June 2016, 12:10	#10
Longdog Newbie Rover 75 Saloon Join Date: Oct 2015 Location: Wiltshire Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts	Machanic's just had a look it and altough without stripping down can't be 100% sure is 95% sure thats the problem!!!