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WPRO18



Member Since: 13 Feb 2023
Location: London
Posts: 89
 2005 Defender 90 Td5 SW Cairns Blue
TD5 Chirping noise on switch off
Recently had pointed out to me my TD5 makes a chirping noise when I switch it off (only seems to be happening when cars been idling / driving for more than a few minutes. Quick start and switch off, it doesn't happen...).

Google search seems to suggest it's the crankshaft pulley that needs replacing. However is this fairly straightforward / quick job?

I've got a TD5 with factory Aircon, so unsure if that makes things more cramped i.e more things need to come off...
Post #1003704 11th Aug 2023 2:27am
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TexasRover



Member Since: 24 Nov 2022
Location: Paris
Posts: 1085
France 2002 Defender 110 Td5 DCPU Chawton White
Typically yes crackshaft pulley becoming detached internally. Over time it can lead to complete separation which can cause damage. Could also be the belts, but you would hear a chirpy belt under normal running condition

Change is not hard but if you don't have the tools or experience you might run into some obstacles:

-fan removal (tools)
-main crank bolt removal (tools)
-damage of seal on install (experience)
-correcly torqueing crank bolt (tools)

Also I changed mine with an OEM about 2 years ago and could hear it chirp again... It probably takes me an hour to change it out, but looks like I need to do some research on suppliers
Post #1003710 11th Aug 2023 4:48am
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MadTom



Member Since: 10 Sep 2013
Location: Olomouc
Posts: 625
Czech Republic 1999 Defender 130 Td5 HCPU Baltic Blue
It could be auxiliary belt - non-original has the back side smooth, or the rotor oil filter. Both can be a bit noisy. Simple remove the belt and try to run engine for short time and switch off. With removed belt, you can also check all pulleys including the crankshaft one. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo Smile
Post #1003720 11th Aug 2023 7:31am
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geobloke



Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4410
United Kingdom 
Re: TD5 Chirping noise on switch off
WPRO18 wrote:
Recently had pointed out to me my TD5 makes a chirping noise when I switch it off (only seems to be happening when cars been idling / driving for more than a few minutes. Quick start and switch off, it doesn't happen...).

Google search seems to suggest it's the crankshaft pulley that needs replacing. However is this fairly straightforward / quick job?

I've got a TD5 with factory Aircon, so unsure if that makes things more cramped i.e more things need to come off...


As others have said a chirp at shutdown can be the crank harmonic damper pulley or it could be one of the auxiliary belt pulleys. The latter are easy to check, all you need is a 15mm 12 point socket to release the tensioner pulley, remove the belt and spin the pulleys to see if any of the bearings are past their best.

The crank shaft pulley is not a beginner DIY job and requires a big torque wrench and pulley brace tool to oppose it. Being an AC vehicle matters not at all. There is an excellent How to article here http://www.discovery2.co.uk/CrankPulley.html

Some people do the job with the radiator in place and others remove the radiator to make more space and use the opportunity to flush the coolant system at the same time.

Whilst you are there it is absolutely worth checking the radiator fan pulley bearing as well. These will often need replacing about the same time as the crank shaft pulley.
Post #1003770 11th Aug 2023 1:31pm
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WPRO18



Member Since: 13 Feb 2023
Location: London
Posts: 89
 2005 Defender 90 Td5 SW Cairns Blue
Thanks all, greatly appreciate the insight and guidance. I'm going to take the approach I'm said novice here Laughing

I'm more confident in a swift solution so just waiting on the specialist to get back to me and get booked in Thumbs Up

The link has proved very good - thank you for that!
Post #1004017 13th Aug 2023 8:04pm
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