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davidpalfreyman

Member Since: 06 Oct 2010
Location: tanzania
Posts: 67

2009 Defender 110 Puma 2.4 CSW Alpine White

Top end Clicking Ticking

Hello,
This issue was mentioned last week but I mistakenly said that the noise was from the air con compressor. The noise occurs at start up but gets much worse when turning on the AC. There is an intermittent clicking or ticking noise from the area round the air con compressor. It is the kind of noise that a solenoid makes when engaging but this is rapid, 2 or 3 times a second but then it slows down, then gets faster etc etc.
It is really hard to see exactly where it is coming from. I removed and inspected the belt and the tensioner, but all seems fine. It sounds like it is coming from the turbo but then if it was the turbo actuating mechanism but I wouldn't think it would get worse when turning the AC on.
Any advice, ideas or musings gratefully received
Thanks
David

9th Dec 2019 2:01pm

petercassidy

Member Since: 19 Nov 2019
Location: Eastbourne
Posts: 24

2007 Defender 110 Puma 2.4 XS CSW Bonatti Grey

David, did you resolve this issue? Only ask as it seems similar to a noise mine has started making.

31st May 2020 10:19pm

davidpalfreyman

Member Since: 06 Oct 2010
Location: tanzania
Posts: 67

Peter,
I did it resolve it, but not in the way I imagined.
I ordered a new alternator pulley but meantime discovered that the 2 of the 3 rivets that hold the 2 pieces of the top idler pulley were missing. I removed the pulley, and split it in two to find that the bearing was inevitably worn out. Bought a bearing for about £2, put the pulley back together and the noise reduced. After a couple of days, no noise at all. I now have the alternator pulley but have not used it and everything is now OK 4 months on.
If you want any more details, just ask
David

1st Jun 2020 6:32am

petercassidy

Member Since: 19 Nov 2019
Location: Eastbourne
Posts: 24

Thanks David that's very helpful

1st Jun 2020 7:12am

petercassidy

Member Since: 19 Nov 2019
Location: Eastbourne
Posts: 24

I'm not sure if the clicking is supposed to happen or not reading through different threads it was commented on as being "normal" when AC is turned on after startin the engine but it doesn't sound right to me.

1st Jun 2020 7:13am

davidpalfreyman

Member Since: 06 Oct 2010
Location: tanzania
Posts: 67

That is how it started with mine, just when the AC was on and then the noise would stop when I turned the AC off. Then it started to make the noise all the time. Now for several months it is OK again.

1st Jun 2020 10:56am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17372

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

davidpalfreyman wrote:
... 2 of the 3 rivets that hold the 2 pieces of the top idler pulley were missing. I removed the pulley, and split it in two to find that the bearing was inevitably worn out. Bought a bearing for about £2, put the pulley back together and the noise reduced ...

May I ask how you rejoined the two halves of the pulley?

1st Jun 2020 11:25am

davidpalfreyman

Member Since: 06 Oct 2010
Location: tanzania
Posts: 67

Yes, no problem. I used standard aluminium rivets again, but I am keeping an eye on them. The original ones were steel rivets, but they obviously didn't work very well as 2 of the 3 were missing
Dave

2nd Jun 2020 5:42am

andydef90

Member Since: 09 Feb 2015
Location: yorkshire
Posts: 617

2014 Defender 90 Puma 2.2 HT Corris Grey

clicking on a ac unit is normal most cars you cannot hear it

2nd Jun 2020 6:08am

petercassidy

Member Since: 19 Nov 2019
Location: Eastbourne
Posts: 24

Any chance of a photo where this please?

2nd Jun 2020 11:43am

davidpalfreyman

Member Since: 06 Oct 2010
Location: tanzania
Posts: 67

It is the pulley above the fan pulley to the left. between the fan and the AC pulley.
pullet number 2 on the diagram

Click image to enlarge

2nd Jun 2020 5:00pm

petercassidy

Member Since: 19 Nov 2019
Location: Eastbourne
Posts: 24

Great thanks, l have a close look at it tomorrow 👍

2nd Jun 2020 8:29pm

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