Member Since: 21 Sep 2007
Location: Liverpool
Posts: 1398
I spilt some coolant onto the belt once after changing the coolant.
The screech was horrendous - thought the engine was going to shrapnel.I see no ships........
22nd Oct 2020 8:57 am
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Yes I spilled some coolant
Is this very bad?
22nd Oct 2020 10:48 am
aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2459
It won't cause any damage but it's most likely what your sound is, I would try to clean it off of the belts with warm soapy water.
22nd Oct 2020 11:43 am
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
I was going to spray a light mist of wd40 on the inner of the belt until it went?
And try get the bearings?
Or is warm soapy water best?
22nd Oct 2020 11:45 am
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Updating on this:
Below are images of diagnostic after clearing codes and driving again
Noticed gear screen was delayed so I reset the XY sensor. But the auto brake release warning came back straight away.
I notice the screeching reduces when I put my foot on the clutch or go to neutral if this is a clue?
I sprayed wd40 lightly on the belt and the sound seemed to go away for about 200 yards of driving then returned.
Could the squeaky belt be the reason the auto brake release warning is coming on? If so am I ok to spray warm soapy water on it or should I physically hold some sort of brush on the belt while it’s running or take the whole thing off?
22nd Oct 2020 12:35 pm
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Ok I’ve sprayed the belt with hot soapy water and the squeak went but come back very quickly
Sprayed copper grease and it seemed to reduce the squeak.
Is there anything I can do to clean the fan belt without removal?
And the auto release park brake and XY sensor seem to have gone off since yesterday’s oil change and coolant bleed. Could this be related?
22nd Oct 2020 2:17 pm
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Update!
It was the pulley tensioner bearing I think.
Sprayed degreaser all over the belt and let it soak in. Started the engine and it was a screeching sound from that area.
Sprayed wd40 all over the pulley bearing area and it sounds smooth and nice now!
Recalibrated the XY sensor and that seems to be ok now.
Lesson learned coolant shouldn’t be spilled anywhere!!!!
Thanks again all
22nd Oct 2020 4:08 pm
Moo D3 Decade
Member Since: 13 Aug 2010
Location: Wiltshire
Posts: 13899
If it were me I'd change the tensioner just incase it gave way and wrecked the engine.New Defender L663 110 SE (known as Noddy!)
Sold Volvo XC90 R-Design (known as Basil)
Sold - D4 HSE (Known as Gerty)
No longer the Old Buses original owner
231,000 miles and counting
05 S manual owned from March 2005
D4 Face lifted
Still original injectors and turbo
V8 Front brakes
BAS Remap, Allisport Intercooler and deCat
EGRs blanked
T-Max split charge
Hanibal Expeedition rack
Prospeed ladder
Duratrac tyres
IID BT
BAS FBH control
22nd Oct 2020 4:25 pm
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Ok will do!
22nd Oct 2020 4:25 pm
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8088
If you’ve sprayed oil and or grease on the belt I would be changing it ASAP!
Oil and grease is a definite no no for belts of any discription.
Coolant with antifreeze is an excellent paint stripper. It can when others can't,
It will when others won't,
It goes where others don't.
23rd Oct 2020 10:06 am
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Hi again all
So I started it again today and the squeaks are back grrrrr
Cleaned the under and top side with soap and a toothbrush carefully held as it runs. Then flushed the grooves with water.
Sprayed loads of wd40 on the pulleys again from the best angles to get the bearings.
Is there anything else I can do or is it a replacement job?
It was fine until it got coolant on so I’m confident it’s not misaligned etc.
And I am stupid for allowing coolant on I know I know!
23rd Oct 2020 10:21 am
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10362
look at the tensioner when engines running.
Is it flapping all over the place? If yes, replace it. They are a common issue.
You only need 2 or 3 tools.
1/2" long breaker bar to put into the square hole to release belt tension.
A 13mm ?? socket and ratchet to undo the bolt to change
Yup, just change the tensioner and fit a new belt. Not a difficult job. And the reason the squeak is back is that wd40 will temporarily dampen a noisy or failing bearing, but it is too thin to last so when it dries out, noise will come back.
Great for diagnosis, not great for fixing things.I know it's not considered "kind" to say no these days, but no. Just no, ok? And if it's not ok, still no.
23rd Oct 2020 11:11 am
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Ok thanks - can this be done without removing the fan?
23rd Oct 2020 11:15 am
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8088
If you have sprayed the pulleys and belt as you say and it has made no difference if only for a short period I doubt that is where the fault is, usually a quick squirt of oil on the pulley bearing (NOT the belt, use water only for that) will cure or change the sound for a few seconds.
Next candidate is the alternator, - let it develop.It can when others can't,
It will when others won't,
It goes where others don't.
Last edited by M3DPO on 23rd Oct 2020 11:25 am. Edited 2 times in total
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