Member Since: 22 Feb 2013
Location: Dorset
Posts: 28
Water pump bolts just sheared.........WTF ?
Blimey.....ive had a run of bad luck someone please help...
I've just done a cam belt service and aux belt change....everything went ok but.........
After putting about 30miles or so on the car i just drove the family into town when i heard a funny noise
..lost power steering
...battery light came on
....coolant came on..
Pulled over and coolant all over the place
Got the car home (towed) and found that all three coolant bolts have sheared, coolant pump has detached from the engine and hit the fan and took out a few blades....
I didnt even touch the darn thing......
Anybody know what happened ? Coincidence ? Or something i did
I cant see anything has siezed everything is free running.....
Had exactly the same on my D3, cam belt and pulley change, 60 miles down the road water pump sheared off!Si
2016 Disco 4 SE Tech
2019 Fiesta ST3
2021 GBS Zero
22nd Feb 2013 7:24 pm
StuF
Member Since: 21 Jan 2013
Location: Lincoln
Posts: 138
I have always replaced my water pump as a matter of course when changing the cambelt - was told it is sensible to do this as the water pump shaft is under tension and releasing and reapplying this tension (removing and replacing the cambelt) can and does cause the water pump to fail.
22nd Feb 2013 7:29 pm
Zebravanman
Member Since: 22 Feb 2013
Location: Dorset
Posts: 28
SantaCruz wrote:
Had exactly the same on my D3, cam belt and pulley change, 60 miles down the road water pump sheared off!
I take it once replaced it was all good ?
Anyone know where to buy just the plastic fan bit
22nd Feb 2013 7:35 pm
nighthawk
Member Since: 24 Jul 2010
Location: Malta
Posts: 1163
StuF wrote:
I have always replaced my water pump as a matter of course when changing the cambelt - was told it is sensible to do this as the water pump shaft is under tension and releasing and reapplying this tension (removing and replacing the cambelt) can and does cause the water pump to fail.
The water pump is not driven by the cambelt but by the Aux belt. Hence I am pretty sure the cambelt does not apply any sort of tension on the water pump. And if removing and replacing the Aux belt can cause the water pump to fail then we would be changing the water pump every time we changed the alternator, removed the fan, or serviced the aircon compressor.
I cannot explain this phenomenon though
Did the aux belt get renewed too? Maybe it was the wrong part? There are 2 belts (one shorter than the other), depending on MY, but I don't know how much shorter it is and if it's possible to accidentally fit the shorter one on an engine needing the longer one. Maybe one of the more experienced folk can shed some lightDennis
2006 Discovery 3 TDV6 Commercial Manual Buckingham Blue
22nd Feb 2013 8:09 pm
Zebravanman
Member Since: 22 Feb 2013
Location: Dorset
Posts: 28
Yes the aux belt was new as well, it went on pretty easy when the tensioner was held, i would have thought that the tensioner would then do its job when released.
I will check the numbers on the belt tomorrow , they looked the same to me, if i was having trouble getting the aux belt on then i could see how it would apply more pressure on the wp, as it went on easily enough i would have thought it was the correct one.
What i am having trouble understanding is the amount of force required to shear off all three bolts.....now thats a worry.
The wp spins freely so did it briefly sieze ?
Also, im going to have a job getting those sheared bolts put of the engine, small drill and reverse extractor ? Or reverse cutting drill bits ? Oh joy...
22nd Feb 2013 8:22 pm
MikeS2005
Member Since: 13 Sep 2008
Location: Midlothian
Posts: 920
Bolts shearing
Hi
Did you have the water pump replaced along with your cam belts out of curiosity as if you did it looks to me like they have been over tightened and the correct torque setting hasn't been used, if this is the case I'd be very concerned that maybe the bolts for the cam belts haven't had the correct torque applied either and this could cause the bolts on the tensioners to fail, bye ,bye engine
I just hope I'm totally wrong
Cheers
22nd Feb 2013 9:13 pm
Zebravanman
Member Since: 22 Feb 2013
Location: Dorset
Posts: 28
No mate i did everything myself ( don't trust garages) everything torqued as per spec, didn't touch the water pump
22nd Feb 2013 10:02 pm
character
Member Since: 01 Jan 2008
Location: wiltshire
Posts: 5781
in the words of elaine page "I know him so well"
22nd Feb 2013 10:12 pm
character
Member Since: 01 Jan 2008
Location: wiltshire
Posts: 5781
well of course you know my opinion for changing the water pump at the same time for £40
22nd Feb 2013 10:14 pm
Zebravanman
Member Since: 22 Feb 2013
Location: Dorset
Posts: 28
Im bloody gobsmacked
Thanks for your support in sharing your stories......i'll order a new pump and try and get hold of another fan
22nd Feb 2013 11:51 pm
Zebravanman
Member Since: 22 Feb 2013
Location: Dorset
Posts: 28
Ill take some photos and post them tomorrow.....
22nd Feb 2013 11:53 pm
Steve D
Member Since: 04 Nov 2012
Location: Essexshire
Posts: 377
Just a thought but if you are going to the trouble of replacing the water pump when replacing the timing belts, why not also change the water pump bolts at the same time?
23rd Feb 2013 8:00 am
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26705
Apart from the darn thing falling off, I don't think there have been any reports of the pump itself failing. So maybe just replace the bolts?
23rd Feb 2013 8:07 am
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20733
StuF wrote:
I have always replaced my water pump as a matter of course when changing the cambelt - was told it is sensible to do this as the water pump shaft is under tension and releasing and reapplying this tension (removing and replacing the cambelt) can and does cause the water pump to fail.
This is true. However, the TDV6 water pump is not run off the cambelt.
nighthawk wrote:
The water pump is not driven by the cambelt but by the Aux belt. Hence I am pretty sure the cambelt does not apply any sort of tension on the water pump. And if removing and replacing the Aux belt can cause the water pump to fail then we would be changing the water pump every time we changed the alternator, removed the fan, or serviced the aircon compressor
This is also true. Even highlighted part of it to make it clear
character wrote:
in the words of elaine page "I know him so well"
character wrote:
well of course you know my opinion for changing the water pump at the same time for £40
This is not water pump failure, so replacing the pump would have had no effect...
The bolts may well have sheared when trying to replace the pump. We will never know
Gareth wrote:
Apart from the darn thing falling off, I don't think there have been any reports of the pump itself failing. So maybe just replace the bolts?
In 8 years, I have seen 1 water pump leak. Have never seen any shear the WP bolts.
AFAIK, there is only 1 belt for a TDV6, as they all have the same aux belt layout. There is more than 1 option for an RRS, as some came with ARC, and so have an extra pulley to go roundMy D3 Build Thread
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
