Diesel Water Pump

Andyd358 · 20th March 2010, 14:43

Just got back from garage and they told me the reason my radiator fan is not coming on is that there is no water circulating. All warm water at the top and cold at the bottom end.

They suggest that I change the Thermostat( thats just been done) and the Water pump but they want 3 hours to strip it and have a look ( I have to pay for that) before they can get the warranty company to authorise a repair.

The question i have is that would a failed water pump stop the rad fan comming on? They did say they could not be sure as they could not get a hand on the water pump.

Any suggestions?

BigRuss · 20th March 2010, 14:52

The radiator fan not coming on is more likely to be a faulty fan motor rather than anything else.

Have they tried to get the fan to work directly by using a seperate feed from the battery?

Sounds like they haven't a clue try and see if the warrenty company will deal with the other garages Col suggested in the other post.

Russ

James.uk · 20th March 2010, 14:52

If you select demist in econ mode, the fan should start..

Why didn't the people who changed the thermostat notice the water pump wasn't working? (if that's true) It's part of the same unit..

...

Andyd358 · 20th March 2010, 14:59

beginig not to trust any of the garages. Would do it myself but Ive paid for a warranty so may as well use it.

Andyd358 · 20th March 2010, 15:04

is there a way to test the water pump?

BigRuss · 20th March 2010, 15:41

The waterpumps on the diesels don't normally cause problems.

The M47 diesel can take an age to warm up properly far, far longer than the petrol models because they are a very thermally efficiant engine.

In this weather with it just ticking over it can take 10-15 minutes to get up to temperature. They may not be leaving it long enough

You can use the on board diagnostic display in the IPK to give an accurate temperature readout (see T-cut's recent post) then wait until the temperature gets to the point when the thermostat opens (88C) then see if the radiator core gets hot. If it does then the coolant is circulating normally.

Continue if it is and wait to see if the fan cuts in (often the lower speeds fail but the high speed often still works)

Low speed = 100C Medium speed = 106C High speed = 112C

Russ

Andyd358 · 20th March 2010, 16:09

Just been out and felt the radiator its hot at the top and cold at the bottom the bottom pipes are cool as well. Dont know but to me this sounds more like a blockage.

foxspeed · 20th March 2010, 21:11

just take the rad cap off with the engine running and you will see the (if working) the by-pass coolant from the engine flowing in to the header tank on the top left of it - get someone to rev the engine and the flow in to the header tank will increase with increase in revs

20th March 2010, 14:43	#1
Andyd358 Posted a thing or two JAguar X-Type 2.0d Sport Join Date: Jan 2010 Location: Bedlington, Northumberland Posts: 1,902 Thanks: 2 Thanked 15 Times in 8 Posts	Diesel Water Pump Just got back from garage and they told me the reason my radiator fan is not coming on is that there is no water circulating. All warm water at the top and cold at the bottom end. They suggest that I change the Thermostat( thats just been done) and the Water pump but they want 3 hours to strip it and have a look ( I have to pay for that) before they can get the warranty company to authorise a repair. The question i have is that would a failed water pump stop the rad fan comming on? They did say they could not be sure as they could not get a hand on the water pump. Any suggestions? __________________ This was My MGZT [SIGPIC][/SIGPIC] Going to miss driving it Support Our Troops http://www.helpforheroes.org.uk/

20th March 2010, 14:52	#2
BigRuss Premium Trader 75 CDT Tourer,2.5 Launch Saloon, Omipro MG/Rover (T4) Join Date: Jul 2007 Location: Liversedge, West Yorkshire Posts: 5,418 Thanks: 1,105 Thanked 1,340 Times in 661 Posts	The radiator fan not coming on is more likely to be a faulty fan motor rather than anything else. Have they tried to get the fan to work directly by using a seperate feed from the battery? Sounds like they haven't a clue try and see if the warrenty company will deal with the other garages Col suggested in the other post. Russ __________________ Replacement Key Service http://https://the75andztclub.co.uk/...d.php?t=244732 Full T4 Testbook diagnostics available. Diesel ECU repair and replacement. Options enabled or disabled as required. Diesel X-Power 135 and "160", Rover 1.8T 150 to 160 MG 160 V6 to 177 upgrades available P.M. for details.

20th March 2010, 14:52	#3
James.uk Passed Away 2002 Pale Blue. Rover 75 CDTi Connoisseur auto. 170K miles Join Date: Dec 2008 Location: Near the M67. Posts: 14,509 Thanks: 199 Thanked 585 Times in 397 Posts	If you select demist in econ mode, the fan should start.. Why didn't the people who changed the thermostat notice the water pump wasn't working? (if that's true) It's part of the same unit.. ... Last edited by James.uk; 20th March 2010 at 14:58..

20th March 2010, 14:59	#4
Andyd358 Posted a thing or two JAguar X-Type 2.0d Sport Join Date: Jan 2010 Location: Bedlington, Northumberland Posts: 1,902 Thanks: 2 Thanked 15 Times in 8 Posts	beginig not to trust any of the garages. Would do it myself but Ive paid for a warranty so may as well use it. __________________ This was My MGZT [SIGPIC][/SIGPIC] Going to miss driving it Support Our Troops http://www.helpforheroes.org.uk/

20th March 2010, 15:04	#5
Andyd358 Posted a thing or two JAguar X-Type 2.0d Sport Join Date: Jan 2010 Location: Bedlington, Northumberland Posts: 1,902 Thanks: 2 Thanked 15 Times in 8 Posts	is there a way to test the water pump? __________________ This was My MGZT [SIGPIC][/SIGPIC] Going to miss driving it Support Our Troops http://www.helpforheroes.org.uk/

20th March 2010, 15:41	#6
BigRuss Premium Trader 75 CDT Tourer,2.5 Launch Saloon, Omipro MG/Rover (T4) Join Date: Jul 2007 Location: Liversedge, West Yorkshire Posts: 5,418 Thanks: 1,105 Thanked 1,340 Times in 661 Posts	The waterpumps on the diesels don't normally cause problems. The M47 diesel can take an age to warm up properly far, far longer than the petrol models because they are a very thermally efficiant engine. In this weather with it just ticking over it can take 10-15 minutes to get up to temperature. They may not be leaving it long enough You can use the on board diagnostic display in the IPK to give an accurate temperature readout (see T-cut's recent post) then wait until the temperature gets to the point when the thermostat opens (88C) then see if the radiator core gets hot. If it does then the coolant is circulating normally. Continue if it is and wait to see if the fan cuts in (often the lower speeds fail but the high speed often still works) Low speed = 100C Medium speed = 106C High speed = 112C Russ __________________ Replacement Key Service http://https://the75andztclub.co.uk/...d.php?t=244732 Full T4 Testbook diagnostics available. Diesel ECU repair and replacement. Options enabled or disabled as required. Diesel X-Power 135 and "160", Rover 1.8T 150 to 160 MG 160 V6 to 177 upgrades available P.M. for details.

20th March 2010, 16:09	#7
Andyd358 Posted a thing or two JAguar X-Type 2.0d Sport Join Date: Jan 2010 Location: Bedlington, Northumberland Posts: 1,902 Thanks: 2 Thanked 15 Times in 8 Posts	Just been out and felt the radiator its hot at the top and cold at the bottom the bottom pipes are cool as well. Dont know but to me this sounds more like a blockage. __________________ This was My MGZT [SIGPIC][/SIGPIC] Going to miss driving it Support Our Troops http://www.helpforheroes.org.uk/

20th March 2010, 21:11	#8
foxspeed Loves to post rover 75cdt Join Date: Jan 2010 Location: secret airfield near Leeds Posts: 294 Thanks: 0 Thanked 0 Times in 0 Posts	just take the rad cap off with the engine running and you will see the (if working) the by-pass coolant from the engine flowing in to the header tank on the top left of it - get someone to rev the engine and the flow in to the header tank will increase with increase in revs