|
||
|
6th June 2019, 16:45 | #51 | |
Gets stuck in
75 Tourer CDT MK2 manual in Glorious Grey Join Date: Jan 2018
Location: Slovakia
Posts: 987
Thanks: 926
Thanked 346 Times in 252 Posts
|
Quote:
__________________
Southern Slovakia Anything can happen in Formula 1 and usually does - Murray Walker 1999 Triumph Trophy 900, Saddlesore 1600, Iron Butt Riders Association #63720 2005 Rover 75 CDT Tourer MK2 |
|
6th June 2019, 18:35 | #52 |
Gets stuck in
MGZT-T Join Date: Oct 2014
Location: Paignton
Posts: 618
Thanks: 278
Thanked 90 Times in 72 Posts
|
Thanks for that Wes, that's a great resource.
Looks like its pointing towards an ECT problem. Do you know where the ECT is located? Also, reading that, it says that if the fan is cycling on and off on a kv6 (as mine seems to be), it may indicate a faulty low speed, perhaps I need a new fan. If that's the case, would it be better to replace the 3 speed fan or fit the newer 2 speed fan? Phil |
6th June 2019, 20:11 | #53 | |
This is my second home
1979 Capri 1.6L, 1982 Capri 1.6L, 2016 Dacia Stepway Join Date: Jun 2009
Location: Dorset
Posts: 8,595
Thanks: 3,496
Thanked 3,397 Times in 2,218 Posts
|
Quote:
The coolant temp sensor is in the middle of the V on a V6, just in front of the thermostat housing. You can get to it by removing the throttle-body and going in from the side/rear, its not as hard as it looks. Did you say you had a new thermostat fitted about 3 years ago, was the sensor changed then? Front left (two wires). Also, have you checked in this area for puddles of coolant? You can test all three fan speeds using THIS method. If you find your fan isn't working on all speeds, you can replace the bushes within the fan motor yourself with just a few clever skills needed. Your fan seems to be working ok by the sounds of things, but if you do end up replacing the fan, I myself fitted the same 3 speed setup. |
|
6th June 2019, 20:21 | #54 |
Vis Whiz
Rover 75 2.5 auto Saloon Join Date: Jun 2007
Location: LEEDS
Posts: 20,591
Thanks: 2,057
Thanked 3,056 Times in 1,621 Posts
|
Two speed fans cycle on and off when A/C is on when the resistor has failed. I have also known a three speed fan cycle on and off when A/C is on when the slow speed has failed due to brush wear.
At no point through this thread has the OP mentioned the fan cycles on and off when A/C is on. This needs to be clarified.
__________________
Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident |
6th June 2019, 20:30 | #55 |
This is my second home
1979 Capri 1.6L, 1982 Capri 1.6L, 2016 Dacia Stepway Join Date: Jun 2009
Location: Dorset
Posts: 8,595
Thanks: 3,496
Thanked 3,397 Times in 2,218 Posts
|
I was meant to say, you can also check the temp sensor is working using the OBD 19 & 7 method. Check the outside temp on the OBD is the same as your coolant temp by using the 19 & 7 procedure, turn key but don't start the car.
|
6th June 2019, 20:36 | #56 | ||
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,394
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
|
Hi Phil,
You say that the temperature increased from 95 to 110 at idle. Mine would struggle to reach 100 under those circumstances so my fan would never start running. I wonder whether Mr. Previous Owner put K-seal in the cooling system making it inefficient. Quote:
Quote:
Simon
__________________
"Whatever is rightly done, however humble, is noble." Sir Henry Royce. |
||
6th June 2019, 20:42 | #57 | ||
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,394
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
|
Quote:
I don't think that's right Wes. Low refrigerant would result in the trinary switch disabling the compressor. Quote:
Simon
__________________
"Whatever is rightly done, however humble, is noble." Sir Henry Royce. |
||
6th June 2019, 21:05 | #58 | |
This is my second home
1979 Capri 1.6L, 1982 Capri 1.6L, 2016 Dacia Stepway Join Date: Jun 2009
Location: Dorset
Posts: 8,595
Thanks: 3,496
Thanked 3,397 Times in 2,218 Posts
|
Quote:
|
|
7th June 2019, 02:57 | #59 |
Gets stuck in
MGZT-T Join Date: Oct 2014
Location: Paignton
Posts: 618
Thanks: 278
Thanked 90 Times in 72 Posts
|
Hi All,
Many thanks for all the above advice, it's very informative. The fan cycles on and off on demist and air con calls. I didn't realise this was an issue so didn't mention it. I assumed a 3 speed fan because there is no visible resistor, however, I have recently seen a picture comparing 2 and 3 speed fans. My fan does have the moulding with 2 screw holes at around 2 o'clock where a resistor could fit, the picture I've seen of a 3 speed fan doesn't have these holes. So it may be a 2 speed with the resistor either missing or mounted elsewhere. There does not appear to be any sign of coolant loss from the V. I think that covers all the above questions. Soooooo..... I guess that means a couple of things. I may have a dodgy sensor in the V (although if that was the case, does that mean I would not get an accurate temperature from the ECM?). I may have a dodgy, or missing resistor, or a dodgy fan? Should I change the sensor? And/or Replace the resistor (assuming I find a 2 speed fan when the bumpers off?) And/or Replace the whole fan assembly. Could I have everyone's views on which of the above, and in which order? |
7th June 2019, 07:27 | #60 |
Vis Whiz
Rover 75 2.5 auto Saloon Join Date: Jun 2007
Location: LEEDS
Posts: 20,591
Thanks: 2,057
Thanked 3,056 Times in 1,621 Posts
|
I have refrained from posting on this thread too much as too many cooks etc, but as you have asked for opinions.
The bracket for the resistor is a red herring, pay no attention to it. both two and three speed fans are fitted to the cowling with this bracket. My opinion. Your next step is to repair/replace the fan, so its a bumper off job. Then you need to identify the type of fan. Two speed will almost certainly be a resistor fail BUT it could be the relay in the control box ( also a bumper off job.) Three speed will almost certainly be brushes worn away but equally small chance it could be a relay fail. Once you have identified the fan type and proved the relays to be good you have a number of options the choice is yours: Three speed: 1, Attempt replacement of brushes: An amount of mechanical aptitude is needed along with a high capacity soldering iron. This can usually be achieved if not all the speeds on the fan have failed and is relatively cheap. 2. Replace the fan with two speed and new resistor ( Plug and play) 3. Replace the fan with after market ( Small amount of rewiring) Two speed: 1. Usually changing the resistor solves the fan problem, soldering of the new resistor is advisable as opposed to dry fixings 2. Replace the fan with replacement 2 speed and new resistor ( Plug and play) 3. Replace the fan with aftermarket. ( Small amount of rewiring} Once you have rectified the faulty fan you can then move on but as SD1too says there could be further issues but then again there may not.
__________________
Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident Last edited by stocktake; 7th June 2019 at 11:18.. |
|
|