2000 W reg 1.8 - which fan will I have?

ashy90 · 23rd September 2019, 09:05

Will my 75 have a 2 speed or 3 speed fan?
Its an early car with black sill covers.

SD1too · 23rd September 2019, 09:27

The 1.8 engine always had a 2 speed fan Ash.

Simon

ashy90 · 23rd September 2019, 11:21

Ok thats good to know.
I have recently bought a 75 - my first 75 after owning many other Rover models. The head gasket had failed so I have replaced that.

Running it up to temperature the fan does not come on, or hasn't yet.
I have tested the fan works on 2 speeds. One speed when I put the A/C on, and a higher speed when I bridge the A/C trinary switch. I wasn't sure if maybe it was a 3 speed fan and the lower speed is not working perhaps.

Maybe I just need to leave it running longer now I know its a 2 speed fan.
Will any diagnostic machines read engine temperature?

suzublu · 23rd September 2019, 11:37

Hi and welcome to 1.8 K series ownership

You can run the OBD for the correct engine temp thus https://the75andztclub.co.uk/forum/s...ad.php?t=55585
The numbers 19 then 7 are the crucial ones for temp.
Also, you can test the fan by turning the aircon off, then press the demist button. Go to the front of the car and see if the fan is working.

ashy90 · 23rd September 2019, 11:59

Pretty sure mine doesn't have a demist button, unless you mean heated rear screen?

suzublu · 23rd September 2019, 12:02

Quote:

Originally Posted by ashy90

Pretty sure mine doesn't have a demist button, unless you mean heated rear screen?

Which one do you have?

SD1too · 23rd September 2019, 12:11

Quote:

Originally Posted by ashy90

Running it up to temperature the fan does not come on, or hasn't yet.

The 1.8 engine doesn't trigger the first (low) speed until the coolant temperature reaches 104˚C.

Quote:

I have tested the fan works on 2 speeds. One speed when I put the A/C on ...

That shows that your first (low) speed is working. You therefore don't need to do the demist test. You already have the answer!

Simon

ashy90 · 23rd September 2019, 12:14

Its the basic model I have with 3 dials.

So it may well be that the engine just wasn't hot enough to trigger the rad fan.
I just dont want it to overheat waiting for the fan to come on!

I'll check the temperature in the diagnostic mode.

ashy90 · 4th October 2019, 10:45

Ive just done that instrument cluster diagnostic test and the fan did cut in at 104 degrees and it dropped to approx 88 degrees so all seems good.

Lets hope this head gasket lasts longer than 1000 miles this time.

SD1too · 4th October 2019, 11:24

Ash,

To avoid confusion in the future, could you update your profile to reflect the 75 you are enquiring about?

Thank you.

Simon

23rd September 2019, 09:05	#1
ashy90 Avid contributor MG ZT 160 V6 Join Date: Jul 2012 Location: West Sussex Posts: 132 Thanks: 1 Thanked 8 Times in 7 Posts	2000 W reg 1.8 - which fan will I have? Will my 75 have a 2 speed or 3 speed fan? Its an early car with black sill covers.

23rd September 2019, 09:27	#2
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,344 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	The 1.8 engine always had a 2 speed fan Ash. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

4th October 2019, 11:24	#10
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,344 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	Ash, To avoid confusion in the future, could you update your profile to reflect the 75 you are enquiring about? Thank you. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

23rd September 2019, 11:21	#3
ashy90 Avid contributor MG ZT 160 V6 Join Date: Jul 2012 Location: West Sussex Posts: 132 Thanks: 1 Thanked 8 Times in 7 Posts	Ok thats good to know. I have recently bought a 75 - my first 75 after owning many other Rover models. The head gasket had failed so I have replaced that. Running it up to temperature the fan does not come on, or hasn't yet. I have tested the fan works on 2 speeds. One speed when I put the A/C on, and a higher speed when I bridge the A/C trinary switch. I wasn't sure if maybe it was a 3 speed fan and the lower speed is not working perhaps. Maybe I just need to leave it running longer now I know its a 2 speed fan. Will any diagnostic machines read engine temperature?

23rd September 2019, 11:37	#4
suzublu This is my second home rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009 Location: Seaton Carew Posts: 26,912 Thanks: 65 Thanked 7,142 Times in 4,642 Posts	Hi and welcome to 1.8 K series ownership You can run the OBD for the correct engine temp thus https://the75andztclub.co.uk/forum/s...ad.php?t=55585 The numbers 19 then 7 are the crucial ones for temp. Also, you can test the fan by turning the aircon off, then press the demist button. Go to the front of the car and see if the fan is working.

23rd September 2019, 11:59	#5
ashy90 Avid contributor MG ZT 160 V6 Join Date: Jul 2012 Location: West Sussex Posts: 132 Thanks: 1 Thanked 8 Times in 7 Posts	Pretty sure mine doesn't have a demist button, unless you mean heated rear screen?

23rd September 2019, 12:14	#8
ashy90 Avid contributor MG ZT 160 V6 Join Date: Jul 2012 Location: West Sussex Posts: 132 Thanks: 1 Thanked 8 Times in 7 Posts	Its the basic model I have with 3 dials. So it may well be that the engine just wasn't hot enough to trigger the rad fan. I just dont want it to overheat waiting for the fan to come on! I'll check the temperature in the diagnostic mode.

4th October 2019, 10:45	#9
ashy90 Avid contributor MG ZT 160 V6 Join Date: Jul 2012 Location: West Sussex Posts: 132 Thanks: 1 Thanked 8 Times in 7 Posts	Ive just done that instrument cluster diagnostic test and the fan did cut in at 104 degrees and it dropped to approx 88 degrees so all seems good. Lets hope this head gasket lasts longer than 1000 miles this time.