Help,help,Help

thomasgoudie1956 · 9th February 2015, 16:21

Hi,
I am having overheating problems after having no heating in the car.
I replaced water pump, thermostat, and drive belt, also had the coolant system drained and re-filled, replaced the filler cap (140).
The start of the story began with me having no heating after having my back box replaced.
I had the head gasket tested and the pressure's are fine, I then had had the water pump then thermostat replaced which give me my heating back(not as hot as before but at least I got it back). For small journeys it goes' up to the middle on the instrument and stays there, if I drive for about 25/30 minutes it then goes' up to the top and the engine management system says 'engine overheating'?
Has anybody got any idea's as I am not that good on mechanics(in fact rubbish) any help would be brilliant.

Tom

Ps3000 · 9th February 2015, 16:23

Hi - which engine do you have?

johnandchris · 9th February 2015, 16:23

Engine type will help diagnosis.

Dorset Bob · 9th February 2015, 16:25

The OPs profile says that he has a 1.8.

johnandchris · 9th February 2015, 16:29

Good point Bob.
Thermostat stuck closed?
Complete blockage?

roverbarmy · 9th February 2015, 16:30

This THREAD may be useful.

Mike

johnandchris · 9th February 2015, 16:31

If the temp guage is shooting up to the top dont drive it until you have sussed the issue. Poss fan issue, ie not working.

thomasgoudie1956 · 9th February 2015, 16:31

Hi
Its a 1.8

thomasgoudie1956 · 9th February 2015, 16:33

New thermostat, new water pump,

Ps3000 · 9th February 2015, 16:56

One problem is that the temp gauge isn't that helpful - it sits in the middle across a wide range of temperatures.

You can get the actual temp displayed in the panel using this method -

http://www.the75andztclub.co.uk/foru...d.php?t=184514

This is going to help you with monitoring / diagnosis.

There is a common failure on the engine cooling fans. I believe they are 2 speed for the 1.8. There's a resistor attached to the fan which is switched into the circuit when the fan needs to run at slow speed. These often fail.

A test is to start the engine from cold, select the demist option from auto (assuming you have the auto climate controls), then peer through the grill and see if the fan is turning - it should be.

9th February 2015, 16:21	#1
thomasgoudie1956 Newbie rover 75 saloon Join Date: Jan 2013 Location: winchester Posts: 18 Thanks: 3 Thanked 0 Times in 0 Posts	Help,help,Help Hi, I am having overheating problems after having no heating in the car. I replaced water pump, thermostat, and drive belt, also had the coolant system drained and re-filled, replaced the filler cap (140). The start of the story began with me having no heating after having my back box replaced. I had the head gasket tested and the pressure's are fine, I then had had the water pump then thermostat replaced which give me my heating back(not as hot as before but at least I got it back). For small journeys it goes' up to the middle on the instrument and stays there, if I drive for about 25/30 minutes it then goes' up to the top and the engine management system says 'engine overheating'? Has anybody got any idea's as I am not that good on mechanics(in fact rubbish) any help would be brilliant. Tom

9th February 2015, 16:23	#3
johnandchris Loves to post Rover 75 CDTI Join Date: Feb 2013 Location: Westbury Posts: 496 Thanks: 11 Thanked 46 Times in 34 Posts	Engine type will help diagnosis. __________________ 2004 Rover 75 CDTI facelift saloon White Gold

9th February 2015, 16:25	#4
Dorset Bob Senior Citizen Rover 75 2.5 Connoisseur SE,Chrysler 300C,124 Spider, Daytona 955i,Honda XL250 & Royal Enfield 650GT Join Date: Feb 2008 Location: The Kingdom of Wessex Posts: 6,976 Thanks: 2,391 Thanked 2,685 Times in 1,686 Posts	The OPs profile says that he has a 1.8. __________________ Let the good times roll............

9th February 2015, 16:29	#5
johnandchris Loves to post Rover 75 CDTI Join Date: Feb 2013 Location: Westbury Posts: 496 Thanks: 11 Thanked 46 Times in 34 Posts	Good point Bob. Thermostat stuck closed? Complete blockage? __________________ 2004 Rover 75 CDTI facelift saloon White Gold

9th February 2015, 16:30	#6
roverbarmy This is my second home Roverless + 1.7D Sportage Join Date: Aug 2014 Location: East Norfolk Posts: 7,050 Thanks: 729 Thanked 2,021 Times in 1,449 Posts	This THREAD may be useful. Mike __________________ Oil in my veins!

9th February 2015, 16:23	#2
Ps3000 Gets stuck in None at moment Join Date: May 2013 Location: Loughborough Posts: 899 Thanks: 230 Thanked 125 Times in 113 Posts	Hi - which engine do you have?

9th February 2015, 16:31	#7
johnandchris Loves to post Rover 75 CDTI Join Date: Feb 2013 Location: Westbury Posts: 496 Thanks: 11 Thanked 46 Times in 34 Posts	If the temp guage is shooting up to the top dont drive it until you have sussed the issue. Poss fan issue, ie not working. __________________ 2004 Rover 75 CDTI facelift saloon White Gold

9th February 2015, 16:33	#9
thomasgoudie1956 Newbie rover 75 saloon Join Date: Jan 2013 Location: winchester Posts: 18 Thanks: 3 Thanked 0 Times in 0 Posts	New thermostat, new water pump,

9th February 2015, 16:56	#10
Ps3000 Gets stuck in None at moment Join Date: May 2013 Location: Loughborough Posts: 899 Thanks: 230 Thanked 125 Times in 113 Posts	One problem is that the temp gauge isn't that helpful - it sits in the middle across a wide range of temperatures. You can get the actual temp displayed in the panel using this method - http://www.the75andztclub.co.uk/foru...d.php?t=184514 This is going to help you with monitoring / diagnosis. There is a common failure on the engine cooling fans. I believe they are 2 speed for the 1.8. There's a resistor attached to the fan which is switched into the circuit when the fan needs to run at slow speed. These often fail. A test is to start the engine from cold, select the demist option from auto (assuming you have the auto climate controls), then peer through the grill and see if the fan is turning - it should be.