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Thread: A New Twist On The Engine Temperature Problem

  1. #1
    Senior Member RF900R's Avatar
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    A New Twist On The Engine Temperature Problem

    So I had the same issue as many others on here with the temperature gauge failing to move, so I thought I'd change both the thermostat's, just to be sure sure. The oil cooler thermostat was replaced without any issues, and then onto the engine thermostat. Disconnected all the hoses, but the housing was a little b****r to shift. Eventually got the housing out and took a look inside and immediately found the reason why my engine wasn't getting up to temperature!

    Spot the difference!
    Attached Thumbnails Attached Thumbnails 20181218_133028-01.jpg  

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  3. #2
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    That will solve the problem, next question, why was it taken out in the first place?
    2007 x type 2.2d S 6 speed, 136 ,000 and climbing.

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    Senior Member RF900R's Avatar
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    That's exactly what went through my mind too! I know the previous owner was involved in a collision which has meant a new near side front end has been put on the car (he helpfully left the insurance details in the paperwork when I bought it), but this doesn't phase me, but might explain why the steering pump pulley fell off too! Probably a shoddy repair job. My mate, who's a former Ford mechanic, reckons the water pump (which has since been replaced) might've been shot and taking the stat out kept the engine running cooler.
    2006 X-Type 2.0 SE Diesel Estate: 122,000 miles and climbing!
    Heart of Gold, Nerves of Steel, Knob of Butter.

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    reminds me of the old fords/vauxhalls/bl cars of the 70's as there was no computer then running the fuel mixture just you on the choke
    2005 x type 2.0D estate sport in black

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  7. #5
    Senior Member Lost it's Avatar
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    Problem with doing that is that it simply short cuts the coolant flow. Instead of it going around the motor, it simply takes the line of least resistance. Through the radiator usually. If you are going to do that to try and keep it cool (which won't work btw...) at least only take the guts out of the thermostat and leave the disc in...
    Last edited by Lost it; 10-01-19 at 08:43.
    2001 3.0 SE Auto, Satnav, winter pack. Dark Blue, all the toys.
    2004 3.0 Sovereign Estate. Winter pack. Fixed. For Sale.
    2005 Estate X type 2.2 Sport.
    2000 V8 3.2 XJ8 LWB. "Prom" car. Lovely. Should sell this one too really...
    2005 "AllyCat", 3.0 XJ6 SE.
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    Senior Member RF900R's Avatar
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    Quote Originally Posted by Lost it View Post
    If you are going to do that to try and keep it cool (which won't work btw...) at least only take the guts out of the thermostat and leave the disc in...
    That's the problem though, it did keep the engine cool. Too cool. The gauge never moved and the heater, while warm, was never getting toasty. Both problems solved with the new stat. Just waiting to see what issue pops up next, seeing as someone along the line thought it necessary to remove that stat in the first place.
    2006 X-Type 2.0 SE Diesel Estate: 122,000 miles and climbing!
    Heart of Gold, Nerves of Steel, Knob of Butter.

  9. #7
    Senior Member Lost it's Avatar
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    Unless you know the history, could have been a blocked rad to a dodgy temp gauge.
    2001 3.0 SE Auto, Satnav, winter pack. Dark Blue, all the toys.
    2004 3.0 Sovereign Estate. Winter pack. Fixed. For Sale.
    2005 Estate X type 2.2 Sport.
    2000 V8 3.2 XJ8 LWB. "Prom" car. Lovely. Should sell this one too really...
    2005 "AllyCat", 3.0 XJ6 SE.
    2000 S type 4.0 V8. Latest toy.
    VFR800A and a VFR 800F

    Still beating cancer. Trevor 2, Cancer 0.

    Sure I took the Red pill....

  10. #8
    Senior Member RF900R's Avatar
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    Just before I bought the car the radiator was replaced, so that's possibly the reason. The temperature gauge works fine so no issues there.
    2006 X-Type 2.0 SE Diesel Estate: 122,000 miles and climbing!
    Heart of Gold, Nerves of Steel, Knob of Butter.

  11. #9
    Senior Member Lost it's Avatar
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    Yes. That might well be the reason.
    2001 3.0 SE Auto, Satnav, winter pack. Dark Blue, all the toys.
    2004 3.0 Sovereign Estate. Winter pack. Fixed. For Sale.
    2005 Estate X type 2.2 Sport.
    2000 V8 3.2 XJ8 LWB. "Prom" car. Lovely. Should sell this one too really...
    2005 "AllyCat", 3.0 XJ6 SE.
    2000 S type 4.0 V8. Latest toy.
    VFR800A and a VFR 800F

    Still beating cancer. Trevor 2, Cancer 0.

    Sure I took the Red pill....

  12. #10
    Senior Member RF900R's Avatar
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    A little update - since replacing the thermostat (or in fact installing one), the mpg has gone up from 42 mpg to 50 mpg!!
    2006 X-Type 2.0 SE Diesel Estate: 122,000 miles and climbing!
    Heart of Gold, Nerves of Steel, Knob of Butter.

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