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Thread: 1.9CDTi engine temperature

  1. #1
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    Default 1.9CDTi engine temperature

    Was very cold this morning (-3.5). Noticed that the engine temp guage never reached the usual (between 80 and 90), looked like it was about 70 degrees. The heater was working etc. Ambient temp never seemed to have much effect on the Mondeo TDCi running temp. Is it normal for the CDTi to be so much cooler in cold weather?

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    Ex-Staff Full Member John LE's Avatar
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    Vehicle : Facelift Insignia/Corsa D

    Trim : LE/VXR

    Engine : 2.0 cdti/1.6 Turbo

    Year : 13/07

    Default

    Could be a thermostat sticking open although the VX diesels can take a while to heat up. Take it it was a relativly short journey

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    Was a 25 minute run, 12 miles down M-Way and then across the city in very early morning traffic, so no stop start. Only second day it has been really cold since I got her, and I didn't notice the last time tbh.

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    Ex-Staff Full Member John LE's Avatar
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    Vehicle : Facelift Insignia/Corsa D

    Trim : LE/VXR

    Engine : 2.0 cdti/1.6 Turbo

    Year : 13/07

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    Edit, Just had a think about that, take it out for a decent run and see if will get up to temp at all
    Last edited by John LE; 10th November 2010 at 11:34.

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    Regular Member nokiaman1978's Avatar
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    same prob with mine thermostat gone, will barely reach abouve 70 as soon as i turn on heating temp drops way down, also you will notice your mpg going down.

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    I will take it out for a good run this evening, probably will be higher ambient temperature however. My MPG have dropped over the last few days, but only by one notch on the average scale (down from 42.2 to 41.5).

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    My CDTI 1.9 has been like this since new. I have never seen a drop in MPG though. There have been loads of posts in this forum over the years with many having the same experience. I have never worried about it.

  8. #8
    Regular Member djr69uk's Avatar
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    there are loads of threads about this chap. have a search. they run cold in winter and barely register on the guage - nothing to worry about. heater will draw most of the heat from the bay and keep it cooler still. mpg probably drop might be due to any warming up of car before setting off whilst scraping windows etc..

  9. #9
    Full Member Big Sig's Avatar
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    Sounds to me like the thermostat too, it would also explain the drop in mpg.
    Now I need a turbo to keep up!

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    I actually had not been worried, just curious, but following what has been said about the thermostat, I will keep an eye on it and the mpg. Car is still under Vx warranty, so if it is broke it should be fixed without costing me.

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