Jaguar World Monthly Forum - Engine Temperature not reaching normal.

atann

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Engine Temperature not reaching normal.
09.01.2010 at 19:55:18

I have just read this article on the autoexpress web site when looking to by an X300

Radiator: thermostat failure is common in older models - check for a temperature gauge rising slowly and not reaching 'normal'. It's easy to fix, but troublesome if ignored

My new X300 does not reach normal, could I have this problem?

If I do, what needs to be replaced, also I have a 94 Xj40 Sovereign 4.0 which is going to be scraped, can I use the parts needed from that?

Thanks for the info Alan.

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Jaguar Sovereign X300 1996

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yortonheath Senior Member Offline Nr. Shrewsbury, Shropshire . UK. Posts: 677 shrewsbury Gender:	Re: Engine Temperature not reaching normal. Reply #1 - 09.01.2010 at 20:02:52 if you are scrapping it, I could use an outer headlight . Pm me if ok.
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covkid Senior Member Offline Posts: 555 England Gender:	Re: Engine Temperature not reaching normal. Reply #2 - 09.01.2010 at 20:22:12 atann wrote on 09.01.2010 at 19:55:18: I have a 94 Xj40 Sovereign 4.0 which is going to be scrapped, can I use the parts needed from that? The thermostat on a '94 3.2 / 4.0 litre XJ40 is the same part as on the 3.2 / 4.0 litre X300. [The Jag part number is EBC3621]
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atann Junior Member Offline Posts: 89 Brighton Gender:	Re: Engine Temperature not reaching normal. Reply #3 - 09.01.2010 at 20:52:24 Do you think I need to replace it as I drove it 150miles home when I bought it with no problems and I am getting hot air in the cabin? Alan.
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optimus prime Global Moderator Offline "More than meets the eye" Posts: 157 Monmouth/Glos boarder Gender:	Re: Engine Temperature not reaching normal. Reply #4 - 09.01.2010 at 21:21:18 My 40 and my V12 run usually at the middle but with this inclement weather..then they don't reach anywhere near normal. roly
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2jagsDoug

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Re: Engine Temperature not reaching normal.
Reply #5 - 10.01.2010 at 01:38:26

optimus prime wrote on 09.01.2010 at 21:21:18:

My 40 and my V12 run usually at the middle but with this inclement weather..then they don't reach anywhere near normal.

roly

Usually the middle of the dial represents thermo opening temp or close, so the coolant should get that hot even in sub-freezing ambient conditions

I wonder if you don't have stuck open thermostats as well?

Cheers
DD

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Doug Dwyer
Longview, Washington USA
1995 XJR

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Leo_Denmark Senior Member Offline Posts: 267 Middelfart Denmark. Gender:	Re: Engine Temperature not reaching normal. Reply #6 - 10.01.2010 at 08:17:15 2jagsDoug wrote on 10.01.2010 at 01:38:26: I wonder if you don't have stuck open thermostats as well? Agree, I have been in Sweden in -25°C, and the needle reached the middle without problems. As a matter of fact, the car handled that trip very well
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optimus prime

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Re: Engine Temperature not reaching normal.
Reply #7 - 10.01.2010 at 09:15:56

optimus prime wrote on 09.01.2010 at 21:21:18:

My 40 and my V12 run usually at the middle but with this inclement weather..then they don't reach anywhere near normal.

roly

well the gauges are not that far away from normal I suppose Undecided

But what I was saying is that in this bad weather the gauges read less than they did in warm weather. The other night I was out at midnight picking up my lad from the station...it was very very cold(freezer type cold) heater in car was "warmish" and gauge read less than the "N"maybe by a 2-3 mm.
so stats are OK I would think. Just the cold air hitting the radiator etc. Undecided

maybe I should put a blind on the front grill Cool

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Its a shame we couldn't have gathered just a few laurel leaves!

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Brian Senior Member Offline Posts: 353 east anglia Gender:	Re: Engine Temperature not reaching normal. Reply #8 - 10.01.2010 at 11:23:31 My X300 3.2 normally runs spot on normal, but the last week or so struggles to reach center gauge, heater blows nice and hot I just put it down to the extra cold air through rad. Quick warm up rules out stuck thermostat, as it has got warmer today perhaps tomorrow will see higher reading. Brian
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Daniel_XJR

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Re: Engine Temperature not reaching normal.
Reply #9 - 08.02.2010 at 19:04:46

I had the same problem of temperature not reaching normal in winter (only up to halfway to N in the temp gauge) and reaching normal after a while in summer Shocked

So, I changed the thermostat because of it was 2 years since I changed the coolant (green stuff) and had to fiddle with the engine cooling anyway... Wink

Now the temperature gauge goes quite quickly to normal (even in todays cold weather). The thermostat was completely shot in the open position and it was the culprit. Will see if the fuel consumption lowers to a more sensible level... Wink

Daniel

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Daniel, 1992 XJR, manual gearbox, LHD

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XJ40S Senior Member Offline Posts: 1388 Sheffield Gender:	Re: Engine Temperature not reaching normal. Reply #10 - 09.02.2010 at 12:28:01 I would support Dougs comments in #5. Cheers
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