When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Temp gauge in mid position and no signs of overheating but the fans run quite a lot. My a/c has a leak so I've been driving with it turned off to save the compressor but that means the fans don't run on a/c demand only coolant temperature. The other day after a normal drive of about 40 miles the fans were running when I stopped. I had also been aware of some odd gearbox behavior, I looked it up and found that the torque converter will lock if the engine temp is high which is what was happening, I also had rather sensitive throttle response.
When I got the car it blew a hose just after I switched off so I replaced it, the pump, thermostat, housing and new coolant. Next time out I'm going to put the code reader on and see what temperature the engine runs at.
2002 in the UK is a 4.2L engine, right? I believe the thermostat should be around 190F, so operating temp should be from high 190s to, say, 215F under normal conditions. In normal driving with some speed and some lights, mine hovers around 199 to 205. And you are right, an OBDII reader will give you an exact reading of the sensor (as opposed to the gauge). Key is also to make sure you filled the system back up with what was already there, and even better if it is the specified fluid (Dexcool)!
It plugs into the OBD-2 port, & it’s a very inexpensive way to have many of the engine functions permanently available and easy to observe while driving.
Too many to list, but include engine coolant temperature, oil temperature, fuel trim readings, etc etc. I have my X60 mounted on the dash at the left edge. It doesn’t obscure forward vision and is easily observed when desired.
There are more elegant temperature gauge solutions that take the place of the central 3 gauges, but for the bang for the buck, the X60 is hard to beat.
the stock temp gauge is just the equivalent of an on-off warning light, and won’t move off the center until the engine is well into overheating territory.
my ‘02 XKR normal temperature ranges from 185 F to 215 F depending on the outside air temperature. Even up into the 220’s F is not going to causing engine damage. My coolant temp always comes down a bit when the airflow over the radiator is helped by speeds over 75-80mph.
BTW, my usual oil temp is usually 16-20 degrees F over the coolant temperature.
Mine runs between about 70C and 90C depending on the temp outside. At the moment it's pretty cold outside so it probably only gets to 70C if that. The faster you drive the colder the engine gets I have found. More airflow over the radiators cools the engine down, big surprise.
It plugs into the OBD-2 port, & it’s a very inexpensive way to have many of the engine functions permanently available and easy to observe while driving.
Too many to list, but include engine coolant temperature, oil temperature, fuel trim readings, etc etc. I have my X60 mounted on the dash at the left edge. It doesn’t obscure forward vision and is easily observed when desired.
There are more elegant temperature gauge solutions that take the place of the central 3 gauges, but for the bang for the buck, the X60 is hard to beat.
the stock temp gauge is just the equivalent of an on-off warning light, and won’t move off the center until the engine is well into overheating territory.
my ‘02 XKR normal temperature ranges from 185 F to 215 F depending on the outside air temperature. Even up into the 220’s F is not going to causing engine damage. My coolant temp always comes down a bit when the airflow over the radiator is helped by speeds over 75-80mph.
BTW, my usual oil temp is usually 16-20 degrees F over the coolant temperature.
Question, my original in dash temperature gague creeps up from coldest to mid range acting like it is reacting to the engine warming up.. Is that normal? Related Question, in cool weather the blower starts right up blowing cold air before the engine heats up. Shouldn't the fan remain off until the coolant temperature has risen enough to blow warm air?
Thank you
Question, my original in dash temperature gague creeps up from coldest to mid range acting like it is reacting to the engine warming up.. Is that normal? ……”
The incremental movement of the gauge does not correspond to the engine temp rising. It’s designed to “mimic” a real gauge , that’s all. The gauge has only 3 real inputs. Cold / Normal / Too Hot
Originally Posted by Markmbaha1
”…….. in cool weather the blower starts right up blowing cold air before the engine heats up. Shouldn't the fan remain off until the coolant temperature has risen enough to blow warm air?
….”
By blower, do you mean the interior heater fan ? It will blow as controlled by the dash heater input switch, not by the engine temp.
if you mean the radiator fan, those will not come on unless either the motor temp is hot enough to require it, or if the a/c is on.
zray, would you mind posting a link to source of the above noted values on coolant temp. Reviewing the total section could reveal more interesting info. Several searches in past have proved unsuccessful from my end. One may think the 4.0L and 4.2l use similar logic? This is much needed info and the allowable temps vary widely. Would have expected the normal running temps to be 195' or bit higher. Generally, higher temps allow leaner mixtures( - fuel trims) and lower temps allow rich (+ fuel trims). Thoughts on this?
I think both of the illustrations I posted are from that training course. Section and page number given in post #4 referenced above.
(Pages #118 & #244)
note: on most warm(er) days, of 75 to 95 F, my coolant temp is normally well into the 190’s F if not higher . Or the 88 C to 93 C range more or less.
The incremental movement of the gauge does not correspond to the engine temp rising. It’s designed to “mimic” a real gauge , that’s all. The gauge has only 3 real inputs. Cold / Normal / Too Hot
By blower, do you mean the interior heater fan ? It will blow as controlled by the dash heater input switch, not by the engine temp.
if you mean the radiator fan, those will not come on unless either the motor temp is hot enough to require it, or if the a/c is on.
Z
Heater fan that blows into the cabin. I'm use to vehicles that will not permit the system to blow cold air into the cabin when it's cold outside and climate control is set to produce heat in the cabin. They simply have a sensor that keeps the cabin fan off until the coolant reaches such a temperature that will warm the cabin. Otherwise the system makes it colder initially by immediately blowing cold air into the cabin. So your answer is Jaguar does not have the delay in deference to warmer coolant temperature. Meaning the only way to avoid the artic blast is to turn the climate control system off manually until the coolant warms up. Is that an accurate statement?
Thanks so much on both counts.
Heater fan that blows into the cabin. I'm use to vehicles that will not permit the system to blow cold air into the cabin when it's cold outside and climate control is set to produce heat in the cabin. They simply have a sensor that keeps the cabin fan off until the coolant reaches such a temperature that will warm the cabin. Otherwise the system makes it colder initially by immediately blowing cold air into the cabin. So your answer is Jaguar does not have the delay in deference to warmer coolant temperature. Meaning the only way to avoid the artic blast is to turn the climate control system off manually until the coolant warms up. Is that an accurate statement?
Thanks so much on both counts.
that is correct. Cold air will blow if blower is turned on while motor is cold.
Note: I am only going by how my 2002 XKR acts. Other model years may be completely different.
that is correct. Cold air will blow if blower is turned on while motor is cold.
Note: I am only going by how my 2002 XKR acts. Other model years may be completely different.
Z
Thank you. I'm flabbergasted. All the luxury and special features this car has it doesnt have this very simple feature. Its been 35 or more years that I have not had that festure on even modest pontiac for example.
Thank you
Thank you. I'm flabbergasted. All the luxury and special features this car has it doesnt have this very simple feature. Its been 35 or more years that I have not had that festure on even modest pontiac for example.
Thank you
It would appear we all have the feature - it's just not working for some of us (Mine's fine )
Extract from the 1998MY to 2002MY JTIS section on Climate Control - Control Components
NOTE;
The blowers are inhibited until the engine coolant temperature is > 35°C, unless DEFROST is selected.
and from the 2003MY to 2005MY section on Climate Control Description and Control Components
The blower motors pull air from the air inlet and forces it into the plenum assembly where it is mixed and distributed. The blower motors will not operate if the system is in AUTO mode and the engine temperature is low.
NOTE:
The blowers are inhibited until the engine coolant temperature is > 35°C, unless DEFROST is selected.
”……The blower motors will not operate if the system is in AUTO mode and the engine temperature is low.
NOTE:
The blowers are inhibited until the engine coolant temperature is > 35°C, unless DEFROST is selected.
that explains it, I never use the “auto” mode with the heater or A/C.
It would appear we all have the feature - it's just not working for some of us (Mine's fine )
Extract from the 1998MY to 2002MY JTIS section on Climate Control - Control Components
NOTE;
The blowers are inhibited until the engine coolant temperature is > 35°C, unless DEFROST is selected.
and from the 2003MY to 2005MY section on Climate Control Description and Control Components
The blower motors pull air from the air inlet and forces it into the plenum assembly where it is mixed and distributed. The blower motors will not operate if the system is in AUTO mode and the engine temperature is low.
NOTE:
The blowers are inhibited until the engine coolant temperature is > 35°C, unless DEFROST is selected.
That's what I figured. Another littke pita lol problem to troubleshoot. That's OK. Part of the reason I got it. Thank you so very much. Clears that up. Is there a thread on troubleshooting that?
You could start troubleshooting with the in-built diagnostics for the A/C
To check for error codes in the Climate Control System with the internal diagnostics via the ‘Panel
Codes’
1. Ignition off - hold down AUTO and RECIRCULATION buttons and
switch on the ignition
2. press AUTO button - if ZERO shows, there's no stored
error codes
3. press FACE button repeatedly to scroll through stored
fault codes
4. press FACE and HEATED REAR WINDOW buttons together to
clear a fault code.
5. repeat step 4 if there's more than one code
6. press FAN button to exit Interrogation Procedure
How hot should the engine run?
(Mine's fine 
) 