Overheating issue
#1
Overheating issue
I have been driving my Jag very little over the last few months (Due to the Coronavirus lockdown). Today I took it out for a short run and got a warning that the engine was overheating. It was about 95F in Phoenix today. I let it cool then took it the short distance home. The fans were going full blast and coolant was dripping out.
I topped up the coolant and let it cool down completely (several hours).
Tonight, I let it idle in the drive for about 20 minutes. It was about 78F at the time. The engine seemed hot, but I got no warnings. I took it on the road, and the moment I pulled away from the house, the overheating warning flashed on, then went back off. I drove it in stop and go fashion for about 20 more minutes, but it never came back on.
When I got back home, the fans weren't even running and the engine seemed no hotter than usual.
Sticky Thermostat? Or?
I topped up the coolant and let it cool down completely (several hours).
Tonight, I let it idle in the drive for about 20 minutes. It was about 78F at the time. The engine seemed hot, but I got no warnings. I took it on the road, and the moment I pulled away from the house, the overheating warning flashed on, then went back off. I drove it in stop and go fashion for about 20 more minutes, but it never came back on.
When I got back home, the fans weren't even running and the engine seemed no hotter than usual.
Sticky Thermostat? Or?
#3
#4
I had a similar issue a few months ago, and it was a mystery because I could never see where the coolant was leaking. There was a crack in the coolant expansion tank where the hose connects. Car ran absolutely fine until the engine got hot and it pressurized, then a very very fine mist of coolant would spray out of the small crack. Check that out as well. I had to refill the coolant reservoir three or four times before I found the leak, but, hey, I checked "change coolant" off my to do list at the same time.
Replacing the coolant reservoir is really easy if that turns out to be the problem.
Replacing the coolant reservoir is really easy if that turns out to be the problem.
#5
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DlsXK (10-22-2020)
#6
I'd worry if it keeps alerting you of overheating. If coolant is low, it is going somewhere. There is a bleed screw on reservoir that will help get air out of the system when filling. Not sure if that would account for low level, but I had to top off mine this year from sitting and after a heat warning. It has not reappeared. Look for any evidence of fluid loss, white smoke from exhaust, etc. There are dye kits that use UV light to find leaks. If the thermostat is older, change anyway, it is fairly easy to change. It was the 1st thing I did outside of more regular maintenance.
Had an issue with other car where small crack in reservoir just below fill marks. When under pressure, fluid leaked out. Never saw it when sitting, but always low. Car would run hot. After constant top offs and worry about a bigger problem, I removed and inspected tank. Filled with water and found the weep. So make no assumptions. Vehicle common issues and detective work seem like the best avenues.
We get close to 75 degrees here in New England today so I am going to take it for a ride today to get the top down.
Had an issue with other car where small crack in reservoir just below fill marks. When under pressure, fluid leaked out. Never saw it when sitting, but always low. Car would run hot. After constant top offs and worry about a bigger problem, I removed and inspected tank. Filled with water and found the weep. So make no assumptions. Vehicle common issues and detective work seem like the best avenues.
We get close to 75 degrees here in New England today so I am going to take it for a ride today to get the top down.
#7
Overheating
I have been driving my Jag very little over the last few months (Due to the Coronavirus lockdown). Today I took it out for a short run and got a warning that the engine was overheating. It was about 95F in Phoenix today. I let it cool then took it the short distance home. The fans were going full blast and coolant was dripping out.
I topped up the coolant and let it cool down completely (several hours).
Tonight, I let it idle in the drive for about 20 minutes. It was about 78F at the time. The engine seemed hot, but I got no warnings. I took it on the road, and the moment I pulled away from the house, the overheating warning flashed on, then went back off. I drove it in stop and go fashion for about 20 more minutes, but it never came back on.
When I got back home, the fans weren't even running and the engine seemed no hotter than usual.
Sticky Thermostat? Or?
I topped up the coolant and let it cool down completely (several hours).
Tonight, I let it idle in the drive for about 20 minutes. It was about 78F at the time. The engine seemed hot, but I got no warnings. I took it on the road, and the moment I pulled away from the house, the overheating warning flashed on, then went back off. I drove it in stop and go fashion for about 20 more minutes, but it never came back on.
When I got back home, the fans weren't even running and the engine seemed no hotter than usual.
Sticky Thermostat? Or?
you have all peaces you wont find this part any where take your vin number to dealers parts department when you buy its about $187.00
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#8
Overheating
At first I thought that I was going to get all the problems every one was having with this car they had to jump start the car that day drove it for a week no problems then sometimes it didnt want to start so I looked at the most important things to this car and thats the key change the battery $6 at auto zone have no problems I take 400 trips miles from Dallas to Laredo 800 miles round trip no problems I love my car this car is not for everyone Its made to go fast I do 150
I have been driving my Jag very little over the last few months (Due to the Coronavirus lockdown). Today I took it out for a short run and got a warning that the engine was overheating. It was about 95F in Phoenix today. I let it cool then took it the short distance home. The fans were going full blast and coolant was dripping out.
I topped up the coolant and let it cool down completely (several hours).
Tonight, I let it idle in the drive for about 20 minutes. It was about 78F at the time. The engine seemed hot, but I got no warnings. I took it on the road, and the moment I pulled away from the house, the overheating warning flashed on, then went back off. I drove it in stop and go fashion for about 20 more minutes, but it never came back on.
When I got back home, the fans weren't even running and the engine seemed no hotter than usual.
Sticky Thermostat? Or?
I topped up the coolant and let it cool down completely (several hours).
Tonight, I let it idle in the drive for about 20 minutes. It was about 78F at the time. The engine seemed hot, but I got no warnings. I took it on the road, and the moment I pulled away from the house, the overheating warning flashed on, then went back off. I drove it in stop and go fashion for about 20 more minutes, but it never came back on.
When I got back home, the fans weren't even running and the engine seemed no hotter than usual.
Sticky Thermostat? Or?
you have all peaces you wont find this part any where take your vin number to dealers parts department when you buy its about $187.00
#9
Looking for a good place here in New England to stretch the legs out a bit with +150 being my goal. I do not want to hijack this thread, but since you mentioned TexasDang, any specific precautions taken for the speeds you are hitting? Do you wear any protective gear or do any specific maintenance in prep for this speed. If this sounds like a loaded question it is not. Just want to learn anything I can. What is your top speed? These are limited at 186. Time for a fastest speed in your XK thread..if it doesnt already exist.
Oh, and to keep on topic, I have the Android Torque app and OBDII dongle. I believe it has temps the computer is seeing for intake, coolant, etc. Pretty cheap diagnostic tool and may shed light on where /if temp issue exists. Also has GPS speed logging for the speed tests.
Oh, and to keep on topic, I have the Android Torque app and OBDII dongle. I believe it has temps the computer is seeing for intake, coolant, etc. Pretty cheap diagnostic tool and may shed light on where /if temp issue exists. Also has GPS speed logging for the speed tests.
#10
#11
Top speed 160
Looking for a good place here in New England to stretch the legs out a bit with +150 being my goal. I do not want to hijack this thread, but since you mentioned TexasDang, any specific precautions taken for the speeds you are hitting? Do you wear any protective gear or do any specific maintenance in prep for this speed. If this sounds like a loaded question it is not. Just want to learn anything I can. What is your top speed? These are limited at 186. Time for a fastest speed in your XK thread..if it doesnt already exist.
Oh, and to keep on topic, I have the Android Torque app and OBDII dongle. I believe it has temps the computer is seeing for intake, coolant, etc. Pretty cheap diagnostic tool and may shed light on where /if temp issue exists. Also has GPS speed logging for the speed tests.
Oh, and to keep on topic, I have the Android Torque app and OBDII dongle. I believe it has temps the computer is seeing for intake, coolant, etc. Pretty cheap diagnostic tool and may shed light on where /if temp issue exists. Also has GPS speed logging for the speed tests.
#12
Join Date: Apr 2008
Location: Ottawa, Ontario, Canada
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Yes, do replace the thermostat housing with the metal one.
As for wanting to see your real acceleration and top speed, please be responsible unto others and try that at a race track or airport runway. I've done both. What fun!
Little obvious things like SUSPENSION! (especially condition of bushings) BRAKES! (pads and fluid) TIRES! Oil change before and after, and a coolant flush before. And I went further and changed the fluids in the transmission and differential before and after as well. Yes, some tracks insist you to wear a helmet.
As for wanting to see your real acceleration and top speed, please be responsible unto others and try that at a race track or airport runway. I've done both. What fun!
Little obvious things like SUSPENSION! (especially condition of bushings) BRAKES! (pads and fluid) TIRES! Oil change before and after, and a coolant flush before. And I went further and changed the fluids in the transmission and differential before and after as well. Yes, some tracks insist you to wear a helmet.
#13
Most tracks I've looked into for membership or track day for Jag clubs require helmet (which is no problem) but will not allow convertibles. I was not planning anything over 90 on the street or hwy. Seeing that when I'm cruising in the center lane going 75-80 small econoboxes are whizzing by like I am standing still. Info and reminder on coolant, oil change is helpful. Thx.
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guy (10-22-2020)
#14
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