Need some help from the group. My 03 STR overheated and puked all of its fluid. My wife had the car, so I didn't experience what happened. She says she got a "Excessive Engine Heat" warning and it started steaming. She was a few blocks from home and got the car home. The next day I filled the tank with water and ran it to see where it leaked from. No apparent leaks - but the system is not pulling coolant from the tank. I let it run a few minutes to get warm and open the thermostat. Gauge got up to normal temp, still not moving coolant. I touched the intercoolers and they were cool to the touch, so assuming no fluid running through.

Scanned for codes and just a P1111, which seems to always be there. No coolant in oil. Belts are fine, water pump is turning. Anybody experience this or have some ideas? Bad thermostat? Damaged water pump? Can I test the thermostat? Thank yoU!

2003 S Type R, stock except for Mina Gallery intake and exhaust. 65k miles.

 

P1111 just means that all of the flags for emissions testing are set. It sounds like you have air in the system that needs to be bled out. I am pretty sure that one of our STR owning, or tech members will be by shortly to help advise you on the process. I would think that the cooling system really needs to be full and absent of air pockets for pressure testing to work, which would be the next step in locating your coolant leak.

 

For it to leak coolant, it would have had to come out of somewhere. So somewhere a leak exists. You will have to find the leak.
A hose is likely the problem. You will have to start pulling off parts to find out which hose. At best it's one of the obvious ones and at worst it's the 'valley hose' that sits under the supercharger; If your car has no history, obligatory you change this hose.
These cars are very well engineered and very reliable, they also have heaps of hoses. My car's a 2002 model. It gets lots of love but in 20 years I've only had to change 3 of the hoses; valley hose (still had a lot of life in it), large diameter right angle (very short) thermostat hose and one of the long RHS hoses that links to the thermostat housing. Many smarter members that are not as lazy as me have changed all hoses.

Thermostat may also be suspect here, they don't last forever, replace that as a matter of course. Make sure you have two new round rubber gaskets to fit on the alloy thermostat housing. Order a few to have as spares.
I think the cheapest branded/high quality thermostat I could find was a VW or Audi part; identical for the Jaguar.

Fortunately it sounds like your wife didn't drive the car in the 'red' zone of the temp gauge.

 

Thanks for the insight everyone. Took it to a shop. They pressure tested it, drove it, let it run, couldn't get it to overheat. Looks like it may have puked through the overflow. Assuming an air pocket. Going to flush and fill and hope for the best...and keep an eye on the gauge. Thanks again.

 

Please be aware the dashboard temperature gauge is deliberately misleading, as detailed at the following link. The needle is centered from approximately 180-230F, so don't rely on the gauge alone. This is from the XK forum, but the general principle is the same on the S-Type:

https://www.jaguarforums.com/forum/x...e-gauge-62813/

Do you have a scanner? I have one that talks to my iPhone via bluetooth. I can use my iphone to display live data. It's much better to catch an overtemp as it approaches the upper end of the "normal" range, before it goes beyond.

 

There is a unique extra step for bleeding the r models. Take out the big five pointed pipe plug that is in the supercharger cooling circuit as you fill. Be careful as it is not the strongest structure. When the system is full it will burb coolant there. The tank bleed screw is prone to breaking also. I leave both out while filling. You can run the engine a bit with the cap off but not those 2 bleed points. The intercoolers should stay fairly cool when the system is working properly

 

One other thing to note is that you must not mix the long-life anti-freeze that is in the car from new with normal blue anti-freeze.
If you do the two types will congeal and you will end up with a thick gloopy substance in the cooling system that will not flow around the system and the car will overheat.
You must only use the correct long life anti-freeze.
Mellow

 

Scottjh9 when I had my STR I never removed that hex plug and had no trouble getting the air out of the system. At least the plug is out where you can get to it.
I just fill and drive the car. Topping the coolant off over the next several days as the system works the air out.
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I've never needed to remove that plug, either, and checking with my local Jaguar parts dept they said they don't in practice supply the seal for it.

 

well according to the workshop manual it says to remove that big plug....having to and should do are 2 different things....apparently.... the jag shop that does not sell the plug either reuses it or does not follow the manual....i like to get the air out the first time and verify full coolant in the supercharger system and removing the plug is the only way

 

Yes you are right and I read the same thing. The real reason I did not remove it was because I don't have a giant hex tool to fit that huge fitting!
After the first time I filled and burped the air I found it was not necessary so I have never removed that plug.
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It's obviously better to change all the coolant & use that plug. Doesn't seem absolutely necessary, depending on one's point of view.

 

agree. I just happened to have a bad experience the first time i did the coolant change. Did not have the manual yet and did not get the air out of the charger cooling system. Saw intake temps at iat2 skyrocket to 200f and freaked out. Got the manual and all went well. Either way getting the air out is the prime concern