I bought a 2004 xjr. It's having over heating problems. I'm getting coolant pushed out of the overflow tank cap. It seems to be building lots a pressure. I'm not getting any coolant in the oil, neither any smoke coming out of the exhaust.
I'm not getting any hot air out of the heater vents.
Sometimes it feels like it is getting hot but then the air cools back down.
Also when I keep the cap off the overflow tank coolant pushed and blows out when I give it some gas.
Or if I just keep the bleeder screw off the overflow it bubbles and pushes coolant out, sometimes doesnt push any coolant or bubbles out, like if it is dried out. It's like a cycle of pushing coolant then bubbles then nothing the. Bubbles and coolant again.

The owner before me replaced the radiator only because it had a dent in the original radiator (""I'm assuming thats why"") so he decided replace it, plus water pump, thermostat, spark plugs. And did a oil change also. Which makes me think he was trying to cover up something major.
He said it's been over heating and he couldn't get the air out after he replaced the radiator.

So I decided to give it what I had maybe thinking I can figure it out.
Well it's becoming a pain it the butt.
I've took the thermostat out thinking maybe I can get the air out. Still over heated.. I'm new to this bleeding out the system and still can't figure out why I even keep trying for this air pocked or how and air pocket can get stuck in the system..

Honestly I'm thinking it's a headgasket but still question it. Because of the heater not being hot even when it's overheating.

So I ended up doing a compression test to see maybe if I can find something.
I'm going to start on the right hand side (passenger side) working my way down towards the firewall then on the left hand side (driver side) towards the fire wall.
I did 5 rotations on each Cylinder.
The engine wanst really warmed up.
My compression where

Passanger. Driver side.
---Firewall side---
140 psi 140 psi
151 psi. 149 psi
149 psi. 150 psi
137 psi. 151 psi
---Radiator side---

I'm not to sure what compression I'm looking in to.
Does anyone know if these compressions are okay?
Or do you think I have a blown head gasket?
I would of picture of a bigger difference in compression if it is blown. But maybe someone on here would know more about it.



I'm going to back track when I first got the car.
Not to sure if any of this will help but I'm going to add this in here

When i picked up the car I was driving down the street I noticed it was overheating and thank God O'Reillys was just down the street and noticed the check engine lights and decided to get the codes scanned. While I let this car cool down. But here where the codes (the battery is bad so I'm summing most of these where because of the low volts., The car didn't start afterwards untill I jumped it.)

P1000
P0332
P1260
P1582
P1632
P1672
P1696
P0171
P0300
P0301
P0303
P0305
P0307
P1313
P1316
P1682
P1799
P1789
B1317

Now back to the pressent time

I've charged the battery and put my icarSoft i930 to it and all the code i got where
P0306
P1316
P0332
P1000


And on my gauge cluster it say

cats system fault
Dsc not available
Driver intervene
Cruise not available.


I know there's a lot but I really like this car and would like to get it to stop overheating and to fix all the warnings so I can drive this daily.

Any help would be appreciated before I tear the heads off this thing.


Drove it around my shop and this happens all the time when it overheats.

 

Welcome to the forums.

 

Welcome to the Forums.

OUCH.

This needs to be in the X350 Tech Section, down the Home page a tad further.

Comps look OK to me.

Water pump impellor failure, maybe, the 4ltr had that issue with that item, but I thought? it was sorted in the 4.2ltr?

Good luck.

 

Welcome aboard.

 

 

welcome to the forum - enjoy!!!

 

Welcome to the Forum.

 

Welcome to Jaguar Forums R.Slawinski,

Good to have you with us.
Enjoy the forum.

If you haven't done so already you should add your car details to your signature to help others to help you.
If you need help with getting around and using the forum follow this link for some help Forum Help

 

Hello,
I'm Really sorry your car is so sick with so many problems. However, in the process of resolving all this, the two of you will be well and truly Bonded for a long time--If, that is, you don't get a belly full and give up.

Welcome to the forms from ElinorB.
(';')

 

Thank you so much for doing that for me!

 

I don't think I'll give up on her. I can't wait to actually drive it when I fix it!

 

Okay I'll try to figure that out. Thanks