I have a 2004 Jaguar X-Type. I am almost 100% certain I have a bad freeze plug. It is pouring out above the transfer case. How do I go about changing that plug out. I can't find a diagram or any information to change this out. Could someone please guide me on how I go about this?

 

https://www.jaguarforums.com/forum/x...acement-77698/

 

Those plugs are not for clean the engine coolant system, just flush the system with coolant flush is will be good enough, you'll be regret if you pull them out!

 

The plug itself is rather straight forward for changing but the difficulty is getting access. You will need to drop the engine assembly and sub frame from beneath the vehicle.
Their are a couple of coolant lines in that area that are close to the exhaust manifold and fail from the heat.
It is rare for a block plug to corrode and leak unless the engine has been run with only water for coolant for a long period of time to cause it to corrode.
Go to the "How To" sticky at the top of the x400 forum and you can download the tech manual to assist you in locating the leak.

 

My thought would be the same; can it be one of the coolant lines leaking, running along the underside of the hose and then down the block, or maybe a leak from the waterpump weephole?

I've only seen one failed freezeplug in 40 years of slinging wrenches, and that was a frozen block.

 

It did have water for a little while. I had a couple leaks that I was tracking but needed to drive the car. A cold front came through didn't think it was enough to freeze but I suppose it's possible. We checked all hoses, the radiator, and thermostat housing all is good. New water pump was installed also. When you put coolant in it pours out after a few seconds and is leaking behind engine above the transfer case. I even took the plenum off and manifold to see if it was the hose underneath and it was not. The only thing left that we can figure is a freeze plug or cracked block. It starts up sounds great drives good. I mean only drove it off trailer into garage. Is there anything else or a hose that I don't know about?

 

I know this is a stupid question, but could your expansion reservoir have a split in it and the coolant is working its way down to where you are seeing it?

 

Nothing is a stupid question at this point. Sometimes the simple things are what is wrong. However the reservoir and all lines that we can see are good. It seems to be coming from the back of the engine or underneath the back of the engine. The two lines going into the firewall aren't leaking either. My friend wants to lower the transfer case so we can see where it's coming from but he has never worked on a Jag so not sure how to go about it. Thank you for your reply

 

At the top of the page is a tool bar with SEARCH if you do an advanced search in the X400 forum you can see what others have gone through to remove the transfer case. Basically it is a lot of effort, you need to pull the axle, cut a chunk of the steel bracket weld and bend the steel bracket away to get to the top fastener. While you are doing all of this there is the danger of damaging the axle seal and the transmission seal. Most don't even attempt unless the transfer case has gone bad.
If you have removed the rear exhaust manifold and catalytic converter then the entire rear side of the engine should be visible with a strong light and some mirrors. Looking at block photos the freeze plug at the rear side of the engine is about 6 inches from the end of the engine and should be visible. From below the transfer case only overhangs the rear of the block by 3/4 of an inch. Just enough to interfere with removal of the last bolt in the oil pan.
There is no part of the block above the transfer case, only the transmission.