Just completed the install of the Aluminum Coolant Tower , on my 4.2L The unit was great looking and seems to be the option we've been needing. The Rear section mounted ok to the block with the usual attempts on the 2 rear next to plenum. The front piece that mounts to the block with 4 bolts had to be modified . The 4 holes were not adequately spaced to allow the bolts to align w/o threat of cross thread. I used a 13/64" drill to enlarge all 4 holes and my bolts went in block smoothly. I removed the new Temp sensor and replaced the new thermostat since the existing ones worked great .
Some pics. maybe later

 

Sorry to hear about the fitment issues, Kelly. Sure hope the mounting holes enlargement indeed fixed it. Keep us posted....

 

Yes, the part appears leak free and bolted up OK. The 13/64 drill allowed adequate clearance for the 4 Bolts ( 6.25x25mm) to align and thread in without problems. The square rear portion also uses the same bolts. Mitzone has a contact message link so I advised them of the situation and suggested they enlarge the 4 holes to 5.2mm to avid mounting problems. Cross threaded bolts are not my thing :-)

 

Thanks again for a great fix Kelly.
I bet lots of business will be headed their way.

 

Is it this one?

MITZONE Aluminum Engine Coolant Thermostat Housing Water Outlet Assembly Compatible with 2004-2005 Jaguar Vanden Plas XJR XJ8 2003-2005 Jaguar S-Type 2005 Super 4.2L V8 AJ89485

https://a.co/d/0hgzPR4J

 

Mine came from E Bay vendor Autowild Auto, your link led me to a unknown shopping page. I did swap the temp sensor and Stat. the Stat appeared less quality.