What is this part called?

RANDYBURLESON

MEMBER
JAGUAR XJS

'93 XJS 4.0L 6CYL.
I have had problems with losing water.
I believe I have a bad head gasket or cracked head.
Anyway. That leads me to my problem. I have been refilling the water on a daily basis and lost all of my antifreeze. So, when it got below freezing the other day a plate cracked on the back of the cylinder head and now water leaks out as fast as I can put it in.
This plate is on the back of the Cylinder head/block next to the firewall. It is about 6" or so in diameter and is bolted on. What is this part called and where can I get a replacement? How much is it?

3 Replies

CARUNDELL

MECHANIC
602 POSTS

Hey Randy,
Sounds like a freeze plug went. I recommend you stop just adding water as it only makes your troubles worse by causing rust/corrosion in the engine block and head! Antifreeze is designed to inhibit this! As to the cost of the part I really couldn't say, but if it is a bolt up style plug I'm pretty sure only jaguar will have it.

Chris

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Saturday, December 16th, 2006 AT 11:25 AM

FSTRANGER302

MECHANIC
117 POSTS

The part is called a water port cover. It is on the back of the cylinder head and has 6 bolts holding it on. It also has a yellow gasket that will go between it and the block. This would be a dealer part I also have one in my garage as I am a jag mechanic hope this will help

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Tuesday, December 19th, 2006 AT 9:21 PM

GOODSAMARITAN742

MEMBER
12 POSTS

Fstranger302. Question for you ever heard of turbos being put on jags. The only jag w a factory turbo is the xjr. Im buying a 1994 xj12 and wanted to put a turbo on it if it can be done w out lots of fabrication. Also please let me know buy email replay if you take on other people's jags to work (of course depending on what state you are in
goodsamaritan742@comcast. Net

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Friday, April 13th, 2007 AT 3:05 AM