When I removed my water pump, there was an o-ring and the remains of another gasket, plus the metal gasket. 2000 XK8.

My replacement pump did not come with any gaskets other than a new metal one. I discussed the parts I need with Gaudin, and they didn't suggest I needed any other parts.

My question is: do I need a new o-ring and the other gasket to install my new pump? Update: the old pump had a cutout for the o-ring, the new pump has no cutout so I think no o-ring needed.

JJTIS crashes on my Windows 7 VM so I can't look there.

Looked at this also, no mention of mystery gasket- could have just been sealant? https://www.jaguarforums.com/forum/x...et-help-57123/

Thanks

 

JTIS says there should be an O ring and a gasket.

Hopefully someone with first hand knowledge can confirm if it was changed but the 2004 info also shows both.

 

First, are the fins metal? If so - this is an aftermarket water pump. Jaguar OEM uses plastic still I believe. If the replacement water pump has the metal fins and came only with the metal lined gasket - that is all that is needed. Do yourself a favor and spend the extra few bucks and use hylomar on that metal gasket (both sides) - I received that tip here on the forum and my replacement water pump w/ metal gasket is bone dry!

Hope this info helps.

 

What is "hylomar"? Never mind. I Googled it.

 

The OE pump in the UK comes with the metal gasket and the O-ring.

JTIS refit procedure:

Install a new water pump gasket and O-ring seal.

Graham

 

I just got a new water pump, it came with an O-ring. Euro Toys (higher performance pump).

 

The water pump on my 99 xk8 did not have the “O” ring when I removed it and the new one did not come with one.

Link JagRepair.com - Jaguar Repair Information Resource

 

My old one had an O-ring but the replacent (white plastic fins) didn't. Works great, no leaks.

 

I installed the pump with the supplied metal gasket, no o-ring, no leaks so far.

The OEM replacement pump I bought from Gaudin had white plastic impeller blades. The original pump had tan plastic impeller blades that were in good condition.

The new pump did not have the divit for the o-ring, so I think the newer replacement pumps do not use it. That means the JTIS manual is correct for pumps with the o-ring divit.

The bearings went bad on the original pump, as the pulley was very wobbly to the touch. With the bearings allowing this movement, the seal gets broken. Occasional low coolant light for about 10K before.

System took about 4 liters (10 total) to refill. Still expect to top up as air pockets get filled.

The lack of a real water temp gauge is a worry when testing, will look into the real gauge product.

Don't know how prone this design is to persistant air pockets.

Thanks to all that responded.

 

Before I installed the RealGauge I shot the engine temps with an IR gun after the new water pump was installed. First at idle, then after progressively more spirited driving. Stayed about 200 - 205. Concerned me a first, because I'm used to boats at 175-180, but a little research led me to believe this temp range is okay. I didn't have any issues bleading the cooling system; I pulled the little pin out of the thermostat, maybe that helped. Just idled with the reservoir tank cover open until she wouldn't burp and take any more fluid.

 

My XK8 has three gaskets on the water pump. The center cycle and then 2 odd shaped rectangles for both sides. I did not receive a metal complete gasket as well. Were there several different methods of sealing the water pump? I replaced the plastic version with the metal finned version.

 

Correction, I did receive a metal gasket. When I removed the pump the metal gasket was so well attached to the pump it didn't look like a gasket was attached. Glad I took the pump off to check. Found the main gasket hard and leaking.