My XJ is at the dealership for a coolant leak and the 75k service. I have the 100k warranty, so I'm not too concerned. If it is the water pump, I have asked the dealership to replace any of the plastic tubes that tend to fail on higher mileage XJs. For those that have had a water pump replaced, did the dealership replace or suggest replacing any of the coolant tubes and pipes? Also I have the 5.0 N/A engine. Is was told (which really means nothing) that the 5.0 S/C engine has some aluminum coolant tubes which the 5.0 N/A doesn't. If this is true, I would like to upgrade from the plastic tubes if possible. On example is the crossover tube. The 5.0 N/A & 5.0 S/C have different part numbers for the cross over tubes. Is the 5.0 S/C crossover tube aluminum? I called the dealer and they had plent of stock of the plastic 5.0 N/A crossover tubes, but non of the 5.0 S/C crossover tubes. I was hoping to compare them side by side. Thanks for any info.

 

Do yourself a favor and have the remaining coolant drained, flushed and replaced with new using 60% anti-freeze and 40% distilled water. This will help extend the life of the new pump.

 

From my copy of the 2010/11 XFR workshop manual:




So yes, the S/C 5.0 has a different crossover pipe to the NA 5.0, and I can tell you that my crossover pipe is definitely alloy not plastic.
No chance the S/C alloy pipe will bolt up to the NA engine, the points marked 2 and 4 are very different.

 

OZxfr. Thanks for taking the time to post this information. Definitely not a direct replacement. Do you know which numbers are aluminum? A little cutting and welding might be in order.

 

On the S/C pipe 1, 2 and 4 are alloy and 3 is rubber.

 

You wouldn't happen to have a picture of the XJ hoses? I don't know if the are the same part numbers?

 

Sorry, can't help you there.

 

Got the call from the dealer. Water pump needs replacing, covered by warranty. The car had 70k miles when it needed a new water pump (first one) Not bad in Jag years. They said the cross over pipe was fine (replaced prior), but I should replace the hose from the reservoir to the throttle body..... Cost $268.00us. Ouch! I accepted along with a wheel alignment...$150.00us and I asked for the rear differential oil to be replaced. $129.00us. I passed on the $68.00us wiper blades. I think XJSS posted a better brand wiper available. Next week I will be replacing the transmission fluid, filter and sleeve. I am a firm believer in changing fluids. Already did the power steering fluid last service. Should be good for another 70k miles.