Originally Posted by clubairth1

On my 2014 5.0L SC engine I have the latest water pump as #AJ813909.

The front plastic water manifold is #AJ813917. This has smooth seams and not the big square seams ones like this;
IF you have this version change it soon. They will ALL leak. It is a bad design.




The new stuff has smooth seams like this;



There is a second part on the front of the engine that also needs changed for the same reasons.
Jaguar #AJ813865.

The bad square seams.



The improved smooth seam version.





If you replace the rear water manifold the SC has to come off so more expense because of the gaskets needed.

But if your swapping engines that means the engine is out of the car so it would be the ideal time to change it because no need to remove the SC!!

Here is the list of parts for replacing the rear water manifold.
AJ814007 - Rear Water Manifold
C2Z28265 - Throttle Body Gasket
AJ811576 - RH Intake Gasket
AJ811590 - LH Intake Gasket
AJ811948 - SC Top Gasket. This is a big giant square metal gasket and is the most expensive at around $80.

The last thing is I would change the SC oil since the port is on the back of the SC and you can't get to it very well unless the SC is removed and turned upside down.
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