Join Date: Sep 2007
Location: Orchard Park, NY
Edit: I wrote this prior to watching that video. The engine in the video is a little different then ours on the XK so not all of those steps are needed. Also, If you dont plan on changing the thermostat, then you really dont need to drain all of the coolant out of the radiator. That would be a waste of time and money unless you plan on flushing the system of all the old coolant.
On the XK, the water pump pulley is pressed on. When you purchase a new water pump, it already comes with a new pulley attached. Its a very easy swap, very straight forward, but working in the cold in your driveway will make it miserable. There are several bolts holding on the water pump, and one of them is behind the idler pulley. So that pulley will have to come off to get to that bolt. Since you dont have to worry about the water pump pulley, you can take off the belt first. There is no need to have the belt on there. After that loosen all the bolts and pull off the water pump. If you have a mechanical fan, this will obviously need to come off first before you can start taking off the water pump. A cresent wrench and spanner wrench is all thats needed to get this off. Once the water pump is off make sure you scrape all the old gasket off of the engine so you get a good mating surface with the new gasket. Install the new water pump and reinstall the idler pulley assembly and belt. Reinstall mechanical fan if you have one and refill the coolant. To refill the coolant, first take off the radiator cap and fill the radiator to the top. Next, turn on the XK with the heat on high. Let the vehicle warm up to normal operating temperature. As the coolant cirulates through the engine, air pockets will come out of the radiator. When this happens slowly refill the radiator. Once all the air pockets are out and HOT air is blowing out of the vents top off the radiator and overflow tank and you are set! While you are at it you might as well replace the thermostat too. Normally the thermostat is located towards the drivers side top of the engine right behind where the upper radiator hose meets the engine. However, on the 4.7 Liter the thermostat is on the bottom of the engine near the passenger side lower radiator hose. If you change the thermostat, your mostlikely going to lose a lot of coolant. Remember the only coolant you can use is the Mopar coolant right from the dealer or zerex g-05 HOAT Coolant.
2007 4.7 Liter XK | Front OME MD Springs w/Superlift Preload Spacer | Rear 4" Superlift Springs | Bilstein 5125 Rear Shocks | JBA UCA's | Rusty's Rear Adjustable Track Bar | Black Rock 997 Wheels | Fred Goeske 1/4 Inch Wheel Spacers | 305/70R17 Goodyear Wrangler MT/R w/Kevlar | Airflow Snorkel | Flowmaster 40 Series Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Rear Powertrax No-Slip | Front E-Locker | Rear Heat/AC Delete
Last edited by 07JeepXK; 12-20-2010 at 08:59 AM.