Disconnect battery, the first time you lay a wrench across the posts you'll understand why...Drain radiator. If petcock at bottom of radiator doesn't work, pull the bottom radiator hose. You will probably want to remove the radiator rock-guard under bumper first. LOTS more room to work. Just pop out the plastic retaining pins and slide it under the vehicle out of your way. *TIP* DO NOT lay under the hose b/c it's easier to reach, keep your mouth closed, and have the catch pan for the coolant already under the vehicle. While you are down there, look for an inline connector on the trans. cooler line(near center bottom of radiator). Use two wrenches to disconnect these and have something clean to plug the line with, it WILL leak. Disconnect top rad. hose and overflow hose(located on base of radiator fill). Disconnect the TOP trans. fluid cooler line. Remove four fan shroud retaining bolts. Don't lose. Remove radiator mounting bolts(2). Lean the fan shroud against the pulleys/belt and remove the radiator. Three hands would be nice right now as you will need to wriggle the trans cooler line around the shroud mounts and lower trans cooler line to get it out. Be patient, it WILL come out. Remove the fan shroud from vehicle. Loosen the clutch fan bolt w/ a clutch fan wrench( lg. Channel Lock) or a lg. crescent wrench. Serpentine belt might hold it tight enough, might not. If not, remove belt and use a strap wrench to hold onto the water pump pulley while loosening clutch fan bolt. Probably has reverse threads. Righty loosey instead of lefty loosey. Now remove the heater core coolant return line from right side of water pump. Look at top of water pump, there is a 1-1/2" hose you will need to loosen so the WP will come out. Start at 12 o'clock position and remove the WP bolts, keeping them in order as you take them out as they are different lengths. ***** You should be able to gently pry the WP away from the engine block now. If not, look for more bolts in the WP. There is one near the top that is easy to miss, hard to see. Now you can clean all the old gasket from the engine block in preparation to put the new WP on.
You will prob be better off getting a new WP as most have a life-time warranty and rebuilts do not. (saved me $57.09!!)Most new WPs will have a thread protector on the pulley that will need to come off. Next you should put a thin layer of high temp RTV(Permagasket, etc.) on the WP and the back of the gasket. Using 1 or 2 of the longer bolts as guides you can carefully re-install the WP to the engine. Torque the WP bolts evenly a little at a time. Go back up to " ***** " and you should be able to reverse order the instructions from there. Remember to use the O ring for the heater core coolant return line. Mine still leaks there but hopefully I'll get that fixed tomorrow, even if I have to get a replacement tube. Good luck.
Jul 12, 2008 |
1999 Dodge Durango