quick how to on replacing the
thermostat and water pump.

remove thermostat housing via
7mm bolt ( 3 )



remove old thermostat



clean off facing and apply gasket sealant, and
replace with new thermostat



next remove the water pump via 10mm
bolts ( 2 ) - note that it really helps with
access if you remove the airbox if you still
have the oem box



try and dry as much antifreeze from the both
facings as well as remove any old gasket
material



here is the oem and the replacement - odd thing
i noticed was the the oem pump did not have
a seep hole, but the replacement did.



apply gasket sealant to the underside of the
rubber o ring then seat the ring in place. once
that is done apply additional sealant to the top
of the o ring and around the bolt holes just to
be safe, once again ensuring that no sealant
gets on the water pump fins



reinstall the water pump with the oem bolts and
reroute the serpentine belt and wah lah your
done.



hope this helps some peeps :thumbsup:

 

Nice write-up.

 

Was it the original pump, or did you have to change it once before??

Also, where did you notice the leak??

 

it was the original pump. when i was on the dealer lot i looked in
the glove box and it had the 1st owners name on some maintenance
records. i cold called him and talked to him for 20 minutes asking
about the truck in detail as far as history and he said that he
neer changed anything out.

looked like it was leaking from the pulley shaft. 1st thing i noticed
was liquid leaking on the driveway and it was all over the a/c
condesor, crank pulley and around that area. just assumed that
it was the water pump, when i took it off you could see coolant
stain in one spot.

also the new thermostat i put in seems sticky. its a 210 degree
stat and the temp gage goes up to 210, then back down below
200, then up to 210 then back down below 200. it cycles that
way constantly now. thinking about taking it off and getting
another one to see if i just got a bad one. carrying the original
around with me just in case it sticks shut.

 

If it's cycling like that, got a faulty t-stat. BTW, don't believe them when they say it's normal.

 

wow thats a whole lot easier to to than a dmax

 

yeah i helped a bud do it on his 03 the first time
and i was very suprised how easy it was.

 

I guess that remove the thermostat housing to replace the thermostat and water pump...



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