Engine/Transmission (1994 - 1998) water pump: gear driven?

[Eric_77]

Okay I threw a belt the replacement alt I put on appears to have had the pulley installed about 1cm to far on so the belt had a weird kink in it that chewed it up.



Anyway solved that problem now I have a different one.



I thought the water pump was gear driven but the temps about 2-3 minutes after throwing the serpentine belt started going up( I never stopped I knew what had happened no ac, gen light on, the whack as belt hit hood) As the guage got up to 210-220 range I turned the heat on and pulled over. Radiator never boiled over. I reinstalled the belt on the side of the road. Now my temp gauge does not do the normal 140-190 swing as it had done since new but it has me concerned about winter operation as the needle never comes upto 140 even in Texas 100 degree weather.



Can you overheat/break a thermostat and did I hurt anything in the motor? Should I change oil coolant? just run it and everything should sort themselves back out(yeah right)?

 

[JGheen]

Hmmmm, could be a couple of things. Check your thermostat, it may have failed or seized. Your water temp sending unit could have failed. But the weird thing is that you said it is running really cool, so that leans me towards a stuck open thermostat. Maybe someone else has experience with a similar issue.

 

[SRadke]

The water pump is not gear driven. It is the smooth pully that runs on the back of the belt just inboard and slightly below the alternator.



Not sure about your temp issue. It's possible the high temp dislodged some crud that is holding your T-stat open or maybe it just stuck open. OH! Just had a flash! You still running the stock T-stat? My 96 had a rubber deal glued to it that came loose and held it open. The heat may have caused the glue to let go.



-Scott

 

[Eric_77]

Yep stock thermo I guess I will open up the system and replace it. I don't have a leak and seems like if you ever loosen the thrmostat housing it leaks down the road.

 

[SRadke]

I've had no trouble with leaks in the thermostat housing on a Cummins. Just put it back together with a thin coat of silicone and it'll be fine. They're way tougher than the cast dome jobs of the V8 gasser day.



-Scott

 

[Bob4x4]

No sealer necessary or recommended,take a close look at where it seals



Bob