I just recently bought a Ram Van Conversion and I'm a big ole noob when it comes to these things, could someone please tell me where the thermostat is on these things? Thanks

 

I have a 2000 B3500 V8 -- follow the top radiator hose to the top of the block. The thermostat is located inside that "goosneck" pipe the radiator hose fits on at the top of the block.
Not a fun thing to change, since you have to remove a bunch of brackets to get to it.
Remove all the brackets, remove the top radiator hose, remove the 2 bolts holding the gooseneck on.
It's a miserable job. The thermostat itself is only about $7, but the labor could be as high as 200-300, plus replacing coolant.

 

Thanks!

 

- disconnect the battery terminals.
- loose the belt off with the tensioner
- take the alternator off
- drain the radiator
- take the hose off
- use a socket set with two extensions to undo the bolts to the metal chimney
- more than likely the chimney is corroded and needs to be replaced. The help section at a majority of auto parts stores sells these for under $10. Get a NEW Felpro gasket too!
- clean, clean, clean, and clean again the old gasket from the upper block. I had to actually use fine sand-paper when getting down to the metal without ruining the surface.
- put the new parts back on
- reassemble stuff
- put in the trusty "green" coolant and distilled water ... NEVER use tap water !!!!
- hook up the battery
- turn key
- look for leaks

Hope this helps