I just barely changed my water pump. took it for a test drive and all went well. when i pulled into the driveway the temperature rose quite a bit and the engine reved itself up past 1000 RPM's. I filled the radiator all the way with coolent and the resevoir. and also there is no hot air when i turn on the heater. I broke my truck. Any anwsers out there?

 

BY "rose quite a bit" how hot did it get? What were the temps while driving and how far did you drive?

 

No problem, you didn;t break your truck.

The correct procedure to fill the cooling system is to fill radiator to the top and the reservoir also. Run truck to normal temperature, it will draw coolant from bottle. Stop motor, DO NOT open radiator cap, you can ONLY fill up by the bottle, Just add some more coolant until it's 2" or 3" above the FILL zone, run truck again. repeat procedure until coolant stays at the mark on bottle (usually 2 or 3 times is enough).

If you open the radiator cap while motor is running you will suck in air and it will not bleed the system. The only way to get it done right is by the reservoir bottle.

Side note: isn't it funny how small is the water pump ? The pulley is almost bigger. When I replaced it once, I bought it before removing old one. I had the dealer clerk check it twice to be sure it was the right one.

 

Did you drain the block any when changing the water pump? If so you might have vapor locked the block, not a big deal though. Loosen the three bolts that hold the upper radiator hose bracket on to the block that has the thermostat under it. Then pull the t-stat out. You probibally will have to fill the block from the hole that the t-stat goes in. Had this same thing happen to a buddy when we put a cam in his truck.

 

I am going to go try all of these suggestions. Thanks for answering so fast. I have filled the bottle and it does not seem to be going anywhere. So I am going to pull out the thermastat and see if there is a vapor lock. when running the temp is staying below what is "normal" for my truck. It has always stayed just below the 200 mark but now it is barely past 140 then jumps up to 240. But why would there be no hot air blowing our. Is my thermo gone?

 

if you have an air bubble in the system to get rid of it. the front of the truck needs to be slightly higher. take off the rad cap and run the truck idle you will see it bubble up and burp to say. thank you.

 

Don't remove the rad cap, here's Dodge Service Manual description:

REFILLING COOLING SYSTEM - 5.9L DIESEL ENGINE
Clean cooling system prior to refilling (Refer to 7 - COOLING - STANDARD PROCEDURE).
1. Close radiator drain plug.
CAUTION: Due to the use of the one-way check valve, the engine must not be operating when refilling the
cooling system.
NOTE: The diesel engine is equipped with two one-way check valves (jiggle pins). The check valves are
used as a servicing feature and will vent air when the system is being filled. Water pressure (or flow) will
hold the valves closed.
2. Fill the cooling system with a 50/50 mixture of distilled water and antifreeze.
3. Fill coolant reserve/overflow tank to the FULL mark.
4. Start and operate engine until thermostat opens. Upper radiator hose should be warm to touch.
5. If necessary, add 50/50 water and antifreeze mixture to the coolant reserve/overflow tank to maintain coolant
level. This level should be between the ADD and FULL marks. The level in the reserve/overflow tank may drop
below the ADD mark after three or four warm-up and cool-down cycles.
ADDING ADDITIONAL COOLANT
The use of aluminum cylinder blocks, cylinder heads and water pumps requires special corrosion protection. In
order to maintain the required protection for these components and cooling system performance, only use the
appropriate fluid (Refer to LUBRICATION & MAINTENANCE/FLUID TYPES - DESCRIPTION) when servicing the
vehicle. This coolant offers the best engine cooling without corrosion when mixed with 50% distilled water to obtain
a freeze point of -37°C (-35°F). If it loses color or becomes contaminated, drain, flush, and replace with fresh properly
mixed coolant solution. This coolant offers the best engine cooling without corrosion when mixed with 50%
distilled water to obtain a freeze point of -37°C (-35°F). If it loses color or becomes contaminated, drain, flush, and
replace with fresh properly mixed coolant solution.
CAUTION: Do not use coolant additives that are claimed to improve engine cooling.
Do not remove the radiator cap to add coolant to the system. When adding coolant to maintain the correct level, do
so only at the reserve/overflow bottle. Remove the radiator cap only for testing or when refilling the system after
service. Removing the cap unnecessarily can cause loss of coolant and allow air to enter the system, which produces
corrosion.
WARNING: DO NOT REMOVE OR LOOSEN THE RADIATOR CAP WITH THE COOLING SYSTEM HOT AND
UNDER PRESSURE. SERIOUS BURNS FROM THE COOLANT OR HIGH PRESSURE STEAM CAN OCCUR

 

I assume you take the cap off before you start the truck right? I am new to working on my own stuff and am pretty sure I am allergic to burning my face off.

 

Read the instructions well. You open the cap ONLY once to fill, that's it. No more, never again.

 

Yeap, your truck has an air bubble. Run the heater for sure. Don't take the cap off or you will get air in the system. Now that is funny. That's what is wrong with it. Get it up to operating temp, then let it cool. Take cap off and fill back up. Repeat until heat starts coming from the heater. Darn things should have a bleed screw if they are this bad.

 

another way of doing it is by removing the heatter hose that is attached to the head, fill rad with coolant until it starts comming out of the tube, install heater hose, no need to do anything else, doe to coolant comming out of the highest point of the engine. all the air is pushed out.
works every time