[j-rango]

Hey guys . I can't seem to get my coolant system to burp out . I've tried everything I can think of looked at the forums everything it's driving me insane .. it started out i didn't have that great of heat on stage 4 . Replaced the thermostat still the same . Ive tried burping the system like 6 different times . First time I let it warm up and reved at 1500 for 5 or 10 mins let the coolant temp get to 204 degrees ( had my snap on solus edge hooked up so I could monitor everything .) . It was nice and hot . But by the time I made it home (15 min drive ) it had cooled down to the way it was before barely warm almost cold .. so when I got back to work the next day I tried again . This time reving at 2500 rpms coolant peaked 206 at one time .. once again it was nice and hot but by the time I made it home it had cooled off again . So I flushed out the heater core and tried it all again with the same out come. This is driving me insane ! I did notice when I got home that the upper rad hose was scolding hot and the lower was a little warm nothing like the top . Also the same with heater core hoses the one towards the front is scolding hot and the the one towards the rear is only slightly warm . My truck has always been like this . But never once over heated or anything and I let it warm up for 15-30 mins in the morning . It's a 2000 with the 4.7 ( the stupid year with electric and fan clutch ) any ideas please help this is making me insane !!
Thanks in advance!!

Yes I've tried put the front end higher to and still nothing grrrr!

 

[99WhiteRango]

Is your temperature going down while your driving and this is why your having no heat or is your temperature gauge staying the same and no heat?

 

[j-rango]

Temp gauge stays as it should . When ever I go through the burping process it's nice and hot but by the time I'm almost home it gets cooler if I turn the stage down to 2 and it ( feels a little warmer ) anything above that and it's blowing cool air

 

[99WhiteRango]

Did you try flushing the heater core?

 

[j-rango]

Sure did

 

[Don Fox]

JR:
Does your D have the rear heat option, and did you have both systems cranked on high while you burped it?
I have found that it can take 20-30 minutes of running the engine with the burp screw removed and front end elevated to properly burp a 4.7 cooling system.
Your are correct to run the engine up to 1.5-2K several times during the burping process.

Don

 

[j-rango]

Thanks don . I'm leaving work soon so I'm gonna try to burp again while I let it warm up ( purposely parked with the front end higher . ) I only have front heat

 

[MWeed]

Make sure that you have raised the front of your D so that any air flows up towards the top of the radiator, like on jack stands or ramps. Also, what temp thermostat is in there?

 

[FSTDANGO3]

That is best way, get that front end up a bit higher. Burp only thru 1/2" plug not the cap
STEVE