Reservoir cap going bad?

Okay so I changed my thermostat on Saturday (had the truck spike to 221F at the car wash) and the truck now does not go above 204/206 in traffic however when I popped the hood today just to make sure the fluid level was okay and the reservoir looked almost empty! I shat myself and quickly killed the engine (still sitting around 204 idling) then as I was carefully opening the cap there was a release of pressure and the fluid level started coming back up. This to me is weird, so is it the cap or do I have air pockets in my system (can't hear gurgling behind the dash).

If I were you I'd top it up and drive it. It's probably just because it's pressurized which means your cap is working. This is why its suggested to check level while cold. It will overheat if it's not bled correctly. It probably did this before but you never realized it since you werent looking

Just do the inline t-stat mod and never look back.There's nothing like running at a steady 184deg all the time.By far the best money spent on my D2.

devildog01 wrote:

Just do the inline t-stat mod and never look back.There's nothing like running at a steady 184deg all the time.By far the best money spent on my D2.

It is on my list of things to do (probably do it after the Pines), but as of right now I have a snorkel on the way so that is next on the list.

Is it true that it negatively affects MPG?

Thebloody323 wrote:

devildog01 wrote:

Just do the inline t-stat mod and never look back.There's nothing like running at a steady 184deg all the time.By far the best money spent on my D2.

It is on my list of things to do (probably do it after the Pines), but as of right now I have a snorkel on the way so that is next on the list.

Is it true that it negatively affects MPG?

Thats an interesting question... I would say no if anything I'd imagine it takes in more air and would improve detonation.. I need to order the piece I need to reconnect mine...

my mpg sucked before the snorkel and after. stuck around 11mpg.