Burping the Cooling System

[LEADFOOT]

A couple of times now, the coolant temp my 06 VHO would blast up to the 240 range. I would pull over and let it cool off and then try to head home again. I would repeat this process a couple of more times then before I get home it drops to normal engine temp and runs fine.

At first I thought that maybe the thermostat was getting stuck and it now gives me the opportunity to swap in a 160 thermostat. I then put in the 160 thermostat and now it pegs the temp gauge. I did check that the thermostat opens in hot water and installing this one backwards would be difficult.

The only other thing I can think of is I must have air in the cooling system. How do you burp the cooling system? Has anybody else had this problem?

[Yello91Silverado]

had the problem when first filled it. took the small hose from the crossover from the head and dropped it below the water level , filled the coolant system till all bubbles were gone then re attached hose.

[ducky]

had the problem when first filled it. took the small hose from the crossover from the head and dropped it below the water level , filled the coolant system till all bubbles were gone then re attached hose.

What he said. Right in the front of the engine on the top below the front of the intake is where to burp it

[RipsnortMN]

Fill it through the top water neck on the water pump with one of the coolant crossover fittings loose. I have never had a problem doing it this way.