Just did the blower motor swap in my CJ7, and you have to drain parts of the radiator and unhook heater hoses, it says don't forget to burp the radiator when finished. I would imagine that means getting all the air out, but how does one do that?
Greg did pass the time by typing:
Hook it up, start the motor, stop the motor, fill up the radiator again. wash, rinse, repeat. You probably will have to check it one more time after the engine warms up then cools down.
For the OP: If you don't get all the air out then the water/coolant won't circulate and the temp will rise very high. If you've burped it once and the temp stays normal then it's fine.
-John
Wouldn't all the air in the system eventually work it's way out thru the overflow system?
-Bill (remove "botizer" to reply via email)
Wblane did pass the time by typing:
For small amounts of air on a system with an overflow bottle, yes.
Problem is large amounts of air from partially draining the block or pulling the heater core can cause an airlock in some motors and the overflow system only works for a small amount of coolant at a time. It's faster and safer to top off the radiator then run the engine a few seconds to burp out the air.
No.
Some of the hoses run up high and can get air locked. Especially the long run heater hose on the CJ7s.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT'sWblane wrote:
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