so yesterday my wife was waiting outside my work in the Disco and when I came out I saw lots of liquid on the parking lot. she had waited less than 10 mins but had the truck running with a\c on. probably about 90+ degrees out. check things out and found that the radiator hose down the left hand side of the radiator (facing truck) had blown off. simple fix, but I have let it sit and idle for some time with no problems. it always runs at mid point for temp after less than a couple of minuets. refilled it back up and drove and let it idle with no overheating. is that a common issue?

 

is it a common issue not on a properly running truck, a couple things to consider.
have you or anyone else been working on the truck and could have possible left the hose lose? (you probably would have noticed a leak before now). Is you thermostat opening and allowing proper flow? if both answers are no; I would have to consider the possiblilty that exhaust gases are getting into the system and preasurizing it, and you must know what means.

 

to my knowledge, there has been no work done to the cooling system recently. i have not worked on it anyway. have had the truck for a few months now. 80000+ miles on it. any way to tell for sure if the head gaasket has been replaced? oil was changed about 1000 miles ago and have driven it on a couple of short hiway trips since then without any issues. i will keep an eye on things. thanks for the info.

 

Yeah, only 18 pounds of pressure before the cap blows. Should never be enough to blow a hose off. Check your cap, check your clamp. If the Coolent tank cap is ok and the clamp was working, you have a system building too much pressure. The cap on the tank should of opened before the hose blew though.

 

Photocrimes brings up a good point the preasure relief valve(radiator cap)should have released the system preasure before it blew the hose off.

 

replace all the hoses and thermostat at that mileage and flush the system add new coolant....

 

this man speaks the truth.

 

thank you for all the suggestions. i will see what i can accomplish and hope that it is nothing major, like head gasket issues.

 

If you can obtain use of a scanner it will show you a much more accurate picture than the gauge. My own gauge enters the "normal" range at 135 degrees. By the time it is close to the top of the range we are 235. Now that may not be yours, but there are many posts about the lack of precision of these particular instruments.

 

That hold true for the 2 DII I've check live data for from warm to overheating. It's not a gauge. Think of it as 3 lights: cold, warm, too late.