I am changing radiators, because my old one started leaking. Do I have to bleed anykind of air out of anything after the new install?? The Chilton maual says you have top bleed out air to prevent from overheating. Someone lead me toward an answer, please...

 

bump

 

I've replaced, and also had that new one on, and off again, without any bleeding,
and I have never had any problems with overheating, or even going over half.

 

yeah, it's important to bleed the system. perform the bleeding with your heater control set to the warmest. depending on your motor, the outlet pipe on your head (returning to the radiator) may have a bleeder bolt. fill the system up with coolant (i only use the oem stuff) and loosen the bolt til a steady stream poors out. if you can't find a bleeder, you can just squeeze on each of the radiator hoses to force the air out. top-off radiator. run the engine til the fan turns on, let it cool down, then top-off again as needed. make sure you fill up the resevoir too.

 

^^ you can try this or you can run your car for a few mins with the rad cap off, to allow any air bubbles to escape , either way works i guess

 

^^ This and the radiator hose squeeze are the way to go. Just remember to add some coolant as it bleeds. Otherwise you end up with only a 3/4 full system.

 

yeah it is important to bleed them because it can cause overheating...you'll have air pockets inside your cooling system which will cause some overheating...had that happen to my cavalier and it wasnt a good thing at all

 

^^^^ Both are good ways to bleed the system but since you are changing the radiator why don't you also flush the system out. It's simple enough and only takes a few more minutes to do.

 

thanks guys..

 

yep u can bleed it either way.. i like the bleeder bolt instead.... its a size 14mm