MEM 302 5.0L

Ok so my car is overheating and boiling coolant everytime i drive it....
what are some causes of this?
i have already change the thermostat, put the front air damp back under the radiator....

is it my 4.10's i have in the rear end? do the extra 800 rpms really affect the temperature that much?
... ok well any input would be nice..
thanks for your help
michael

tmajikman

does it cool down when you drive down the road, you may have a blown head gasket, time for a compression test. Could be a bad fan as well.

MEM 302 5.0L

fan is brand new.......i hope its not a head gasket.....
do the head gaskets just go bad occasionally? cuz i havent even done anything to make it go bad.
like driving it hard or anything...would my timnig being advanced have anything to do with it?

tmajikman

they do just go bad, even on a stock motor unfortunately, especially if it has ever over heated because of a fan or t-stat.

MEM 302 5.0L

yes it overheated, before because of the fan ...
so does the front air damp affect cooling of the engine enough to cause overheating?

mjr46

when does car over heat sitting still or driving down the road????

MEM 302 5.0L

uh, i dont sit still long enough for it to warm up just sitting still...
so i cant say but it DOES overheat with a mix of city drivign from stop to 45 miles per hour, and highway driving (65 to 70 mph)

mjr46

well if it overheats going down the road could be a clogg in the radiator or a problem with the water pump...I've seen the water pump impellers crap out on a few before ...though not as common but possible....to check for flow drop the level in the radiator tank enough so you can view the fins and when the t-stat opens up you should be able to see water rush out the fins....if all that is good and you have a t-stat that is properly installed and your fan is good....if fan where bad it would overheat sitting still and be fine driving down the highway...anyway after all externals are checked then possible a blown head gasket needs to be checked for

MEM 302 5.0L

Ok here is a few parts that are brand new on my car..
water pump,
thermostat,
clutch fan,
front air damp under radiator,

and i can not confirm that it overheats just sitting stilll.
but it does overheat driving in town and on the highway...i dont exceed the speed limit either...
how do i do a compression test to see if its a headgasket? and would low rear gears be the problem..
making the engine rev more to achieve the speed limit...
oh and does advanced timing have anything to do with overheating?

MEM 302 5.0L

ok so my dad just made me feel really dumb..haha
he went outside and just changed the radiator cap...
fixed the problem....from what i can tell so far...