Strange overheating problem

[Videlicet]

After bleeding it again, the overheating seems to have stopped. However the hose going to the radiator split today and spilled coolant everywhere. I replaced the hose and refilled the coolant. I had to bleed it again. Hopefully that is the end of it. I'm not sure why the hose broke, it might have been weakened from the overheat

[brndck]

Originally Posted by Videlicet

After bleeding it again, the overheating seems to have stopped. However the hose going to the radiator split today and spilled coolant everywhere. I replaced the hose and refilled the coolant. I had to bleed it again. Hopefully that is the end of it. I'm not sure why the hose broke, it might have been weakened from the overheat

if its old enough to be damaged by 230*, you better look into replacing every single other coolant line as well.

[mav1178]

Originally Posted by Videlicet

I was driving my car after replacing the transmission, then I parked it for a few minutes leaving the engine running. To my surprise smoke suddenly started coming out of the hood. I quickly turned it off, the temperature gauge had very quickly skyrocketed. Right after that, a plastic connector between two hoses broke, and sprayed out coolant everywhere.

The connector was old and probably gave out under the heat, but the car had overheated before that happened. I replaced that piece but of course the car continued to overheat.

Now usually overheating is something simple like the water pump, or thermostat. My car does not have a thermostat, so the coolant should run freely through there, and I just changed the water pump yesterday, and it still overheats. Today I checked all the hoses and the radiator for clogs. Any ideas on what this might be?

My car is a 240sx S13 1991, with a KA24DE, it's more or less stock aside from an exhaust, a cold air intake, and a CX Racing radiator. The previous owner of the car must have removed the thermostat, and also he seems to have wired the radiator fan to continuously run regardless of oil temp. It's always run cold before, but now it overheats within minutes of driving.

Originally Posted by S14rebuild

Why would u be so concerned with the radiator cap when the op has posted he has coolant flow/air in the system causing over heating

I'm gonna quote OP's post for reference.

I asked about the radiator cap because something caused excessive pressure buildup in the coolant system. An old/reused/bad radiator cap could be the cause of this and is often overlooked, not to mention I have personal experience from this 20 years ago.

He specifically said "the car had overheated before that happened " (the connector broke) and never ruled out the radiator cap. A bad radiator cap can also cause air pockets to boil over and cause overheating, especially at idle.