Car : 1991 Nissan 240sx Ka24de


Alright I installed a Koyo 4 core radiator and bled it and drove 800 miles, UNCC to Alexandria. then when we got 2 miles from the house the temp gauge started to reach 210 degrees. Then when i got to the house i was at 225 degrees. So i thought prolly some more air? and i went to the bleeder screw turned it and a shit load of air came out.. tightend it back down and then waited 6 hours then went for another drive.. to winchester and back didnt over heat or anything (stop and go traffic). Then we got back to the house it OVer heated to like 220 degrees. so im thinking maybe the thermostat is sticking low and behold it was. so i replaced it and the water pump. and i bled it and burped it. And im still over heating..

Cliff notes.

Installed Koyo 4 core Radiator, waterpump, Thermostat, hoses, and bled it, and overheating.

What can it be?

 

Im not sure how strong the headgaskets are for 240's but thats what I would think if everything that cools your motor is new and you burped the air out of the heater core. But headgaskets are weak in old school supras.

 

what kind of thermostat did you replace the old one with? a used or a brand new one? are you sure the temp sensor is good?

 

thermostat installed with the air burp hole facing up?


get a cooling system pressure tester and start the car and see if you get postive pressure very quickly. if not this rules out mechanical failure of any kind of the head/sealing surface.

 

220 Degrees really isn't that hot, but try a different thermostat.

What kind of coolant are you using and what is the mixture if any?

 

Im 90% certain its hole up, but ill check later tonight.

hopin its not the h/g

 

how hard is it to replace a headgasket on a ka? Can't be that hard. Took me about 2 hours (thats total time) for my b18a.

Course, we talking the difference between honda and nissan.

 

Ive never done a H/G before. And the has to go back down to UNCC by sunday..

 

Check the radiator and make sure it is free of any coatings or blocked. I know a guy who sucked up a plastic bag onto his radiator (in a C5) and it melted and got all in the fins. He went throuh hell trying to figure out what was wrong, then he pulled the radiator and noticed the fins were coated in melted plastic. Somehow the bag had gotten between the condenser and radiator!

Double check the t-stat in my truck it was sticking and caused overheating.

Also what's the normal temp range for your car. My stock t-stat is 192 and the cooling fans don't come on until 225 and 230 for the hi fan. It's how the car is designed to run, so in traffic I'll see 230 coolant temps.

 

Bingo