KA24DE overheating - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

fiskulness · 03-24-2009, 08:24 AM

I am having an issue with my 93 ka24de overheating while just in idle. I swapped the engine from sohc to dohc and redid the dash wiring. The radiator was replaced because the old one was in horrible condition and the thermostat has also been changed. If I let the car sit and idle it will warm up and idle just fine for a couple of minutes then the needle gradually rises. When I drained the coolant; I noticed that orange tinted coolant drained a little.

I have read about people bleeding the cooling system with a bleeder valve? where is it located (if there is one) and could it be a water pump issue?

lflkajfj12123 · 03-24-2009, 09:24 AM

did you put the heater on full blast and jack the front up

fiskulness · 03-26-2009, 08:41 PM

I have not, but I did bleed the system the other day and still over heats pretty quickly. I will try putting the car on some ramps and let it run with the heat turned up.

boske · 03-26-2009, 09:44 PM

Is your fan kicking on when it gets hot? Thats pretty important.

WaNa-DrIft · 03-26-2009, 10:00 PM

I had the same issue...do you have a fan shroud? the fan alone wont help much but when you first put the coolant in...you need to let the system burp so by jacking the front up and running the heat on hi with floor vents that it will help a little but either then that...if its always warm then id just run with out the thermostat..it will always run at around 160 degrees but that is just normal operating temp.

lightsource · 03-27-2009, 02:05 AM

Yeah, rolling without the shroud can def. cause some overheating issues.

What fan are you using? Stock Clutch Fan or Electric??

gprb25 · 03-27-2009, 08:38 AM

The bleeder valve is a screw on the top water neck.

You just need to jack the car up or park on an incline, turn the heater on 4, let the car idle to normal operating temp, then watch the radiator fill hole to see if it "burps". You could also squeeze the upper radiator hose to get some of the bubbles out. When your done, fill the radiator back to the top and put the cap on.

Now, I had the same re-occurring issue with my car a while back. I bled and bled the coolant system just as described above and still had overheating issues. It would drive just fine, but when i came to a stop the temp would creep up almost to the top line. Turns out it was my water pump. Replaced the water pump and haven't had any more issues.

Good luck

03-24-2009, 08:24 AM	#1
fiskulness Join Date: Feb 2008 Location: Midlothian Posts: 7 Trader Rating: (0) Feedback Score: 0 reviews	KA24DE overheating I am having an issue with my 93 ka24de overheating while just in idle. I swapped the engine from sohc to dohc and redid the dash wiring. The radiator was replaced because the old one was in horrible condition and the thermostat has also been changed. If I let the car sit and idle it will warm up and idle just fine for a couple of minutes then the needle gradually rises. When I drained the coolant; I noticed that orange tinted coolant drained a little. I have read about people bleeding the cooling system with a bleeder valve? where is it located (if there is one) and could it be a water pump issue?

03-26-2009, 10:00 PM	#5
WaNa-DrIft Leaky Injector Join Date: Feb 2008 Location: Saint Paul, MN Age: 38 Posts: 113 Trader Rating: (1) Feedback Score: 1 reviews	I had the same issue...do you have a fan shroud? the fan alone wont help much but when you first put the coolant in...you need to let the system burp so by jacking the front up and running the heat on hi with floor vents that it will help a little but either then that...if its always warm then id just run with out the thermostat..it will always run at around 160 degrees but that is just normal operating temp. __________________ Where ohh where to find my love...Silvia, please come to me once more.

03-27-2009, 08:38 AM	#7
gprb25 Zilvia Junkie Join Date: May 2007 Location: Dallas, TX Age: 41 Posts: 596 Trader Rating: (20) Rides Gallery: gprb25 Feedback Score: 20 reviews	The bleeder valve is a screw on the top water neck. You just need to jack the car up or park on an incline, turn the heater on 4, let the car idle to normal operating temp, then watch the radiator fill hole to see if it "burps". You could also squeeze the upper radiator hose to get some of the bubbles out. When your done, fill the radiator back to the top and put the cap on. Now, I had the same re-occurring issue with my car a while back. I bled and bled the coolant system just as described above and still had overheating issues. It would drive just fine, but when i came to a stop the temp would creep up almost to the top line. Turns out it was my water pump. Replaced the water pump and haven't had any more issues. Good luck __________________

03-24-2009, 09:24 AM	#2
lflkajfj12123 Join Date: Apr 2007 Location: 　　　　　　　　 Posts: 8,483 Trader Rating: (20) Feedback Score: 20 reviews	did you put the heater on full blast and jack the front up

03-26-2009, 08:41 PM	#3
fiskulness Join Date: Feb 2008 Location: Midlothian Posts: 7 Trader Rating: (0) Feedback Score: 0 reviews	I have not, but I did bleed the system the other day and still over heats pretty quickly. I will try putting the car on some ramps and let it run with the heat turned up.

03-26-2009, 09:44 PM	#4
boske Zilvia Member Join Date: Jul 2008 Location: PA Age: 39 Posts: 230 Trader Rating: (8) Feedback Score: 8 reviews	Is your fan kicking on when it gets hot? Thats pretty important.

03-27-2009, 02:05 AM	#6
lightsource Zilvia FREAK! Join Date: Jul 2008 Location: Compton, CA Posts: 1,153 Trader Rating: (41) Feedback Score: 41 reviews	Yeah, rolling without the shroud can def. cause some overheating issues. What fan are you using? Stock Clutch Fan or Electric??