1991 240sx Overheating - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

southfloriida · 02-14-2013, 04:15 PM

I've been battling my KA24DE overheating the past few weeks. The temperature gauge it hits the top line before the "danger zone" in about 30 minutes of driving. I have replaced the thermostat and installed it correctly, made sure of no clogs within the lines entering the engine, made sure coolant is flowing through the radiator at an adequate pace, and installed a new radiator cap. A few notes to add... The belts squeal pretty loud on a cold start, the heat does not work no matter what the temperature of the car is, and at some points I can hear water sloshing in the area of the heater core. I am not very mechanically inclined so any suggestions will be very much appreciated. Thanks in advance.

KiLLeR2001 · 02-14-2013, 05:27 PM

Sounds like there is still air in the system. Any leaks going on?

towlie · 02-14-2013, 05:33 PM

Replace the belts, inspect the water pump, properly bleed the coolant system (search), check the rad hoses for cracks/pinholes, check the rad aswell

Ryanswartout · 02-15-2013, 12:15 AM

towlie is prolly right with bleeding the system, jack the front of your car up a little then fill your radiator with water, then open you bleeder valve (its on the water neck going into the head) squeeze your top and bottom hoses a little and fill the radiator until water comes out that little screw. you will have to use a funnel on your radiator bc you will need your water lv into the radiator to be higher than that little bleeder screw.

jdm213 · 02-15-2013, 12:23 AM

heres also another possibity ..... maybe ur thermostat is defective sometimes they dont open up ..... remover your water pump and check ifs old and worn out and retire it.... while ur inspecting the water pump its wise to replace ur belts or reuse if its still good and tighten them right do they dont squeel .. impretttty sure ur belt squeeks beacuse of your water pump it looks like its spinning the pump but if you could imagine it inside the blades are not spinning u shud remove it and investigate this further this a very easy fix hope this helps

southfloriida · 02-15-2013, 06:03 AM

I will try bleeding the system today and give an update once I finish. Thanks for the suggestions so far.

02-14-2013, 04:15 PM	#1
southfloriida Join Date: Jan 2013 Location: SWFL Age: 28 Posts: 7 Trader Rating: (0) Feedback Score: 0 reviews	1991 240sx Overheating I've been battling my KA24DE overheating the past few weeks. The temperature gauge it hits the top line before the "danger zone" in about 30 minutes of driving. I have replaced the thermostat and installed it correctly, made sure of no clogs within the lines entering the engine, made sure coolant is flowing through the radiator at an adequate pace, and installed a new radiator cap. A few notes to add... The belts squeal pretty loud on a cold start, the heat does not work no matter what the temperature of the car is, and at some points I can hear water sloshing in the area of the heater core. I am not very mechanically inclined so any suggestions will be very much appreciated. Thanks in advance.

02-14-2013, 05:27 PM	#2
KiLLeR2001 Post Whore! Join Date: Jun 2007 Location: オーランドフロリダ Posts: 7,955 Trader Rating: (46) Feedback Score: 46 reviews	Sounds like there is still air in the system. Any leaks going on? __________________

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02-14-2013, 05:33 PM	#3
towlie Nissanaholic! Join Date: Jun 2009 Location: Pacific NorthWest Posts: 2,496 Trader Rating: (11) Feedback Score: 11 reviews	Replace the belts, inspect the water pump, properly bleed the coolant system (search), check the rad hoses for cracks/pinholes, check the rad aswell

02-15-2013, 12:15 AM	#4
Ryanswartout Join Date: Jan 2012 Location: Oregon (Newberg) Age: 30 Posts: 36 Trader Rating: (0) Feedback Score: 0 reviews	towlie is prolly right with bleeding the system, jack the front of your car up a little then fill your radiator with water, then open you bleeder valve (its on the water neck going into the head) squeeze your top and bottom hoses a little and fill the radiator until water comes out that little screw. you will have to use a funnel on your radiator bc you will need your water lv into the radiator to be higher than that little bleeder screw.

02-15-2013, 12:23 AM	#5
jdm213 Zilvia Addict Join Date: Sep 2009 Location: los angeles Age: 31 Posts: 957 Trader Rating: (10) Feedback Score: 10 reviews	heres also another possibity ..... maybe ur thermostat is defective sometimes they dont open up ..... remover your water pump and check ifs old and worn out and retire it.... while ur inspecting the water pump its wise to replace ur belts or reuse if its still good and tighten them right do they dont squeel .. impretttty sure ur belt squeeks beacuse of your water pump it looks like its spinning the pump but if you could imagine it inside the blades are not spinning u shud remove it and investigate this further this a very easy fix hope this helps

02-15-2013, 06:03 AM	#6
southfloriida Join Date: Jan 2013 Location: SWFL Age: 28 Posts: 7 Trader Rating: (0) Feedback Score: 0 reviews	I will try bleeding the system today and give an update once I finish. Thanks for the suggestions so far.