s14 overheating issue - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Ikant · 03-16-2009, 05:49 PM

I recently replaced my radiator because it exploded. the car was overheating and im sure the pressure was too much. I replaced the thermostat thinking that might have been the problem, but it wasnt, car kept overheating with new radiator and thermostat. I removed the thermostat and car is still overheating. I am thinking it might be the waterpump, but i was wondering if it could have something to do with the fan. I can drive on the freeway for hours and the guage wont move above "normal", even if the a/c is on. When i drive through town, once it gets warm it overheats when i sit at a light. When i start driving again, temp goes back down. Any ideas? should i replace the water pump? could it be the clutch fan? I bled the system multiple times, im sure it could still be a bleeding issue, but was looking for feedback. I read several other threads but found nothing on the fan issue. thanks.

JRas · 03-16-2009, 07:06 PM

inspect the clutch fan..

godsmack · 03-17-2009, 03:24 PM

def. the fan. get some dual electric fans and problem solved. or just go and get a replacement clutch fan.

*DALAZ_68* · 03-17-2009, 03:28 PM

sounds like a pump issue to me...replace both...its like 60 bucks for both parts and do the labor yourself...learn something

nzmoman · 03-17-2009, 03:34 PM

also make sure you are properly bleeding ALL the air out of the system. You will need to use the bleeder valve.

also if you let your car run with the radiator cap off you will get an idea as to whether or not your pump works. If it does not work after about 5-10 minutes at idle then it probably needs to be replaced.

*DALAZ_68* · 03-17-2009, 04:07 PM

Quote:

Originally Posted by nzmoman

If it does not work after warm up about 5-10 minutes at idle then it probably needs to be replaced.

there you go, fixed it a bit

reaxion · 03-17-2009, 05:38 PM

lift up the front end of your car while running the car w the radiator cap off (trust me) air in the system can cause the exact same symptoms you are describing.

if it IS a water pump issue, youd see coolant coming out the weephole, but you might as well replace it since you did your radiator and thermostat.

fan clutch COULD be bad, itd help though if you knew anyone that had access to a CONSULT then you could see if it was actually kickin on after reaching operating temp

godsmack · 03-17-2009, 09:39 PM

umm come on guys he blead the rad. already it's not the pump since it would heat up all the time not when just sitting there. fans are designed to only have to work when the air needs to get pulled through the radiator. so verdict in = change fan.

WoolyS14DET · 03-17-2009, 09:50 PM

Yes fan clutch is junk !! Replace it and end of story

Ikant · 03-19-2009, 10:26 AM

thanks for the feedback, ill try the fan. if that doesnt work, water pump.

newslidz · 03-19-2009, 03:55 PM

ok I also had similar problem it could sit and idle fine though everything seemed fine till i drove for a while and then it would get hot when i went through traffic. so I replaced the thermostat water pump radiator and still overheating so I was PISSED so then i went throught the system and yanked the heater hoses off the firewall flushed the system everything seemed fine on the engine side then i hooked up the hose to the heater core and nothing so i bypassed it and ive been fine since so check that also i think the winter killed it.

VMP · 03-19-2009, 04:22 PM

Quote:

Originally Posted by newslidz

ok I also had similar problem it could sit and idle fine though everything seemed fine till i drove for a while and then it would get hot when i went through traffic. so I replaced the thermostat water pump radiator and still overheating so I was PISSED so then i went throught the system and yanked the heater hoses off the firewall flushed the system everything seemed fine on the engine side then i hooked up the hose to the heater core and nothing so i bypassed it and ive been fine since so check that also i think the winter killed it.

punctuation plzzzzzz?

03-16-2009, 05:49 PM	#1
Ikant Zilvia Member Join Date: Feb 2007 Location: turlock Age: 58 Posts: 205 Trader Rating: (0) Feedback Score: 0 reviews	s14 overheating issue I recently replaced my radiator because it exploded. the car was overheating and im sure the pressure was too much. I replaced the thermostat thinking that might have been the problem, but it wasnt, car kept overheating with new radiator and thermostat. I removed the thermostat and car is still overheating. I am thinking it might be the waterpump, but i was wondering if it could have something to do with the fan. I can drive on the freeway for hours and the guage wont move above "normal", even if the a/c is on. When i drive through town, once it gets warm it overheats when i sit at a light. When i start driving again, temp goes back down. Any ideas? should i replace the water pump? could it be the clutch fan? I bled the system multiple times, im sure it could still be a bleeding issue, but was looking for feedback. I read several other threads but found nothing on the fan issue. thanks.

03-16-2009, 07:06 PM	#2
JRas Zilvia FREAK! Join Date: Jul 2007 Location: Arizona Age: 36 Posts: 1,503 Trader Rating: (2) Feedback Score: 2 reviews	inspect the clutch fan.. __________________

03-17-2009, 03:28 PM	#4
DALAZ_68 not giving a fuck Join Date: Apr 2007 Location: Los angeles Age: 38 Posts: 15,077 Trader Rating: (104) Feedback Score: 104 reviews	sounds like a pump issue to me...replace both...its like 60 bucks for both parts and do the labor yourself...learn something __________________ LOL 240... whats better than 1? 5 1's ...lol PSN & XBL GT : Wh0pp3r68 CLUB LEXUS : Wh0pp3r

03-17-2009, 03:24 PM	#3
godsmack Zilvia Addict Join Date: Feb 2009 Location: Allentown, PA Age: 39 Posts: 652 Trader Rating: (0) Feedback Score: 0 reviews	def. the fan. get some dual electric fans and problem solved. or just go and get a replacement clutch fan.

03-17-2009, 03:34 PM	#5
nzmoman Zilvia Junkie Join Date: Feb 2008 Location: South Age: 43 Posts: 317 Trader Rating: (2) Feedback Score: 2 reviews	also make sure you are properly bleeding ALL the air out of the system. You will need to use the bleeder valve. also if you let your car run with the radiator cap off you will get an idea as to whether or not your pump works. If it does not work after about 5-10 minutes at idle then it probably needs to be replaced.

03-17-2009, 05:38 PM	#7
reaxion Zilvia Junkie Join Date: Jan 2006 Location: midwest / Chi-city Age: 42 Posts: 376 Trader Rating: (0) Feedback Score: 0 reviews	lift up the front end of your car while running the car w the radiator cap off (trust me) air in the system can cause the exact same symptoms you are describing. if it IS a water pump issue, youd see coolant coming out the weephole, but you might as well replace it since you did your radiator and thermostat. fan clutch COULD be bad, itd help though if you knew anyone that had access to a CONSULT then you could see if it was actually kickin on after reaching operating temp

03-17-2009, 09:39 PM	#8
godsmack Zilvia Addict Join Date: Feb 2009 Location: Allentown, PA Age: 39 Posts: 652 Trader Rating: (0) Feedback Score: 0 reviews	umm come on guys he blead the rad. already it's not the pump since it would heat up all the time not when just sitting there. fans are designed to only have to work when the air needs to get pulled through the radiator. so verdict in = change fan.

03-17-2009, 09:50 PM	#9
WoolyS14DET Zilvia FREAK! Join Date: Mar 2008 Location: Long Island, NY Age: 46 Posts: 1,310 Trader Rating: (18) Feedback Score: 18 reviews	Yes fan clutch is junk !! Replace it and end of story

03-19-2009, 10:26 AM	#10
Ikant Zilvia Member Join Date: Feb 2007 Location: turlock Age: 58 Posts: 205 Trader Rating: (0) Feedback Score: 0 reviews	thanks for the feedback, ill try the fan. if that doesnt work, water pump.

03-19-2009, 03:55 PM	#11
newslidz Zilvia Member Join Date: Feb 2009 Location: ORLANDO FL... Age: 34 Posts: 259 Trader Rating: (3) Feedback Score: 3 reviews	ok I also had similar problem it could sit and idle fine though everything seemed fine till i drove for a while and then it would get hot when i went through traffic. so I replaced the thermostat water pump radiator and still overheating so I was PISSED so then i went throught the system and yanked the heater hoses off the firewall flushed the system everything seemed fine on the engine side then i hooked up the hose to the heater core and nothing so i bypassed it and ive been fine since so check that also i think the winter killed it.