S13 Overheating Diagnosis Help - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Cesar240 · 11-16-2015, 09:23 PM

So I Recently replaced the radiator, the upper and lower hoses, and a couple other Hoses and every time I would install the thermostat the car would over heat. So without the thermostat it wouldn't overheat so I ran it a few weeks without it and it was running perfectly fine and now it's overheating again. What else could it possibly be? I also heard a high pitch whistle noise coming out from under the intake manifold. Any suggestions on what to look for? Thanks!

cotbu · 11-19-2015, 01:55 PM

Leak, blown gasket or just not sufficient cooling of the coolant, because no thermostat

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grinevb · 11-25-2015, 04:16 PM

have the same problem and I took out the t-stat aswell except It never overheated on me without it? Mine only overheats with it in and still can't figure it out.

kruked · 11-25-2015, 10:08 PM

You both still have air in the system.

Atill93 · 11-26-2015, 10:26 PM

yeah make sure you bleed all the air out of the cooling system. you can also do a pressure test and check your compression to see if you have a blown head gasket. you're experiencing the same symptoms i had when i finally discovered my head gasket was blown :/

sincity_sil80 · 12-09-2015, 03:14 AM

Mine is doing the same thing, but ive bled the system 4 times already. Have new POS radiator, new water pump, new hoses, and new thermostat, and its still running hot, after i bled the system today it ran cooler for longer but after a little while the temps start to rise again, any possibility air is somehow getting in or did i just not get it all out?
Btw, i have no coolant overflow tank, just a line routed under the passenger headlight temporarily.

kruked · 12-09-2015, 07:50 AM

Quote:

Originally Posted by sincity_sil80

Btw, i have no coolant overflow tank, just a line routed under the passenger headlight temporarily.

Welp......

boosted23 · 12-09-2015, 07:52 AM

Are yall using cheap waterpumps? Aftermarket cheap waterpumps have usually the wrong sized blades, they are usually shorter and fatter. Causes cooling issues

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11-16-2015, 09:23 PM	#1
Cesar240 Join Date: Aug 2015 Location: La Habra, CA. Age: 26 Posts: 15 Trader Rating: (0) Feedback Score: 0 reviews	S13 Overheating Diagnosis Help So I Recently replaced the radiator, the upper and lower hoses, and a couple other Hoses and every time I would install the thermostat the car would over heat. So without the thermostat it wouldn't overheat so I ran it a few weeks without it and it was running perfectly fine and now it's overheating again. What else could it possibly be? I also heard a high pitch whistle noise coming out from under the intake manifold. Any suggestions on what to look for? Thanks!

11-19-2015, 01:55 PM	#2
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 47 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	Leak, blown gasket or just not sufficient cooling of the coolant, because no thermostat Sent from my SM-N910T3 using Tapatalk __________________ LoverTechnologies "Half Broken Things!"

11-25-2015, 10:08 PM	#4
kruked Nissanaholic! Join Date: Feb 2012 Location: someone's sisters' pants Posts: 2,288 Trader Rating: (37) Feedback Score: 37 reviews	You both still have air in the system. __________________ I like my bikes how I like my b¡tches...naked! 2014 Triumph Street Triple

12-09-2015, 03:14 AM	#6
sincity_sil80 Zilvia Junkie Join Date: Jan 2009 Location: las vegas Age: 31 Posts: 440 Trader Rating: (1) Feedback Score: 1 reviews	Mine is doing the same thing, but ive bled the system 4 times already. Have new POS radiator, new water pump, new hoses, and new thermostat, and its still running hot, after i bled the system today it ran cooler for longer but after a little while the temps start to rise again, any possibility air is somehow getting in or did i just not get it all out? Btw, i have no coolant overflow tank, just a line routed under the passenger headlight temporarily. __________________ 20 till 3:00 = ღ

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11-25-2015, 04:16 PM	#3
grinevb Join Date: Nov 2015 Location: Newmanstown Age: 23 Posts: 16 Trader Rating: (0) Feedback Score: 0 reviews	have the same problem and I took out the t-stat aswell except It never overheated on me without it? Mine only overheats with it in and still can't figure it out.

11-26-2015, 10:26 PM	#5
Atill93 Leaky Injector Join Date: Jul 2012 Location: Alabama Age: 28 Posts: 144 Trader Rating: (0) Feedback Score: 0 reviews	yeah make sure you bleed all the air out of the cooling system. you can also do a pressure test and check your compression to see if you have a blown head gasket. you're experiencing the same symptoms i had when i finally discovered my head gasket was blown :/

12-09-2015, 07:52 AM	#8
boosted23 Leaky Injector Join Date: Nov 2014 Posts: 128 Trader Rating: (2) Feedback Score: 2 reviews	Are yall using cheap waterpumps? Aftermarket cheap waterpumps have usually the wrong sized blades, they are usually shorter and fatter. Causes cooling issues Sent from my SM-G900V using Tapatalk