S13 with Rb20det overheating on long drives - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

AONEplus · 05-20-2020, 06:01 PM

Hi, this is my first post here, hope its in the correct section.
I have searched the forum and didnt find an answer to my issue, hope you guys can help.

I have recently imported an s13 with an rb20 to Israel, and since its first day here the water temp gauge needle sat comfortably between the center mark and the one above it. It didnt have a thermostat at all. I went on doing the timing belt, tensioners, water pump and fuel and oil filters, plus added a motorad thermo. Still, the gauge showed the same. Changed the gauge sensor and flushed the water system twice, no change. Went on changing the small electric fans the car came with to two bigger ones that are always on. Now the needle dropped to the center mark when in traffic and even drops under from time to time, but as soon as im on an open road it goes up again, doesnt matter how hard i drive it. As soon as im in traffic again it drops back to the center mark.
Cannot figure out what is causing it.
Any ideas?

Thanks in advance

jedi03 · 05-21-2020, 07:52 AM

your fans being on all the time blocks air flow at higher speeds...get a fan controller to turn them on and off for you...i personally like the DCC (delta current control) fan controller...little pricier but less to worry about...

AONEplus · 05-21-2020, 04:07 PM

Good idea, ill try it out tomorrow

05-20-2020, 06:01 PM	#1
AONEplus Join Date: Dec 2018 Location: Israel Age: 37 Posts: 2 Trader Rating: (0) Feedback Score: 0 reviews	S13 with Rb20det overheating on long drives Hi, this is my first post here, hope its in the correct section. I have searched the forum and didnt find an answer to my issue, hope you guys can help. I have recently imported an s13 with an rb20 to Israel, and since its first day here the water temp gauge needle sat comfortably between the center mark and the one above it. It didnt have a thermostat at all. I went on doing the timing belt, tensioners, water pump and fuel and oil filters, plus added a motorad thermo. Still, the gauge showed the same. Changed the gauge sensor and flushed the water system twice, no change. Went on changing the small electric fans the car came with to two bigger ones that are always on. Now the needle dropped to the center mark when in traffic and even drops under from time to time, but as soon as im on an open road it goes up again, doesnt matter how hard i drive it. As soon as im in traffic again it drops back to the center mark. Cannot figure out what is causing it. Any ideas? Thanks in advance Last edited by AONEplus; 05-20-2020 at 06:04 PM.. Reason: Added information

05-21-2020, 07:52 AM	#2
jedi03 Nissanaholic! Join Date: Jul 2008 Location: albuquerque Posts: 1,836 Trader Rating: (8) Feedback Score: 8 reviews	your fans being on all the time blocks air flow at higher speeds...get a fan controller to turn them on and off for you...i personally like the DCC (delta current control) fan controller...little pricier but less to worry about...

05-21-2020, 04:07 PM	#3
AONEplus Join Date: Dec 2018 Location: Israel Age: 37 Posts: 2 Trader Rating: (0) Feedback Score: 0 reviews	Good idea, ill try it out tomorrow