rb20 bubble'n over - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

tougejunkie · 05-02-2008, 08:16 PM

so everyone and their momma knows that rb's are very notorious for overheating but i have a weird situation. i own a rb20 blah blah and even though i flushed, put in new coolant and bled the cooling system my coolant gets really hot and bubbles out of the overflow tank.. but my car doesnt over heat at all, and i am positivie that my car isnt overheating... so i have no idea what is going on.. i might think its that the radiator cap isnt holding pressure or i just need to run two e fans, but again im not overheating... sigh so if anyone has had this problem please let me know what u did.. thanks alot for readn

georgesal · 05-02-2008, 08:22 PM

change the cap, sounds like its not holding the pressure like you had said

Tenchuu · 05-02-2008, 08:45 PM

get a lazer heat sensor and investigate further. you need one, trust me.

Z U L8R · 05-02-2008, 11:27 PM

for the sake of not condemning the headgasket, i suggest 2 things. 1 go to the parts store (Advanced Auto usually has it in stock) and get the coolant temp SENDING UNIT (it has one male spade connector sticking out of the top) it is NOT the two terminal coolant temperature sensor for the ecu, you want the one for the guage, it's like 16 bucks. get the one for the year make and model of your car. if your 240's an s13 then get an s13 one, if yours is an s14 then get an s14 one. all you need to change it is a deep 13mm socket and a rachet. after you've done that, it would be a good idea to do a compression test.

please repost after you've done that. gl

Dave @ Lethal Injection Motorsports www.lethalmotorsports.com

tougejunkie · 05-03-2008, 05:03 PM

lol it was the radiator cap..

its all fine now thanks though guys

05-02-2008, 08:16 PM	#1
tougejunkie Users Awaiting Email Confirmation Join Date: Nov 2006 Location: Rocklin/Citrus Heights SAC Age: 34 Posts: 43 Trader Rating: (0) Feedback Score: 0 reviews	rb20 bubble'n over so everyone and their momma knows that rb's are very notorious for overheating but i have a weird situation. i own a rb20 blah blah and even though i flushed, put in new coolant and bled the cooling system my coolant gets really hot and bubbles out of the overflow tank.. but my car doesnt over heat at all, and i am positivie that my car isnt overheating... so i have no idea what is going on.. i might think its that the radiator cap isnt holding pressure or i just need to run two e fans, but again im not overheating... sigh so if anyone has had this problem please let me know what u did.. thanks alot for readn

05-02-2008, 11:27 PM	#4
Z U L8R Zilvia FREAK! Join Date: Jan 2007 Location: Georgia Age: 39 Posts: 1,194 Trader Rating: (0) Feedback Score: 0 reviews	for the sake of not condemning the headgasket, i suggest 2 things. 1 go to the parts store (Advanced Auto usually has it in stock) and get the coolant temp SENDING UNIT (it has one male spade connector sticking out of the top) it is NOT the two terminal coolant temperature sensor for the ecu, you want the one for the guage, it's like 16 bucks. get the one for the year make and model of your car. if your 240's an s13 then get an s13 one, if yours is an s14 then get an s14 one. all you need to change it is a deep 13mm socket and a rachet. after you've done that, it would be a good idea to do a compression test. please repost after you've done that. gl Dave @ Lethal Injection Motorsports www.lethalmotorsports.com __________________ RB25 280z GT30/76R 441hp/381tq [email protected]

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05-02-2008, 08:22 PM	#2
georgesal BANNED Join Date: Oct 2006 Location: Los Angeles Age: 36 Posts: 842 Trader Rating: (2) Feedback Score: 2 reviews	change the cap, sounds like its not holding the pressure like you had said

05-02-2008, 08:45 PM	#3
Tenchuu Post Whore! Join Date: Apr 2004 Location: Oregon Age: 39 Posts: 2,474 Trader Rating: (8) Rides Gallery: Tenchuu Feedback Score: 8 reviews	get a lazer heat sensor and investigate further. you need one, trust me.

05-03-2008, 05:03 PM	#5
tougejunkie Users Awaiting Email Confirmation Join Date: Nov 2006 Location: Rocklin/Citrus Heights SAC Age: 34 Posts: 43 Trader Rating: (0) Feedback Score: 0 reviews	lol it was the radiator cap.. its all fine now thanks though guys