KA Overheating, fluid leak out vent tube??? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

nissantuner22 · 02-22-2005, 02:01 PM

Wierd! My KA keeps overheating from lack of coolant. My radiator is fine, its brand new, no leaks. However, once my car gets hot enough, fluid shoots out the firewall, out a vent tube. Also, somewhere underneath my Intake runners, there is a HUGE leak. what hoses are under the intake manifold that can leak like that? could it be my thermostat isnt opening, and making my car overheat, causing the fluid out of the firewall vent tube?

If its at all prudent, The heat sucks on my car, even when it overheats it takes forever for the air to warm up. plus, my fluid is brown looking. not good.

help!

Flybert · 02-22-2005, 02:40 PM

That isn't a vent tube. That's where a heater hose is supposed to be hooked up and it hooks onto a pipe on the back of your intake mani. How long have you been driving it like this?

nissantuner22 · 02-22-2005, 02:47 PM

WHAT?! I dont think so... I'll go take a look at that.

I've driven it over 10,000 miles like that.

nissantuner22 · 02-22-2005, 02:59 PM

uh apparantly your thinking about the heater hoses. Im talking about the vent like hose thats on the bottom. its the one pointing down near the bottom of the firewall.

***S14DB*** · 02-22-2005, 03:52 PM

Quote:

Originally Posted by nissantuner22

uh apparantly your thinking about the heater hoses. Im talking about the vent like hose thats on the bottom. its the one pointing down near the bottom of the firewall.

That's your evaporator core drain for your AC system. When the hot moist air hits the cold core it forms water and drains out the tube.

Your heater core is in the same box as the evaporator. When it cracks, it drains out the same hole. Smell a sweet smell out of the air ducts? I bet your heater core in shot.

nissantuner22 · 02-22-2005, 06:25 PM

AGH! would that explain the lack of hot heat, and dirty colored coolant?

***S14DB*** · 02-22-2005, 06:27 PM

nissantuner22 · 02-22-2005, 06:36 PM

yep thats it. i guess my heater core is shot right? damn. And to make matters worse, i have a hose leaking somewhere in that intake manifold area. DAMNIT!

***S14DB*** · 02-22-2005, 07:33 PM

Near the TB?

Replacing the Heater core is phun!!!

nissantuner22 · 02-22-2005, 08:04 PM

kinda in the middle of runners for 2 and 3. I'm just gonna rip off the intake tommorrow and put all new hoses on. no sense in not doing them all when i have the damn intake off.

02-22-2005, 02:01 PM	#1
nissantuner22 Zilvia FREAK! Join Date: Mar 2004 Location: Gainesville, Fl Age: 40 Posts: 1,056 Trader Rating: (-1) Feedback Score: -1 reviews	KA Overheating, fluid leak out vent tube??? Wierd! My KA keeps overheating from lack of coolant. My radiator is fine, its brand new, no leaks. However, once my car gets hot enough, fluid shoots out the firewall, out a vent tube. Also, somewhere underneath my Intake runners, there is a HUGE leak. what hoses are under the intake manifold that can leak like that? could it be my thermostat isnt opening, and making my car overheat, causing the fluid out of the firewall vent tube? If its at all prudent, The heat sucks on my car, even when it overheats it takes forever for the air to warm up. plus, my fluid is brown looking. not good. help! __________________ Current Project: Operation: N/A SR: 93 Silvia Q SR20DE Engine with go fast goodies. , "Common problems 240sx's suffer from are curbs, trees, ditches, and other immovable objects."thx247 "on the tounge... there is no guardrails."- citizen

02-22-2005, 02:47 PM	#3
nissantuner22 Zilvia FREAK! Join Date: Mar 2004 Location: Gainesville, Fl Age: 40 Posts: 1,056 Trader Rating: (-1) Feedback Score: -1 reviews	WHAT?! I dont think so... I'll go take a look at that. I've driven it over 10,000 miles like that. __________________ Current Project: Operation: N/A SR: 93 Silvia Q SR20DE Engine with go fast goodies. , "Common problems 240sx's suffer from are curbs, trees, ditches, and other immovable objects."thx247 "on the tounge... there is no guardrails."- citizen

02-22-2005, 02:59 PM	#4
nissantuner22 Zilvia FREAK! Join Date: Mar 2004 Location: Gainesville, Fl Age: 40 Posts: 1,056 Trader Rating: (-1) Feedback Score: -1 reviews	uh apparantly your thinking about the heater hoses. Im talking about the vent like hose thats on the bottom. its the one pointing down near the bottom of the firewall. __________________ Current Project: Operation: N/A SR: 93 Silvia Q SR20DE Engine with go fast goodies. , "Common problems 240sx's suffer from are curbs, trees, ditches, and other immovable objects."thx247 "on the tounge... there is no guardrails."- citizen

02-22-2005, 06:25 PM	#6
nissantuner22 Zilvia FREAK! Join Date: Mar 2004 Location: Gainesville, Fl Age: 40 Posts: 1,056 Trader Rating: (-1) Feedback Score: -1 reviews	AGH! would that explain the lack of hot heat, and dirty colored coolant? __________________ Current Project: Operation: N/A SR: 93 Silvia Q SR20DE Engine with go fast goodies. , "Common problems 240sx's suffer from are curbs, trees, ditches, and other immovable objects."thx247 "on the tounge... there is no guardrails."- citizen

02-22-2005, 06:36 PM	#8
nissantuner22 Zilvia FREAK! Join Date: Mar 2004 Location: Gainesville, Fl Age: 40 Posts: 1,056 Trader Rating: (-1) Feedback Score: -1 reviews	yep thats it. i guess my heater core is shot right? damn. And to make matters worse, i have a hose leaking somewhere in that intake manifold area. DAMNIT! __________________ Current Project: Operation: N/A SR: 93 Silvia Q SR20DE Engine with go fast goodies. , "Common problems 240sx's suffer from are curbs, trees, ditches, and other immovable objects."thx247 "on the tounge... there is no guardrails."- citizen

02-22-2005, 02:40 PM	#2
Flybert Post Whore! Join Date: Mar 2003 Location: none Posts: 3,862 Trader Rating: (7) Feedback Score: 7 reviews	That isn't a vent tube. That's where a heater hose is supposed to be hooked up and it hooks onto a pipe on the back of your intake mani. How long have you been driving it like this?

02-22-2005, 06:27 PM	#7
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews

02-22-2005, 07:33 PM	#9
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	Near the TB? Replacing the Heater core is phun!!!

02-22-2005, 08:04 PM	#10
nissantuner22 Zilvia FREAK! Join Date: Mar 2004 Location: Gainesville, Fl Age: 40 Posts: 1,056 Trader Rating: (-1) Feedback Score: -1 reviews	kinda in the middle of runners for 2 and 3. I'm just gonna rip off the intake tommorrow and put all new hoses on. no sense in not doing them all when i have the damn intake off. __________________ Current Project: Operation: N/A SR: 93 Silvia Q SR20DE Engine with go fast goodies. , "Common problems 240sx's suffer from are curbs, trees, ditches, and other immovable objects."thx247 "on the tounge... there is no guardrails."- citizen