overheathing problem =( - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

napor · 05-18-2011, 10:38 AM

I have done a lot of reseach and done a couple of things to my stock ka24de and still does it.... Everything started when my original radiator blew up... replaced radiator and then after a couple of weeks, my car started to over heat ever sence, it only does it when im driving it, after 10 minutes or so... it never does it when is idling even if i have it runing for a half hour, at first i will not have heat, and as the temp. gauge starts to go up, i get heat, then after 5 minutes or so my temperature gauge starts to come down to normal temp. at first i tough i had a bad thermostat, so i replace it 2 times, my first one was for a autozone one, still did the same things, so i replace it with a nissan one, still the same, i also noticed my lower hose never gets the same temperature as the upper hose, in any situation hot, cold normal running conditions, i bleed the system thinking is a buble in the system, that kinda stop it for a while like 2 or 3 weeks but then started again, i pressure tested it. i don't know what else i can do. please some help would be really apreciated. thanks guys

ska · 05-18-2011, 11:10 AM

check your waterpump

napor · 05-18-2011, 11:13 AM

what you mean? like take it out and check it if the fins are good?....
thanks..

ska · 05-18-2011, 12:28 PM

Quote:

Originally Posted by napor

what you mean? like take it out and check it if the fins are good?....
thanks..

just check for leaks around the pump and any free play on the pulley. dont know if a waterpump can internally be defective but if its old i'd replace it.

murda-c · 05-18-2011, 11:15 AM

when you say 'have heat' are you talking about the heat through the blower inside the car?

make sure that works and there is no bubble in that system.

Might want to check on your headgasket as well.

napor · 05-18-2011, 11:20 AM

Yes that what i ment, like hot air coming out of my vents.... and by what i see it looks like it has been a headgasket replacement before.... i say that cuz of the the type of sylicone all arround the head, valve cover and oil pan. it's red and a lil messy. clearly not from factory.

camaro379ss · 05-18-2011, 12:22 PM

what do you mean silcione around the head? maybe I am not reading this right but do you mean between the head and block?

if it were waterpump related it would be leaking out the weep hole....generally

When you pressure tested what did you find? Do you have white smoke out the exhaust? Are you sure you got all the air out of the system?

Possible clog in the heater core?

curbhuggerrps13 · 05-18-2011, 12:26 PM

i vote water pump and air in the system. might as well replace it since im sure its old and worn by now.

napor · 05-19-2011, 09:03 AM

Quote:

Originally Posted by camaro379ss

what do you mean silcione around the head? maybe I am not reading this right but do you mean between the head and block?

if it were waterpump related it would be leaking out the weep hole....generally

When you pressure tested what did you find? Do you have white smoke out the exhaust? Are you sure you got all the air out of the system?

Possible clog in the heater core?

Yes i ment silicone between the head sorry for not explain it better. No no white/black smoke coming out, and yes i got all the air out tru the bleeder whole.

camaro379ss · 05-18-2011, 12:28 PM

wouldnt hurt to replace it anyways since its sounds like you have replaced everything else

curbhuggerrps13 · 05-18-2011, 12:31 PM

how many miles are on said car?

napor · 05-19-2011, 09:05 AM

and now well im guessing next step is going to be my water pump to check it since i have not done that car has 134k on it, and most likely replace it. Thanks for the help guys...

05-18-2011, 10:38 AM	#1
napor Join Date: Mar 2011 Location: Worcester MA Age: 39 Posts: 5 Trader Rating: (0) Feedback Score: 0 reviews	overheathing problem =( I have done a lot of reseach and done a couple of things to my stock ka24de and still does it.... Everything started when my original radiator blew up... replaced radiator and then after a couple of weeks, my car started to over heat ever sence, it only does it when im driving it, after 10 minutes or so... it never does it when is idling even if i have it runing for a half hour, at first i will not have heat, and as the temp. gauge starts to go up, i get heat, then after 5 minutes or so my temperature gauge starts to come down to normal temp. at first i tough i had a bad thermostat, so i replace it 2 times, my first one was for a autozone one, still did the same things, so i replace it with a nissan one, still the same, i also noticed my lower hose never gets the same temperature as the upper hose, in any situation hot, cold normal running conditions, i bleed the system thinking is a buble in the system, that kinda stop it for a while like 2 or 3 weeks but then started again, i pressure tested it. i don't know what else i can do. please some help would be really apreciated. thanks guys

05-18-2011, 11:15 AM	#5
murda-c Post Whore! Join Date: Jan 2007 Location: Montgomery County, MD Age: 36 Posts: 3,198 Trader Rating: (1) Feedback Score: 1 reviews	when you say 'have heat' are you talking about the heat through the blower inside the car? make sure that works and there is no bubble in that system. Might want to check on your headgasket as well. __________________

05-18-2011, 12:22 PM	#7
camaro379ss Zilvia Junkie Join Date: Mar 2011 Location: Indianapolis, IN Posts: 363 Trader Rating: (4) Feedback Score: 4 reviews	what do you mean silcione around the head? maybe I am not reading this right but do you mean between the head and block? if it were waterpump related it would be leaking out the weep hole....generally When you pressure tested what did you find? Do you have white smoke out the exhaust? Are you sure you got all the air out of the system? Possible clog in the heater core? __________________ 1991 Nissan B13 Sentra sr20det 300whp/1991 Nissan S13 240sx sr20det ~260whp

05-18-2011, 12:28 PM	#10
camaro379ss Zilvia Junkie Join Date: Mar 2011 Location: Indianapolis, IN Posts: 363 Trader Rating: (4) Feedback Score: 4 reviews	wouldnt hurt to replace it anyways since its sounds like you have replaced everything else __________________ 1991 Nissan B13 Sentra sr20det 300whp/1991 Nissan S13 240sx sr20det ~260whp

05-18-2011, 11:10 AM	#2
ska Leaky Injector Join Date: Oct 2010 Location: Sacramento, CA Posts: 146 Trader Rating: (1) Feedback Score: 1 reviews	check your waterpump

05-18-2011, 11:13 AM	#3
napor Join Date: Mar 2011 Location: Worcester MA Age: 39 Posts: 5 Trader Rating: (0) Feedback Score: 0 reviews	what you mean? like take it out and check it if the fins are good?.... thanks..

05-18-2011, 11:20 AM	#6
napor Join Date: Mar 2011 Location: Worcester MA Age: 39 Posts: 5 Trader Rating: (0) Feedback Score: 0 reviews	Yes that what i ment, like hot air coming out of my vents.... and by what i see it looks like it has been a headgasket replacement before.... i say that cuz of the the type of sylicone all arround the head, valve cover and oil pan. it's red and a lil messy. clearly not from factory.

05-18-2011, 12:26 PM	#8
curbhuggerrps13 Zilvia Addict Join Date: Apr 2003 Location: fort drum Posts: 798 Trader Rating: (1) Feedback Score: 1 reviews	i vote water pump and air in the system. might as well replace it since im sure its old and worn by now.

05-18-2011, 12:31 PM	#11
curbhuggerrps13 Zilvia Addict Join Date: Apr 2003 Location: fort drum Posts: 798 Trader Rating: (1) Feedback Score: 1 reviews	how many miles are on said car?

05-19-2011, 09:05 AM	#12
napor Join Date: Mar 2011 Location: Worcester MA Age: 39 Posts: 5 Trader Rating: (0) Feedback Score: 0 reviews	and now well im guessing next step is going to be my water pump to check it since i have not done that car has 134k on it, and most likely replace it. Thanks for the help guys...