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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars |
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#1 | ||
Zilvia FREAK!
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#2 |
Philosopher King
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You need to get very in depth with this problem. I am in the process of changing my hg because of over heating. It lasted about nine months with it blown hg(no oil and water mixing) but it let go all of a sudden last week.
I guess I'm saying watch out, it'll go from ok to a one ton paper wait real quick.
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#3 | |
Nissanaholic!
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#5 |
BANNED
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Its all good s13boy. Just follow the protocal for it man. Grab that new water pump when ever you can and dont forget to flush that radiator like a mother. I usually just grab the hoes and have the water force down any deposits that might be stuck at the bottom of the rad. It might have been something as little as some sludge since you said the bottom of your radiator was still cooler that the top. After this youll even notice a little drop on the temp needle while ur driving
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#7 |
Philosopher King
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My head gasket was blown in an area that allowed combustion gases in to the cooling system but not oil. That is bad for the water jackets as it promotes oxidation.
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#8 |
Nissanaholic!
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well i was driving it earlier and no problems, i even drove the shit out of it and had stable temperture, but then i drove it again and it started reading HOT after only 10 minutes and it was COLD outside. i tried bleeding through the lil screw hole only, but it just keeps bubbling out. i did this for like 15 minutes.
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#10 |
Zilvia Junkie
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Hmm this is starting to sound like my problem...But I think I ruled it out as Headgasket for me since the thermo and waterpump are brand new as well as flushed the system. But I overheat when the car is level but not when the front end is jacked up. I bled the system of air 5-6 times.
And when I first start the car up the smoke is real white but it dies down...but then it comes back some times when idling.... It's f'n cold up here too. Northwest Ohio....Thank god I am moving back to Florida by the time it is next winter.... |
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#12 |
Nissanaholic!
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yeha i have no smoke, and just changed the thermo and keep bleeding it but there is and endless supply of bubble coming out of the bleeder do i have to wait forever
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#14 |
Zilvia Addict
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Check your headgasket by doing a compression test....
http://www.nicoclub.com/articles.php?id=159838 If your head gasket checks out okay, then chances are your radiator is clogged with calcium deposits. You'll have to have it chemically cleaned at a radiator shop or you can go & buy a new one. It's cheaper to have it chemically cleaned but you just need to make sure the radiator shop does a good job putting it back together after they cleaned it. Anyhow, here's a link to how your cooling system works.... http://auto.howstuffworks.com/cooling-system.htm Hope this helps.. ID
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#18 |
Philosopher King
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It should only take 3 to 5 mins to bleed the system. If it keeps bubbling that is combustion gases going into the cooling system rather than the exhaust.
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#21 |
Zilvia FREAK!
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Yes.
It'll take me no more than 5 mins to bleed the system. If you had your heater on, and continuous bubbling, its your head gasket No if you keep bleeding it wont go away. Just accept the fact and repair it.
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#23 |
Zilvia Member
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B/F you install a new thermostat your suppose to pre-heat and make sure it opens up all the way. Sometimes with a new thermo they will not open on the first attempt.
Also to check for a blown head gasket use a block tester you can pickup at your local part store. It checks for Gases in your coolant.
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#24 |
Nissanaholic!
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well i let it bleed more and it stopped bubbling and it was just coolant coming out of the bleeder hole, so i drove it pretty hard for a good 15 minutes and the temp stayed a lil under half the whole time. im going to let it cool off and drive it again and see if it overheats
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#25 | |
Zilvia Addict
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i dont give a shit about these neg-repping assholes, when my car was overheating, it was a stupid radiator cap, they wear out, and the lossed pressure in your radiator causes it to overheat.... its h.s. chem class shit. pressure/boiling points..
its a $10 piece to replace that wear item (fsm had an estimated milage of how long they last, i want to say 75,000) that cap with a flush fixed it for me, way cheaper than replacing all that other crap. might be something worth trying
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#27 |
Zilvia FREAK!
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juss crack the bleeder screw and then keep pouring coolent in.
thas how i pour my water in. and let it run and idle for a bit and check back. when it does get hot and while its running and cap it on. do you hear bubble'ing from anywhere? like; resvoir. inside radiator.? if so you might have a bad headgasket from running to hot. and or you cap kould b weak now.
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#28 |
Nissanaholic!
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well yesterday i bleed it and bubbles stopped coming out of the bleeder valve, and i tried another cap i had laying around, drove it 3 times a good 15 min each and temp was stable the whole time. maybe the new failsafe thermo was just sticky
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