You may have blown the head gasket again. Do a compression test on all cylinders. Are you losing coolant on a regular basis; if so, then there's a good chance of a blown gasket.

 

the oil isnt milky at all, but damn i hope its not blown again, ill be pissed, but ill do a comp test tomorrow hopefully

 

its probably air in your cooling system


you need to get the front up on ramps

take off radiator cap

have coolent/water mixture ready


turn it on then let it warm up(to open thermastat)


squeeze all accesable hoses let it overflow and it will bubble keep doing this untill bubbles are gone keep adding coolent mixture to keep the level high

my friend and i did this and it solved our problems

 

i did a compression test and i got 170, 180, 165, 165, so im good on that, my step dad thinks its the water pump and so does my friend, so im gonna try that first, as soon as i get enough money

 

try refill/bleed ur cooling system. and make sure ur fan is turning on too.

 

try refill/bleed ur cooling system. and make sure ur fan is turning on too.

when you refill do what i told you it will work check if there are n e leaks as well

 

did you check what code popped out?

 

no...how do i do that

 

Instead of me explaining it to you, go to http://www.240sx.org/faq/index.html and look up 'ECM reading trouble codes DOHC'.

 

i just put a new water pump on, a new water temp sensor, and a new water temp switch, and it still over heats, i guess tomorrow, im gonna go buy a new thremostat, and some seafoam, and see if that fixes it, any ideas on what else it could be?

 

i just put a new water pump on, a new water temp sensor, and a new water temp switch, and it still over heats, i guess tomorrow, im gonna go buy a new thremostat, and some seafoam, and see if that fixes it, any ideas on what else it could be?

i already did, but yeah i bought a new thermo and some radiator flush shit, so ill do that tonight

 

have u tried reading the code or what johnny posted?

 

i havnt read the code yet, but i did sqeeze the hoses to get the air out, and that didnt help

 

to properly bleed the system u need to run the car(with coolant in of course) with the heater on(ac off) full blast. wait til it reaches operating temp. keep refilling as necesary, all air bubbles should come shooting out. takes about 20 min. THERE IS a chance that air is getting trapped between the coolant and thermostat causing it not to open, which would make ur car overheat. signs of this is the thermostat not opening and the coolant will boil out of ur radiator filler while ur doing this.

 

try changing the coolant temp sensor?>

 

how did the flush go

i think your intake manifold should have a water jacket bleeder ... its just a 10mm bolt on the manifold and lets air out of the highest point of the cooling system.

also check for belt tension and make sure your tensioner bolt isnt sliding when youre driving.

those were the things i had to look at when i was having cooling problems... did those things and flushed and my car hasnt gone over half since...

 

go to a shop that will change coolent with this machine that makes sure no bubbles are in it when i took out my thermo there was this gross brain lookin shit in it after i cleaned that and replaced and changed water pump and coolent i was fine

 

im about to take it to a shop after after i flush the radiator, which im doing tomorrow, and i put the new thermo in, so tomorrow night ill have a update, and thanks for the replys guys

 

what temp is the thermostat supposed to be, the one i just took out said 195F and the one i just put in is 170F, do you think that was the problem the whole time?

 

ok i flushed it, and put a new thremo in, and i guess the gasket is bad because it leaked bad when i tried to drive it around, and its really cold, so ill fix that tomorrow, this is what i cleaned outta my radiator today

and this is this morning

my car stuck in my yard, damn rain

 

nooooooooooooooooooooo!!!!!! The mortal enemies of rwd mud and grass!

 

that bitch was sunk in there, i shoulda took pics of the huge ruts in the yard before we covered them up

 

okay...i fixed it so its not leaking now, but it still overheats, i have no idea what it could be, i bled the system perfectly, ive changed everything possible i think. i dont know what to do, and ive noticed when it starts to overheat, it only does that when i have it in gear and am giving it gas, if i pop it into neutral and coast the gauge will stop going up and either stop there, or go back down

 

sounds like it could be a wiring issue. Is it actually overheating or are you only going by the gauge in the car? I know you said you replaced the temp sensor and all, but i would double check all of the wires and make sure none are shorting out or have come loose, because if it is perfectly bled you should have no problems whatsoever and you have a 170 thermostat so you are plenty good to stay cool, im starting to beleive you may have a wiring issue so check all of the wiring that goes to the coolant temp sensor, that is the only reason your car died when you pushed in the clutch in the first place is because it was not reading correctly and told the ecu to give the wrong parameters and either starved it of fuel or gave it too much, plus your check engine light came on so double check those connections just to be safe!

 

I would also look into a an aftermarket temperature gauge with a sensor, to know exactly how hot its running, the stock guage simply reads, cold, warm over heating as i was told.

 

Ok so everyone is going after everything in the cooling systme except the fan. What are you runnng? stock or electric? Does the temp come back down as your cruising at highway speeds then creep up as soon as you stop? If your running a stock fan, it looks like the fan clutch is gone. go to a junkyard and get a new fan clutch, you could transfer your actual fan to the new fan clutch. make sure your runnin a shroud! If its an electric fan, make sure it has a shroud, and make sure its switches on when its supposed to

 

i have a stock fan, and when it starts to overheat, after about 10 min of driving, if i put it in neutral, it stops, then if i put it in gear and accelerate it starts to go back up, thats whats been happening now, and i was thinking about getting a temp gauge and hooking that up to see if it actually is overheating, thats the first thing i thot when i read orange silvia's post, but ill go get a fan clutch, can i use one off a sohc?

 

Was the new thermostat a Nissan OEM; if you installed some aftermarket unit like a Stant, then that could be your overheating problem.