hello all, i was driving and my car jerked and check engine appeared.. followed by white smoke and noticed my needle was on h. pulled over and my coolant was spewing out of the top release valve. resevoir is fine and hose. fans working and no leaking. car heats up regardless if parked or air on. any ideas?? the coolant raises in the little area so is the water pump working??? could it be thermostat or radiator?? please helpppppp.. thanks

 

My 2006 g35 overheated last week. Replaced thermostat and works fine now. I had previously noticed that the fans would run on high after a few minutes of driving and now that the thermostat has been replaced, they are much quieter.

 

hopefully that is all. what did that cost? is easy to do it yourself?? i too have noticed the days prior fans were on what seemed like overdrive. lol

 

Well I had taken it in for general maintenance at the dealers and after it was done, they test drove it and it overheated on them. It had never overheated on me before. I guess that since it overheated on them, they didn't charge me. Not sure what the cost would have been.

 

Great. I bought a new thermostat, installed it myself and added some coolant to the reservoir and radiator neck and seems to be running just fine. Thanks for your replies and I will post again if anything changes.

 

Cookies, it is your radiator!

 

How many miles you have on the car?

 

Same thing seemed to happen to me just yesterday. Car has been fine. All of a suddent my wife said, "what's that smell, smells like coolant". Looked down, temp pegged, service light was on and steam and cooland was coming out of the passenger side of the hood just above the headlight. Have not had time to get it in yet to have someone check it. tow truck guy thought it looked as if there was something missing from the top of the resevoir where there is a small square valve type opening. That's where coolant seemed to come from. Radiator levels we a tiny bit low, but I could see coolant still in it.

 

hopefully your head gaskets are fine... if it was on H and throwing out coolant with smoke... im sure you got internal damage hope all goes well and its nothing serious.

 

The coolant came from the resevoir. Would that be a head gasket problem?

 

what i have read.. if your car overheats, chance of your gasket warping... if its the case.. u need to get them resurfaced and resealed... its what happened to my 03 sentra SE-R

 

You guys that overheated, once you get the temp back into order run a UOA to see if coolant seeping into the oil.

 

I had the same issue. A few weeks ago, I was overheating and that was due to the radiator fans not working. The dealer replaced those with the warranty they have on them. That was 3 weeks ago. Now, the same exact thing that happened to Cookies happened to me. Needle on H, then it jerked and check engine light on. I hope it's an easy thermostat fix because even after they replaced my fans, the gauge still jumped a little and was close to H but never corsets the line. Could it be a faulty thermostat?

 

T-stat, fans and radiator cap should always be the first things checked-easiest and cheapest options.

We have aluminum blocks. They had advantages but one of the disadvantages is the ability to warp quicker than aluminum blocks. Do not keep driving if your temp gauge is pasts 3/4. The last 3 notches before the top are dangerous - about 260*+ and it will not take too long to warp the heads.

Other possible causes: head gasket, bad water pump, leaking or clogged radiator.

 

My temp would rise and fall periodically. But on Saturday, I think it had enough. I guess I didnt notice in time and as soon as I looked, the needle was at H then I heard something, it jerked, and the check engine light came on. If the fans were working, it could either be the radiator or the t-stat?