V-Mount Overheating Issues. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Dustxking · 06-17-2012, 04:23 PM

S13sr20det with v-mount.
Issue is as stated, car runs perfect when just doing regular freeway pulls or street driving. Over the weekend we had a two day event and during both days my car would run great and tons of power no power loss, but after a run or two the water temps would start creeping up to around 115+ and drop after about a min of cool down. So i figured it can be a few things, sticky thermo, bad water pump, bubbles, or maybe a bad HG. Also when the car would start to get hot the resivore would fill up then start spewing out and boiling and start evaporating.

So got her home changed the oil, perfectly goldish brown no chocolate milk. Flushed the radiator for a 6th time, got all the bubbles out. Opened up the thermo and threw it into a boiling pot of water and it has done its job opened fully and closed fully. It is factory thermo BTW. So only other thing i could think of is if the water pump is going bad? I replaced it four years ago when i got my motor, but when redoing everything my motor sat for almost a year and a half whith out being started or any fluids in it, could that cause a water pump to go bad?

I also have not done a leak down or compression test because i dont have either tools.
I have heard of guys having warped heads or slightly bad head gaskets. What would you guys say could be the issue?

06-17-2012, 04:23 PM	#1
Dustxking Zilvia Addict Join Date: Nov 2007 Location: 360 Age: 36 Posts: 709 Trader Rating: (4) Feedback Score: 4 reviews	V-Mount Overheating Issues. S13sr20det with v-mount. Issue is as stated, car runs perfect when just doing regular freeway pulls or street driving. Over the weekend we had a two day event and during both days my car would run great and tons of power no power loss, but after a run or two the water temps would start creeping up to around 115+ and drop after about a min of cool down. So i figured it can be a few things, sticky thermo, bad water pump, bubbles, or maybe a bad HG. Also when the car would start to get hot the resivore would fill up then start spewing out and boiling and start evaporating. So got her home changed the oil, perfectly goldish brown no chocolate milk. Flushed the radiator for a 6th time, got all the bubbles out. Opened up the thermo and threw it into a boiling pot of water and it has done its job opened fully and closed fully. It is factory thermo BTW. So only other thing i could think of is if the water pump is going bad? I replaced it four years ago when i got my motor, but when redoing everything my motor sat for almost a year and a half whith out being started or any fluids in it, could that cause a water pump to go bad? I also have not done a leak down or compression test because i dont have either tools. I have heard of guys having warped heads or slightly bad head gaskets. What would you guys say could be the issue?