Antifreeze leak!! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

RedlineRacer · 09-02-2006, 08:41 PM

Ok, for a few months now my temp gauge would spike every once in a while after I started driving the car a few miles. Today, it got worse, the temp gauge hit the H and stayed there a few miles. I was on my way to work and I had no choice but to keep going. I had bought a new thermostat a while back but just never had a chance to put it on (or kept forgetting). I replaced it this evening, and after I was finished, I cranked it to make sure it was ok. I let it sit idle for a few minutes and when I backed up the car, antifreeze was gushing like crazy. I double checked the hose going to the water jacket over the thermostat to make sure I had a snug fit, but it looked more like it was coming from the water pump area. How could this be happening? It wasn't leaking before I changed the thermostat. I'm praying that I didn't crack the block on my way home. I drove it about 10 minutes while the temp gauge was at the H. Any thoughts/ideas?

Jung918 · 09-02-2006, 10:18 PM

The water pump has a weep hole on top. If it leaks, then you need a new water pump. When I replaced my water pump, I used a pepboys silicone gasket and it started to leak after the car was warmed up. I got some nissan silicone and it's been good ever since. I would say check the thermostate housing again because that is the only piece you should have removed.

ledzeppelin240 · 09-02-2006, 10:49 PM

Pressure testing the coolant system FTW. But if that is not possible I would say that it is leaking from the thermostat housing. The weep hole should not be gushing coolant...Also did you bleed the coolant system of air or just fll it up and go?

RedlineRacer · 09-03-2006, 07:28 AM

Just filled it up. I got a new thermostat housing gasket and used RTV to make sure it had a good seal.

09-02-2006, 08:41 PM	#1
RedlineRacer Zilvia FREAK! Join Date: Sep 2002 Location: Clemson, South Carolina Age: 40 Posts: 1,054 Trader Rating: (0) Feedback Score: 0 reviews	Antifreeze leak!! Ok, for a few months now my temp gauge would spike every once in a while after I started driving the car a few miles. Today, it got worse, the temp gauge hit the H and stayed there a few miles. I was on my way to work and I had no choice but to keep going. I had bought a new thermostat a while back but just never had a chance to put it on (or kept forgetting). I replaced it this evening, and after I was finished, I cranked it to make sure it was ok. I let it sit idle for a few minutes and when I backed up the car, antifreeze was gushing like crazy. I double checked the hose going to the water jacket over the thermostat to make sure I had a snug fit, but it looked more like it was coming from the water pump area. How could this be happening? It wasn't leaking before I changed the thermostat. I'm praying that I didn't crack the block on my way home. I drove it about 10 minutes while the temp gauge was at the H. Any thoughts/ideas?

09-02-2006, 10:18 PM	#2
Jung918 Post Whore! Join Date: Oct 2003 Location: CA Posts: 3,203 Trader Rating: (2) Feedback Score: 2 reviews	The water pump has a weep hole on top. If it leaks, then you need a new water pump. When I replaced my water pump, I used a pepboys silicone gasket and it started to leak after the car was warmed up. I got some nissan silicone and it's been good ever since. I would say check the thermostate housing again because that is the only piece you should have removed. __________________ Sale: Hello Kitty Horn Button S14 Rear Valences K.Y. Gordon the Thief (Tony Chen)

09-02-2006, 10:49 PM	#3
ledzeppelin240 Zilvia Addict Join Date: Sep 2003 Location: Sinse Posts: 688 Trader Rating: (0) Feedback Score: 0 reviews	Pressure testing the coolant system FTW. But if that is not possible I would say that it is leaking from the thermostat housing. The weep hole should not be gushing coolant...Also did you bleed the coolant system of air or just fll it up and go? __________________ Anyway, no drug, not even alcohol, causes the fundamental ills of society. If we're looking for the source of our troubles, we shouldn't test people for drugs, we should test them for stupidity, ignorance, greed and love of power. Looking for: JDM S13 OEM Sideskirts

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09-03-2006, 07:28 AM	#4
RedlineRacer Zilvia FREAK! Join Date: Sep 2002 Location: Clemson, South Carolina Age: 40 Posts: 1,054 Trader Rating: (0) Feedback Score: 0 reviews	Just filled it up. I got a new thermostat housing gasket and used RTV to make sure it had a good seal.