coolant goes mia

[z.Leinbach]

Well I've now had to add about 2gallons-ish since I've replaced the rad cap.. There's no signs on visible leaking on or around the hose connections and no white puffy from the exhaust. I've checked all the fittings and water pump weep hole and notta. Should I just drop the dough and buy whole cooling system??? Rad, hoses, thermostat, water pump kit. If so I was looking at TT dayco kit? Anyone with experience with that product

[MrFeesLaw]

Dumb question, has your oil or transmission fluid been checked lately? If either of them are overfull and you haven't filled them lately, there may be an internal coolant leak, which, while you cant see it will leak from the radiator into the engine, oil pan, or transmission and cause them to be overfull and can damage the engine or trans. That would be the first thing I would check if the radiator was empty and there was no external leak.

[nissanfreak12]

Have you checked the oil make sure its not it there? Just a thought, I doubt it, cause you will know by now.

Chances are you have a leak under the plenum, behind the plenum. It could be small enough to not notice an actually leak, and evaporates enough for the fluid to be going somewhere. Best way to find out is get the car warm, take a mirror to all the areas where there is a hose. If it fogs up, your leak is around there.

With a TT radiator in a NA, you need the bracket for the lower part of the radiator and new brackets for the upper part.

[z.Leinbach]

I meant the day T belt kit lol stupid phone. Trans oil was changed a week ago not over full oil I check regularly (made a habit wanted to own a rotary haha) but no milky feel and not over full

[z.Leinbach]

Found the leak area but can't fully identify what it exactly is?? Above the water pump, but not the water pump 137500 on the water pump no leaky, but it's around the metal piece that's attached to the block that the rad hoses attacth too

[MrFeesLaw]

Can you possibly get a picture? And if the leak isn't visible in the picture maybe use a drawing tool on your computer to circle the leak area. Trying to think of what it could be, but I'm having a hard time remembering the set up for the cooling lines.

[itsa300zx]

Found the leak area but can't fully identify what it exactly is?? Above the water pump, but not the water pump 137500 on the water pump no leaky, but it's around the metal piece that's attached to the block that the rad hoses attacth too

Above the water pump? only one of two things that can leak.
Coolant bypass tubes, they will corrode over time; or the bypass rubber hoses.

tubes: these bolt onto the block.

http://specialtyz.com/shop/default/300z ... -tube.html

rubber hoses: these attach to the above tubes and rad hoses.

http://specialtyz.com/shop/default/300z ... -hose.html

[z.Leinbach]

It's directly under the edge of the TBelt cover but only leaks when there's full pressure on the system

[itsa300zx]

could be these too:

http://specialtyz.com/shop/default/300z ... pipes.html

[z.Leinbach]

Could it possibly be the gaskets behind the hard pipes??? I'm just gonna do the whole Tbelt kit new hoses on the front and one know the hose sizes for the hoses under the plenum

[z.Leinbach]

Also what temp thermo other than the stock 170degree. Would hotter or cooler be better for these engines

[nissanfreak12]

Also what temp thermo other than the stock 170degree. Would hotter or cooler be better for these engines

Keeping the car at 170 degrees is optimal. Hotter could cause damage, running colder will make it run rich . Nissan engineers designed these engines to run around 170.

[z.Leinbach]

Ok I was just curious as I am going to be doing my TBelt an water pump all the seals in the coming weeks due to the leak I have/had so I might as well dive into an get fresh everything