Hi this is rotary addiction Today in the garage deep down inside the bat cave i drained radiator liooked inside it very little white buildup. I changed the 195 deg thermostat to a 160deg thermostat i flushed the engine by putting a hose on one end and the same amount of water came out the other end i did the same to the radiator put it all back together ran it for two minutes it didnt spew until the temp guage read a little above the second line what could this be the thermostat is in the right way oh ps it spewed into the over flow tank i found a broken vacuum T but have neglected to relpace it Ill run down to carquest an pick up some Ts and some vacuum line


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Rotary Addiction

 

so the temperature guage isn't going past half way? If not, I'd say the radiator cap is pooched.

 

Time for a TII swap! ...maybe that has nothing to do with the problem, but then at least you'd have a TII

You should definitely check your thermostats to make sure they're working, toss them into a pot of boiling water. Probably not the problem, but at least you'll know.

I don't know what the radiator cap could be doing wrong... but it could be that. I dont know what else could be borked up.

 

If the rad cap isn't holding pressure, you'll get localized boiling, and the car will overheat. Thats my guess as well

 

get the radiator rodded out, cost about 50.00 to get it done.

 

The radiator cap is spring-loaded, and is only supposed to take (I believe) 14lbs of pressure. Any more than 14psi, and it releases, allowing the hot coolant to enter the overflow tank. Also, the whole cooling system is under pressure. This pressure allows the temperature of the water in the system to reach 165-180 degrees farenheight or more without boiling... same reason a pot of water boils at 105 degrees or more at higher elevations. If the rad cap isn't sealing properly, the pressure is lower, and the coolant boils at a lower temperature. So your engine could be cool, running at 130 degrees, but your cooling system is boiling over like it's at 190.

 

SOunds like the water pump isint working. Sounds like the rad cap and t stat are doing their job. When the coolant gets hot, the t stat opens right? DOes the upper rad hose get hot? And when the cap "spews" thats normal when the coolant gets hot for it to do that. Im assuming you mean spews into the overflow tank.

The temp should NEVER go past halfway. Thats a sign of a deteriorated cooling system.

 

You didnt replace the rad cap!!!!

if the overflow tank gets anything in it that soon it is the cap,

 

you know how few people i find know that, even mechanics, very,very few