i was sitting at a stop light for a little longer than normal today.. and my car started to overheat.. i drove away to try to move out of traffic.. and the temp went back down.. then i tried it again.. same thing.. went up.. but as soon as i drive it goes down.. what would cause that to happen?

 

do you have the stock fan? is the fan shroud in good shape? are you losing coolant?

 

Maybe air bubbles in coolant system.

 

FAN-CLUTCH

 

thats what im thinking if he still has the stock setup.

or it could be he removed the fan shroud, tried to use electric fans, or maybe the thermostat is stuck

 

i still have the stock fan.. fan shroud is still on .. in good condition..

 

^ Id say fans maybe sticking T stat

 

after thinking for a long time.. im thinking because i have a lightweight crank pulley that is smaller.. it maybe cause my fan to spin slower.. causing it to overheat.. is that possible?

 

have you checked the obious ?? Coolant level, thermo stat, and last your fan clutch

 

First i would remove that lightweight crank pulley because it will distroy your engine.
Start the car and when it gets to normal operation temp touch the lower rad hose if it's still cold that means the thermostat is stuck.
Did you replace the water pump recently? How much coolant you have in the radiator and please don't open it when it's hot.
How long has it been doing this? did you replace the coolant recently? how does the coolant hoses look?
Can you try a different fan clutch? is you tensioner spinning free? how about the pulley on the a/c compressor did spin free?

 

sounds like water pump or head gasket.

Have you ever had it either replaced?

On a lighter note, it could just low on coolant, or air in the system

 

i was low on coolant.. have a small leak.. i will be replacing radiator soon.. and water pump also.. thanks for the info guys!

 

and please remove the lightweight crank pulley. you need one that dampers the vibrations in the crankshaft. otherwise over time you engine will slowly fail

 

Yeah the crank pulley you have now will destroy your engine. What exactly was leaking?

 

the nipple by the cap of the radiator is broken.. so its leaking from there..