hey guys well i have an 87 turboII neways its all stock except exhaust when driving normal keeping revs lets say below 5k? the car stays at a quarter but after hard driving and constant high reving the needs looks like its reaching half after i see it there i stop messing around cause i cant afford a blown coolant seal but any ideas what it can be thats it warming up so much?
TwEaK

 

Clogged radiator?
This happing at high speeds or just low speeds? Or just anytime you beat on it a bit? Does it cool off when you let it idle?
I'd first start by changing the fluid and checking to see if the radiator is clogged.

Also Arron Cake has a great write up on how to trouble shoot the cooling system.. search for it.

 

this is just anytime i beat on it a bit.... and yes once i go back to idle its cools right back down BUT! i think i might have found my problem... the pulley that connects the underdrive pully with the waterpump and the alt well it is SUPER loose im gonna go purchase a new one today for a smaller one and re tighten everything because at high rpms's i dont think the pulley is touching because all my lights dim out at high rpm =/ that could be it right?
TwEaK