94 z28. No heat and the heat gauge says im over heating. I dont have to drive very far before it gets pretty high. I didnt have coolant in the car it seems but I have since filled it and its still occurring. Any ideas?

 

sounds like the core is plugged you need to flush it reverse of the flow... you want to pump water in towards the water pump im just not sure which end of the core that is... also STOP running the car till this is fixed youll destroy the motor

 

did you blead the air out using the bleading screws? it will overheat if you dont get all the air out.

 

Could also bug out the temp sensor, like basic said, it could make your motor unhappy

 

How do I bleed the air out with the bleeder screws and where are they? I believe I know where they are but just in case im wrong.

 

the bleed screws are here. http://shbox.com/1/bleeders.jpg on mine there is one at the bottome of the throttle body too, i think theres one at the tb on 93 and maybe the 94.

make sure the radiator is full while bleeding it. park the car as steep a hill you have in your area, park with the front of the car on the up side. let cool, fill radiator, with the radiator cap off open the bleed screws one at a time and close them when coolant comes out. refill radiator as needed. the bleed screw on the hose will not bleed untill the car is started. soo once you have bleed the lower screws, mine has one under the tb, one on the thermostat cover and one on the hose that is next to the alternator, this is the one that will not bleed without the motor running. anyways once you have fluid coming out of the other or others then with the cap still off start the motor and bleed the hose screw till fluid comes out, check coolant level in the radiator and fill if needed and put the cap on. take the car for a ride around the block and rebleed the screws without removing the radiator cap. then let it cool and do it again from the start to see if air is still there if so repeat till you get no air on the re bleed.

 

looks like I may have bigger problems than bleeding the radiator. Took a whole gallon of coolant to fill the radiator and it wasnt quite to the top of it still. So started it up to go get more coolant and smoke was billowing out of the driver side tail pipe. And I mean bad. if I let off the gas it obviously wasnt as bad but still quite a bit. Ideas?! Im guessing my only options now are to figure out if its a head, the block, or head gasket. Unless it could be something else. How do I find the culprit?

Also where is the bleed screw on the throttle body?

 

sounds like a blown headgasket. are you getting coolant in the oil?

 

im not sure havent drained the oil to check. Any write ups on changing a head gasket?

 

also compression test on all cylinders would be a good idea. try a search. i dont know of one but im sure its been touched on. also a google would probly come up with some interesting stuff.