My 84 Cutlass Supreme has been overheating... I tried bypassing the heater, replaced the thermostat, completely removed the thermostat and checked to make sure fluid was running through the radiator well... nothing has worked and the radiator is flowing fine so my only guess is a blown head gasket? Anyone have any other suggestions before i go tearing my entire engine apart?

 

Water pump bypassing internally?

 

What do you mean? (I'm still kinda new at working on cars, this is my first project car)

 

Either the relief valve in the pump is stuck open so there is no pressure built up to force water through the engine, or there is some other failure in the pump.
Do you have water flow through the block?

 

There is no relief valve in the pump. The bypass is controlled by the thermostat.
The overheating could be caused by a clogged radiator (internally or externally), bad radiator cap, lean condition or even the timing being off.

Pull the dipstick and look to see if the oil looks "frothy" at all or like chocolate milk. Check the coolant for the same thing. Both would be an indicator of a blown head gasket.

 

Couple of my buddies who work on cars have looked at it, i seen one check the oil before, he didn't say anything... one of his suggestions was that I should get a new radiator cap, the kinda that u can lift the tab to relieve the pressure... that could be the reason its overheating? A new radiator cap? We left it open while the vehicle was running and it appears to be flowing the coolant through the radiator fine...

Thanks a lot for ur advice, really appreciate it!