I think I've got a blown head gasket on my 86 sprint - the water in the radiator is fully of sludgy grey brown goo - and the water was way low and the car overheats seriously on just a fairly short drive and now the oil pressure light is on, too ... there are no external leaks.
If I'm right, does that meant that the engine needs tearing down completely in order to remove the sludge from the cooling galleries - or is there some way of cleaning it out adequately without disassembly? I'm sure the radiator needs complete cleaning.
DavidB