I'll just add to what Michael wrote along with some specifics. There are pre-formed hoses that should be used--they make the job much easier. If possible use Volvo brand hoses. They are of top quality-I can't vouch for any aftermarket hoses. I just used a set on my Oldsmobile V8 engined '93 245. I was able to utilize all Volvo parts (including two fixed pipe sections-one from a 240 and one from a 140). The Volvo hose clamps are the best--they do not have serrations squeezing into the rubber. They are driven by a screw that has a flat screwdriver slot and a 7mm hex--if you have them, use a 1/4 drive ratchet, extension and 7mm socket (sometimes a universal joint or universal socket make it easier. If you don't have them, borrow some. They make the job that much easier. Access to the hose that comes from a pipe that wraps around the head can be difficult. Remove the hood along with the hinges (mark the bracket to body location). That way you can lean over and see the hose & clamp by looking straight down--the same for the connections at the heater valve. The upper pipe for the heater goes to the hose running under the intake manifold to the outlet on the block (that's the pressure side feeding the heater). The lower heater valve pipe's hose goes to the hard pipe which returns coolant to the water pump. It's kind of crowded under there but you should be able to see the block outlet looking straight down through the intake runners. With the clamps loosened slice the hoses length wise at the pipes to release them. Unless they are completely rusted the originals should all be re-usable. Volvo brand heater hoses usually come with new clamps. When you re-fill the cooling system leave the heater valve open. If the engine reaches operating temp and you don't have heat yet -- just hold the throttle open at maybe 2k or 2.5k rpm and coolant should start circulating through the heater core. - have fun - Dave