I'm going to change my thermostat this evening, figured I would go ahead and flush the system while I was at it. Any suggestions for this, will a flush kit work on a 91 loyale? Can I just drain, add water and drain until clean? Any advice would be greatly appreciated, thanks.

Yeah - a plain flush kit for 5/8" hose will work. You just splice it into the heater core line and follow the directions. You want to splice into the return from the core so you are back-flushing it - the one that goes into the water pump. The one that comes out of the back of the manifold is the supply.

 

I would dismount the radiator and completely flush it as well as clean out the fins. Really simple to do. Just remove the fans and the two bolts at the top and it will come right out.

 

GD

Just to be sure... the two hoses that run parallel to each other going into the dash area of the car is what I'm looking for? Looks like the one on the right while looking from front to back is going into the water pump. Sorry not the most knowledgeable on this stuff, you guys really are killer for the help!

Yes - those are the two. Just look at the back of the manifold where the lines connect. Whichever one goes into the intake manifold is the one you DO NOT want. You want the one that dissapears under the manifold as that one runs to the water pump.

 

GD

thanks for the help... Got things cleaned out, thermo changed and the heat is working great! Lost the gloves and extra warm hat on the way back from the shop.