Anyone know a source for new heater/ac vaccum motors. I have searched the web and not turned up anything. I am abt to tackle my heater core replacement and want to know a source B4 I get started. How much vac to determine if a motor needs replacement? I wud prefer replacing vac motor/s and fan motor while I have everything apart. Any suggestions appreciated.
There is no vacuum motor just vacuum off the engine which feeds to the vacuum canister. From the vacuum canister the vacuum line heads to the heater controls driver side next to the gauges. There the manifold controlled by the levers on the heater controls sends vacuum to various solenoids. They are year specific! I tried installing 76 controls into my 71 maverick and had to hybrid both units to get one functional one. I'm going to take a stab at run down for testing 1. Remove the vacuum tube harness from the back of the heater/air controls. 2. Using a vacuum hand pump (easy buy at harbor freight) attach it one at a time to the vacuum lines. Test each line to see which one holds vacuum. (leaks can be in the line and/or soleniod) 3. While under vacuum see if the soleniod as compressed. If not then replace. 4. Check the vacuum feed line from canister, plug the line at one end then test. 5. Plug the vacuum canister and test vacuum from engine side. If it holds vacuum your good. 6. You also have the option to test each soleniod using a seperate vacuum line and hand pump.
Flynbrd! Thanks for ur reply. However, I have a colored diagram of vac. selector control assembly and the entire interior vac. sys including the under hood canister. It refers/displays 3 vac motors and a water valve vac. switch. What u have outlined makes sense. I just don't understand why u say no vac motors. Do u refer to solenoids as motors? Also, If a solenoid is defective do u have a source where I can acquire one? I do plan on using a hand pump w/ gauge. Once I get into it I will get back with you.
...Also called "vacuum motors." Those "solenoids", I call them actuators, but whatever they are the proper name is vacuum motor. Which is confusing and not a great name for them, but they didn't ask my opinion.
Mojo As per the ford parts listing they are called Vacuum motors or vacuum pull off You may contact Old Air Products or ebay or used as per part# oldairproducts.com Check your vacuum can ( old style juice can ) the pot metal fitting on top will have seal under it and will leak . When you replace it Don't mount it back in the same place ( the new style ones are plastic and will melt with exhaust heat )..
