installing a heater core in 66 mustang

You could try searching at mustangandfords.com.

It's pretty easy. You drain the radiator, cut the hoses at the firewall (because you're goint to replace them anyway), detach the control cables (label them and take digital photos), unplug the wires and unscrew the tinnermans nuts that hold the motor to the firewall, and the whole heater box is now free to drop into the passenger footwell. Now pry all the clips off the box and it separates like a clam shell, and you are now in a position to replace the heater core.

180 Out

Yup, unless you break something, this is a 1 hour job. The heater box is right in front of you when you look unter the dash just to the right of "the hump" by the passenger side footwell. Consider yourself lucky. On a fox body 'stang, it would take all day.

Cheers,

Fox body heater core == S&M (without all the fun leather accessories).

It's also easier if you remove the glove box.

Here is a link you can try. Do a google search and you may find more help, but it is pretty basic.

I replaced my core recently wthout problems. I spent the extra time to replace all the foam seals and replaced the cardboard plenum with a plastic one while i was at it.

If you have a leak right now, you can eliminate it quickly by doing the 'mustang loop', which means simply bypassing the core with a loop of hose from the outlet to the inlet. This gives you more time to fix the heater without having to deal with dripping coolant.

Good luck.

Michel.

65 convertible 4bbl dual exhaust (red, naturally)

Word of caution, be sure to drain your coolant below the level of the heater hose outlet and inlet before you start, or you will end up with coolant all over the place! Even so, remember that there will still be coolant in the core and hoses, so be prepared.

Michel.

Absolutely. A good trick is to use compressed air to blow all the coolant out of the core before you start taking things apart. You never get 100% out, but it greatly reduces the mess. You just cut the heater hoses (since, as someone else pointed out, you'll be replacing them anyway). Stick one of the hose stubs in a bucket and use your compressed air blower tool to shoot air into the other stub. After about 20 seconds, it should be more or less empty.

Cheers,