I guess that the heater core in my 86 740 Turbo wagon is leaking cause I have antifreeze on the front floor.Heater Core for air conditioned cars Is this as nasty a job as it looks?
[Response:] Try to find out where the coolant is coming from. Usually if the core goes bad you get a coolant mist on the windshield with the defrosters on and you can get some coolant drainage from the A/C condensate line or onto the carpets. As a temporary fix, you can add a stop leak additive to the cooling system. But plan on a new core soon. [Editor] Note that air conditioned cars do not have hoses or a water valve inside the passenger compartment. Cars with heater only have a water valve on the left side of the console against the firewall inside the passenger compartment and this can leak, appearing as though the core is leaking. Heater Core Replacement: See the separate FAQ file which explains the replacement procedure for the Manual Climate Control-equipped car. ACC and ECC are similar. [Tips from Bob] I have done 2 heater cores on 700 series cars. It is very labor intensive. You have to take apart the lower half of the dash and partially disassemble the heater case. The heater
