'66 Mustang GT with 4 barrel 289. Passenger side has constant flow of hot air coming from somewhere, car runs hot whenever in stop and go traffic, sputters. Was vapor locking but plate fixed. help!

Asked by Apr 17, 2017 at 12:06 AM about the 1966 Ford Mustang Base

Question type: Maintenance & Repair

1 Answer

101,935

Most likely the seals are shot in the heat control doors allowing air to get through the blend doors and into the heater core, so you can either pull the heater box assembly out and redo all the door seals or just put a hot water shut off valve in the supply heater hose, that would be th one coming out of the intake manifold to the heater core. Stop and go was and still is a problem for these Mustangs, that is why so many have went with electric cooling fans, some have wired then up with an over ride switch so they can turn them on at anytime or switch it back to automatic.

1 of 1 people found this helpful.

Your Answer

Ford Mustang Experts

  • #1
    Tom Demyan
    Reputation
    4,620
  • #2
    Bob Beaman
    Reputation
    1,270
  • #3
    COMETGUY61
    Reputation
    1,110
View All

Related Models For Sale

Used Chevrolet Camaro
408 Great Deals out of 30,592 listings starting at $2,495
Used Dodge Charger
422 Great Deals out of 27,992 listings starting at $2,490
Used Chevrolet Corvette
185 Great Deals out of 19,805 listings starting at $2,490

Used Cars For Sale

2018 Ford Mustang For Sale
740 listings starting at $22,485
2017 Ford Mustang For Sale
58 Great Deals out of 15,406 listings starting at $17,490
2016 Ford Mustang For Sale
106 Great Deals out of 3,129 listings starting at $13,891
2015 Ford Mustang For Sale
80 Great Deals out of 2,920 listings starting at $13,274
2014 Ford Mustang For Sale
109 Great Deals out of 2,842 listings starting at $9,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.