'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

118,625

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 people found this helpful.

Your Answer:

Ford Mustang Experts

  • #1
    Tom Demyan
    Reputation
    5,150
  • #2
    F_O_R
    Reputation
    1,710
  • #3
    Bob Beaman
    Reputation
    1,450
View All

Related Models For Sale

Used Chevrolet Camaro
260 Great Deals out of 27,404 listings starting at $2,900
Used Dodge Charger
347 Great Deals out of 29,951 listings starting at $2,000
Used Chevrolet Corvette
87 Great Deals out of 15,194 listings starting at $4,499

Used Cars For Sale

2018 Ford Mustang For Sale
18,663 listings starting at $19,489
2017 Ford Mustang For Sale
96 Great Deals out of 5,996 listings starting at $16,991
2016 Ford Mustang For Sale
36 Great Deals out of 2,419 listings starting at $12,991
2015 Ford Mustang For Sale
19 Great Deals out of 2,418 listings starting at $12,991
2014 Ford Mustang For Sale
21 Great Deals out of 1,812 listings starting at $7,986

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.