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1977 Ford Thunderbird

tony1963 on Sun December 16, 2007 5:39 PM User is offline

Year: 1977
Make: Ford
Model: Thunderbird
Engine Size: 400
Refrigerant Type: R12
Country of Origin: United States

Greetings all,

I have the following vehicle that I am going to service the AC:

This vehicle still has R12 fittings and I'm not sure that I want to change to R134a. The compressor reminds me of a Briggs & Stratton engine. It probably takes 10 HP to operate. Has anyone done a retrofit on this model?

Grove Automotive Group, Inc.

An Alabama Corporation

Edited: Sun December 16, 2007 at 5:40 PM by tony1963

Dougflas on Sun December 16, 2007 5:46 PM User is offline

If I remember, they were a POA non-equalized TXV type system. I'd leave it R12 and make sure ALL the mounting bolts are tight. Those vehicles had vibration problems thru the comporessor mounts; make sure you have the belt tightened to specs.

Chick on Sun December 16, 2007 6:59 PM User is offlineView users profile

That would be a "Briggs and straton" looking York or Techumsa compressor. Most likely the Techumsa..Should say on the tag though...

Email: Chick


Freedoms just another word for nothing left to lose

TRB on Sun December 16, 2007 7:45 PM User is offlineView users profile

Originally posted by: Chick
That would be a "Briggs and straton" looking York or Techumsa compressor. Most likely the Techumsa..Should say on the tag though...

Aluminum body = York
Steel body = Tecumseh

No comment on conversion or not! Tony has already said he will only convert R12 systems. So if he will only convert why the question?

When considering your next auto A/C purchase, please consider the site that supports you:

NickD on Sun December 16, 2007 10:00 PM User is offline

My brother-in-law had one like that same color, purchased it brand new and brought it up from IL for me to help him put mud flaps on it, was hell getting the LR wheel off, but put the flap on that side, the RR was impossible even after sanding the flange on the drum, penetrating oil, and kicking it as hard as I would dare. He took it back to his dealer and they had to torch it off replacing the drum, wheel, and some other parts. His comment the next summer was that when he switched on the AC, was losing 6-7 mpg, I said that can't be right, bring it up, must be way overcharged. He never did, traded it off with other problems, don't recall what.

I heard that same comment from other T-bird owners during that era when the price of gas skyrocketed to over 75 cents a gallon, but you could only put in about five bucks worth after waiting in line, so people were getting to become fuel usage concerned.

Can say our 90 T-bird would get 33-35 mpg whether the AC was on or off, didn't make much difference in that year, maybe you will want to consider revamping the entire system as the price of gas is over a buck a gallon now.

bohica2xo on Mon December 17, 2007 2:06 AM User is offline

Converting that vehicle would be a huge mistake.

Look carefully at the pic. I have mentioned this before, and here is one in the flesh - a TXV/POA system with both a high side receiver / dryer and an accumulator in the suction line. Located at the left edge of the pic.

Getting all of the old mineral oil out of that system takes a magic wand.


"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest."
~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.

NickD on Mon December 17, 2007 8:58 AM User is offline

LOL, back in those days, was doing other things, not going to Chicago to the new car shows was one of them. When my brother-in-law called and said he was coming up with a new T-Bird, was expecting to see a little red sports car pull into the driveway, not a two door Crown Victoria larger than my Buick. What happened to the T-Bird? I think his had the 460 which was the reason why he wanted the mud flaps installed, hit the gas a little, back tires would spin and hit the rear quarter panel with stones. Those car weren't easy to work on either, Ford use to brag it took ten minutes from start to finish to make a new car. Darn things must have been red hot and when you got them, cooled down shrinking the metal so you couldn't take them apart. Recall breaking my Owantonna puller trying to remove a damper pulley off a Ford, had to heat it red hot before it would slide off. Have fun, I did.

Your car looks like it came off the factory floor, don't pay attention to the rust on your MC and compressor pulley, they came new like that, nice car.

tony1963 on Sun January 13, 2008 10:11 PM User is offline

As far as I can tell, the drier unit is mounted up front, beside the condenser. It is about as long as the condenser itself.

The large can in the picture on the passenger's side, integrated with the hoses, appears to be a muffler.

Grove Automotive Group, Inc.

An Alabama Corporation

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