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A packaged system is great, though the drawback of having to adapt your dash for the heater controls. Hopefully all the mounting and belts work, which may not match all intake manifolds and accessories. An AC-only under-dash "knee-knocker" box keeps your heater box and its dash controls. A...

That is a very short fan clutch, like the one in my 1985 M-B 300D. For those with the opposite problem of no clearance, the M-B fan bolts to the water pump (same pilot hole diameter), plus the nylon fan is thinner. Many rodders use a 1990's Jaguar fan-clutch for tight clearance. So little...

Two 6 oz cans of Duracool works for me. You want to see ~35 psig on the low side with compressor running if a 70 F day and ~70 psig on both sides when off after sitting a long time. Yes, the cans feel empty, compared to a 16 oz R-12 can, but they work.

I had a can of R-12 on the shelf and a fill hose for it I no longer needed. Sold it on ebay for ~$60. Most others I saw advertised asked $100 for a can. Have prices dropped? Strangely, I found that can left on a bench over the river when out jogging ~10 yrs ago (nobody around), so grabbed it...

If your hoses are pristine, you can keep using them. I recall that R-134A leaks a bit more than R-12 since a smaller molecule, which is one reason they switched to "barrier hose" which has an inner plastic liner. HC refrigerants are mostly a propane-butane mixture which might be a smaller...

Not a big problem with R-12, though the mineral oil does absorb a little moisture. If you had R-134A, the PAG oil strongly absorbs moisture to form corrosive acids. Regardless, keep the tubes capped off if you unbolt. Don't leave open to the air for more than a day. I wouldn't change to...

If I recall the factory AC in my 1969 Dart with the pneumo-electric 5-button pushbutton switch, there are 3 vacuum hoses to the engine bay. One is the vacuum source at the intake manifold, usually shared with the big tube to the brake booster, a spider-tube fitting. The other two hoses go to...

You mean an electrical switch, with gas tube stuck in the evaporator fins? The factory AC in my 1969 Dart only had the gas-tube expansion valve on engine bay side near firewall. Perhaps later cars had an e-switch at the evaporator (in climate box). My 1985 M-B has that, termed "anti-ice...

When my 1985 M-B had an overheating problem, I tried using an IR gun, but never got consistent readings which helped diagnose. But, when I shot at a T-stat in a pot of hot water, it gave amazingly close readings to a thermometer in the water, even shooting thru the water. Keep in mind that its...

Strange since one adds refrigerant at the low-side port. If you didn't have a gage attached to the high-side port, perhaps the Schrader valve had been stuck open and the oil flowing thru it lubricated it enough to close again. If you had left the system with no pressure for a long time...

Your question is if you can add R-1234yc to a system with R-134A refrigerant? The answer is "no" since the EPA does not allow mixing refrigerants. All refrigerant must first be recovered by an approved shop tool. Oils must be changed if required. You then evacuate the system before adding...

Funniest thing is that R-134A was outlawed because a potent "greenhouse gas" (worse than CO2), so outlawed. It replaced R-12 which was outlawed since it threatened increasing the Ozone Hole. They don't talk about that anymore and turned out an unnecessary fuss. The media stories of the day...

$10/can is still cheap. If R-134A gets pricey like R-12, can always use HC refrigerant. I recall $10/can last time I bought a case. I use Duracool, but Envirosafe is another. Some are termed R-12HC or such. Works slightly better than Freon. Never a fire in millions of cars using it for...

Or do like me and buy a MasterCool crimper, hoses, and ferrules then sell it when done. I've made AC hoses for 5 cars with it, plus oil cooler hoses for my M-B, and coolant hoses for my 2002 minivan (used silicone heater hose). Once you have a hammer ... Or you could use Oeticker stepless ear...

I bought a different rear head when I put a Sanden on my 1985 M-B 300D. There were about 20 different choices from a vendor on ebay (with photos), all ~$20 each. That was for an SD7 Sanden (7-bolts). If you have the earlier 5-bolt (SD508? recall), might not be those choices. In my case, I...

Hardlines are smaller and lighter, especially if aluminum. You can't bend aluminum tubing much without cracking. I have only used them when part of OE design or short sections when connecting to something like a condenser which has special "peanut" fittings for which a hardline w/ fitting is...

I've always started with 1 can for a dry system (add oil to compressor first, measure it), whether R-12, R-134A, or Duracool. That gives some cooling, but usually see ~25 psig low-side w/ compressor running on an 80 F day. I then add another full can, stopping before I read 50 psig, though...

The main efficiency comes from having a larger condenser and parallel-flow is 30% more efficient for the same size. Duracool claims their "Oil Chill" is more efficient since stays in the compressor better. I think that is Hella PAO 68 which is the best oil - doesn't absorb moisture to form...

I used generic filter/driers on mine, with #6 O-ring fittings. One I had was strange because the thread was a different size than standard #6 nuts, so couldn't use it. Otherwise, consider the orientation of the in and out fittings. Some are 180 deg and some 90 deg. I mounted most in front of...

Those will work and appear to be standard O-ring type. Their clamps are Oeticker stepless ear-clamps (or copy), in a twin arrangement. When I use Oeticker clamps, I also use two and stagger the ears 180 deg. I've used them when I don't have a ferrule die for that size or working on-car where...

OP is in Austria. EU banned R-134A for new cars in 2013. https://europe.autonews.com/article/20130824/ANE/130829947/toyota-switches-back-to-banned-refrigerant-in-europe . But, it can likely still be bought to service older cars. Caused a big stink after a M-B test showed R-1234yc can burn to...

Presumably you have brackets to mount the Sanden compressor. Easy for a V-8, not so for a slant-six, but there is a long post here for those options. I think a larger condenser is always good, even if bigger than the radiator opening and parallel-flow is 30% more efficient. An integral...

Many clutch fans will fit. There may have only been two diameters for water pump shafts since some fan clutches I've bought have a spacer ring for different applications. I recall my Mopars don't use the spacer, so perhaps Fords did. I recall that Chevy water pumps have 3 bolts so wouldn't...

I recently put a new headliner in my 1965 Dart. I used the aluminum foil-bubble plastic sheet at Home Depot, using several glues - Gorilla Glue (polyurethane which foams a bit), ER7000, and drops of superglue to hold it while the others cure and holding it up with the bows. I used one layer of...

When restoring my 1964 and 1965 non-AC cars with add-on knee-knocker AC boxes, I don't recall finding the correct duct hose with different size ends and the OE fabric hose was falling apart. Indeed, just replacing the brittle dash defrost vents was pricey, but shopping around I recall I found...

You will have to drill 2 holes thru the firewall of a non-factory AC car for any type of AC compressor addition, unless you use the systems which replace the cabin climate box and route the hoses thru the big hole where your cabin fan used to sit. I suggested a Sanden because RV2 are getting...

The RV2 works well and is reliable, but quite a beast. Definitely don't buy factory AC parts for a non-AC car since it won't fit (firewall differs, post above). If you have a factory AC car, you could install a modern Sanden compressor to work with your existing climate box and evaporator...

A long thread on AC compressor options for a slant, which everyone interested should read: Air conditioning options?

True that it wasn't worded quite correctly, so could be parsed either way.

Haven't heard that, and I think you misread. No way a slant-six would fit in the K-car engine bay. The straight-six just barely fit in the A-bodies. In my 1964, there isn't room to fit even the shortest clutch fan (Jaguar or M-B). Note how they recessed the water pump on the side of the...