1990 volvo 740 turbo: A/C retro fit kit

[JasonCzerak]

anyone have any suggestions and experience doing retro-ft kit of one of htese or similar cars?

 

[Dl5treez]

Are you adding A/C or converting from R-12?

 

[JasonCzerak]

Are you adding A/C or converting from R-12?

Converting. It's a 740! That was luxury car status back in the day

 

[Dl5treez]

Converting. It's a 740! That was luxury car status back in the day

LOL, for sure for sure.



Most of the time all a person has to do is replace the receiver/dryer/accumulator and screw on the R134a service ports right over the old R12 ports--depending on where in the system the ports are, one or both could be replaced with the dryer/accumulator.



I actually did a R134a conversion on a Corvette and never even changed the dryer... . the compressor oils aren't technically compatible and most of the oil ends up in the dryer/accumulator, so that's the reason for the change. However, that old Vette is still running around with a perfectly functional A/C system after just recovering the R12, screwing on the new service ports, and evac'ing and recharging with R134a. Your mileage may vary.....



Hope this helps,



Dan

 

[RDHamill]

I converted my '88 740 over to Red Tek R12a. I found that the output air was quite a bit colder. I o rings and seals tend to leak on the older volvos, as the aluminum lines corrode. i'm told that the 12a tends to leak less than 134a.

good luck with your conversion.

 

[JasonCzerak]

Where did you guys get these kits?

 

[RDHamill]

I got the Red Tek product from Canadain Tire, I had the guages and other tools . The o rings and such came from the Volvo dealer.

I pulled the 134a out of my '01 Ram , it has Red Tek as well, temp guages says it's colder, buti did not notice as much of a differance as I did on the Volvo.

 

[WDixon27]

the old 740s do well on r134 and will blow pretty cold, i pull the compressor drain the oil and refill with 5. 5 oz of ester, blow the lines condensor and evap clear of old oil toss in a fresh orfis (spelling?!) tube and accumulator, it should take around 2. 1# and i like to rig a simple relay off the compressor signal to run the electric fan which helps out a lot

 

[JasonCzerak]

hmm this is sounding a little outa my league. never messed with A/C stuff before.



What kinda special tools is required?

 

[WDixon27]

a vacuum pump (one of those cheapo air compressor power "pumps" would work) and a way to get the freon in the car are the only things out of the normal, a couple of the wrenches needed are big like a 27 30 and 32mm depending on what brand drier it has and you replace it with

hmm this is sounding a little outa my league. never messed with A/C stuff before.



What kinda special tools is required?