Air Conditioning Input

[pcain]

Hello    I have an 89 w/ the 16v engine. I see there are many differences in the systems by engine model? Does anyone know where to buy hoses for the system, or do you have to have them specially made? Do all the models take 38 oz of R-12? no sticker on mine. Do people flush the system, and replace the O rings? Is it better to recharge w/ R-12 or change to R-134?  Are there any common problems seen on these cars? I have no pressure in mine, checking to see how it holds a vacume now.

Thanks   Philip

[marty14]

from the 89 book:

 

note any part # starting with 4425 is for the 16 valve only

 

6015 756 1 STRAP

2 #3849 406 1 SWITCH, w/O-Ring, A/C Damped Cycling Clutch Pressure

3 #4176 999 1 VALVE, Expansion (H-Type)

4 6032 572 2 SCREW, Expansion Valve Mtg.

5 #3846 834 1 GASKET, A/C Suction And Liq. Line Mtg. To H-Valve

6 4425 119 1 LINE, Discharge, Suction, Liquid Line With Switch

7 6101 453 1 SCREW, Suction And Liquid Line Mtg.

8 #4372 394 1 STRAP, Ground

9 3849 468 1 VALVE, A/C Discharge And Suction Line Check

10 4425 205 1 HOSE, w/Sleeve, A/C Htr. Eng. To Valve

11 4425 203 1 HOSE, w/Sleeve, A/C Htr. Valve To Core

12 2448 770 AR CLAMP

13 6015 945 1 STRAP, A/C Vac. Line To Hose

14 2837 876 1 CONNECTOR, A/C Vacuum Hose (In Line)

15 4425 221 1 HOSE, w/Sleeve, A/C Htr. Core To Valve

16 4425 215 1 BRACKET, A/C Htr. Water Valve Mtg.

17 4462 375 1 VALVE, A/C Htr. Water (4 Port)

18 6100 288 2 SCREW and WASHER

6501 510 2 GROMMET

19 6101 442 2 U-NUT, Cond. Mtg.

20 4462 482 1 HOSE, A/C Heater Valve to Pump

21 4425 202 AR CLAMP, Thermo Hose By Pass

22 6101 301 1 SCREW, A/C Line To Compressor

23 0153 640 AR CLAMP, Htr. Hose At Eng.

24 4443 136 1 CONDENSER

25 3846 835 1 GASKET, A/C Discharge And Liq. Line Mtg. To Cond.

26 6101 446 AR NUT, Discharge And Liq. Line Mtg. To Cond.

27 3848 585 1 CAP, Discharge And Liq. Check Valve

28 4462 020 1 DRIER, w/Bracket, Filter

29 #3847 083 1 GASKET, Suction Discharge Liq. Line Mtg. To Drier

30 3848 021 1 CAP

31 SCREW, (Not Serviced)

32 6033 562 AR NUT, w/Washer, Liquid Line To Drier

33 SCREW, (Not Serviced)

34 SCREW, (Not Serviced)

35 SCREW, (Not Serviced)

4462 013 1 BRACKET, Suction Line Support

4462 305 1 VALVE, A/C High Pressure Relief

 

and for the non-16 valve  for comparison:

 

1 SCREW, (Not Serviced)

2 #4462 482 1 HOSE, A/C Heater Valve to Pump

3 2448 770 AR CLAMP

4 6501 750 AR J-NUT

5 4462 378 1 BRACKET, A/C Htr. Hose Retaining

6 4462 375 1 VALVE, Water (4 Port)

7 1315 466 AR HOSE, 5/8" I.D., 50 Ft. Roll

8 #4462 592 1 TUBE, A/C Htr., Eng. To Hose

9 3848 948 1 WASHER, Flare, A/C Heater Tube

10 6032 290 1 CONNECTOR, Water By-Pass

11 2837 876 1 CONNECTOR, A/C Vacuum Hose

12 4462 406 1 HOSE, A/C Heater Valve To Core

4462 374 1 HOSE, A/C, Htr. Tube to Valve

13 4462 083 1 BRACKET, A/C Heater, Dual Hose Mtg.

14 NUT, (Not Serviced)

15 6015 945 AR STRAP, A/C Vacuum

16 3780 508 AR HOSE, A/C Vacuum Ext.

17 #4462 844 1 BRACKET, Water Valve Mtg.

18 4443 136 1 CONDENSER

4462 379 1 ISOLATOR, A/C Cond. Btn. Mtg.

19 3846 835 1 GASKET, A/C Disch. And Liquid Line To Cond.

20 #4462 333 1 LINE, Valve Discharge and Liquid

21 6100 041 AR U-NUT

22 6100 051 AR NUT

23 6500 517 AR SCREW

24 3848 585 1 CAP, Check Valve

25 3848 522 1 CLIP, A/C Suction And Discharge Hose

26 0118 614 AR NUT, w/Washer

27 #4462 329 1 DRIER

4462 013 1 BRACKET, A/C Suction Line Support

28 9423 951 AR SCREW

29 # LINE, Suction And Liquid

4462 332 1 w/o Low Pressure Switch

3849 928 1 for Low Pressure Switch

30 #5210 377 1 SWITCH, A/C Low Pressure Cut Off

30A 3441 105 1 SEAL, A/C Low Pressure Cut Off Switch

31 6015 756 1 STRAP

32 SCREW, (Not Serviced)

33 6100 288 AR SCREW

34 3849 468 1 VALVE, A/C Damper Pressure Switch

35 #3847 081 1 GASKET, A/C Discharge Fitting To Compressor

36 #3847 147 1 PILOT, A/C Suction And Liquid Line Mounting

37 #4176 999 1 VALVE, Expansion (H-Type)

38 6032 572 AR SCREW

39 #3846 834 1 GASKET, A/C Suction and Liquid Line Mtg. to H Valve

40 6101 453 AR SCREW

41 3848 021 1 CAP, A/C Compressor Check Valve Fitting

42 6501 510 1 GROMMET

43 3846 836 1 GASKET, A/C Expansion Valve Mtg.

44 #3847 083 1 GASKET, A/C Discharge Liquid Line Mtg. to Drier

45 3849 335 1 SWITCH, A/C High Pressure Cut Out

4462 305 1 VALVE, A/C High Pressure Relief

4462 946 1 SEAL, A/C High Pressure Relief Valve

4462 482 1 HOSE, A/C, Heater Valve to Pump

[pcain]

Hello Marty  Thank You  Did that info come out of the workshop manual, or from a parts manual?  I noticed that the compresser's and the high and low presser lines are different, have one of each of the models.  The 16v has a different compresser too.  I was hoping to find someone here that has worked on the system.

[marty14]

from the factory part book

[Digger914]

Hello Marty  Thank You  Did that info come out of the workshop manual, or from a parts manual?  I noticed that the compresser's and the high and low presser lines are different, have one of each of the models.  The 16v has a different compresser too.  I was hoping to find someone here that has worked on the system.

AC is AC and this is an old system, but it's also been around a long time and used on lots of cars for lots of years, so good used compressors are easy to find at the local parts yard. When you replace a part you replace the seal, you can get by without, but why risk $50 worth of freon to save $5 on a seal.

 

Flush the system if you want to, compressors can loose the internal seal between the high and low sides and it's irritating, but no big deal. If you have this problem you will know within a couple days after you charge the system. If you replace a bad compressor and find any metalic residue inside the line, you best flush the system.

 

A brand new tailor made AC hose set for a 20 year old Ford Tarus is hard to find and they made millions of those cars, odds of finding a new, old hose set for your car are darn slim. If you need them the rubber lines can be replaced, if you're only going to do this once, it cost less to have it done, than it does to buy what you need to do it yourself. A good local service station or used car dealer will know where the closest place is to get this done.

 

The AC isn't much different than a tire, they all leak a little and eventually need a little pumping up. Unless it's a busted bead or blowout, a flat tire will still have some air in it unless it's been flat for way to long and if you get nothing out of the high or low side of your AC when you press the needle valve, plan on replacing the dryer.

 

Really doesn't matter what you had for freon, when you vac the AC system you're guaranteed not to have any, go get yourself a 134 conversion kit, should come  with new valves. Barring holes from cracks, rocks or rust, a sticky old valve is your most likely leak. Vacuum test won't show a weepy rubber pressure line, for that you need pressure, so take a good look at the rubber skin before charging.