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Help with Grand Wagoneer AC

grandwagger on Fri July 03, 2009 4:30 AM User is offline

Year: 1989
Make: Jeep
Model: Grand Wagoneer
Engine Size: 360 V8
Refrigerant Type: R134a
Country of Origin: United States

I'm new to the forum, but hope someone can help me with my AC dilemma.

About 2 months ago, my Jeep was at my regular mechanic's because of a radiator leak. I had also noticed that the AC compressor was cycling frequently and loudly, but still seemed to cool.

The radiator was replaced and my mechanic told me that the refrigerant charge was low, and that he recommended applying a R134a "conversion kit" and changing to R134a.

This worked up until a week or so ago when the system cooled less and less and finally not at all.

My mechanic checked the AC and tells me the compressor is leaking and will need replacement.

This was the stock AC until changed over to R134a:

Sanden SD709
Model 7445
R-12

The mechanic quoted me some extremely high parts prices, so I told him I would look around for some more economical colutions.

I am now considering some options which I hope someone might comment on:

Option 1:

Evacuate system, recover R134a and revert to R12
Keep everything the same except replace receiver-drier and replace leaky compressor with reman SD709 Model 7445. Maybe all new R134a resistent hoses.

Option 2:

Revert to R12 but prepare system as completely as possible for eventual R134a upgrade.
All new o-ring type hoses
New Sanden SD7H15 model 4706
replace receiver-drier


Option 3:

R134a upgrade done right.
All new o-ring type hoses
New Sanden SD7H15 model 4706
Replace receiver-drier
Replace expansion valve
Replace high-pressure cutout as in Jeep TSB
Replace condenser with parallel flow type.


I am really tempted to do Option 1, but is it even allowed to change back to R12 from R134a? If it is, it seems to me that by replacing the compressor and hoses and eliminating leaks, it could be possible to get another 5 years out of it, plus it would cool as designed.

I also like option 3 for the long term, but it appears to me that there is some custom bracket fabrication needed for the parallel flow condensen that might be difficult to get a mechanic to take on.

I would appreciate any comments.

Thanks in advance!


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1989 Grand Wagoneer

TRB on Fri July 03, 2009 11:20 AM User is offlineView users profile

New Sanden, Drier, Flush, Mineral oil and R12.

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Contact: ACKits.com

bohica2xo on Sat July 04, 2009 3:01 AM User is offline

Quote
Originally posted by: TRB
New Sanden, Drier, Flush, Mineral oil and R12.

Final step, remove jack handle from vehicle, apply liberally to bozo that installed death kit and had the sack to actually charge you for that damage.

Tim has it right, go back to R12, and a NEW SD709. My 1993 vintage 709 has 160k miles of abuse, and it is still just fine.

B.

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"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.

grandwagger on Sat July 04, 2009 1:07 PM User is offline

Quote
Originally posted by: bohica2xo
Quote
Originally posted by: TRB
New Sanden, Drier, Flush, Mineral oil and R12.



Final step, remove jack handle from vehicle, apply liberally to bozo that installed death kit and had the sack to actually charge you for that damage.



Tim has it right, go back to R12, and a NEW SD709. My 1993 vintage 709 has 160k miles of abuse, and it is still just fine.



B.


Thanks for the advice- I thought the same thing (about the jack handle)

He's usually pretty good, though.

The SD709 isn't manufactured any longer in the model I need (7445), so the best I can do is a reman.

Also, would the failure of the compressor seals also damage/clog the condenser, expansion valve or evaporator?


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1989 Grand Wagoneer

TRB on Sat July 04, 2009 2:01 PM User is offlineView users profile

Nothing special about this compressor except the Tube-O fittings. Change your fitting on the end of your hoses to a #10 & #8 o-ring and use the Seltec compressor.





-------------------------

When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

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