1991 302v8: Can someone help me located the fitting on the low side of the ac system for recharging? Thanks,

 

Hey Everyone... I know that this can't be too difficult of a question, I would appreciate any help that you can offer.


Thanks,

 

its on or very near the accumulator which is back LHS of motor next to air heater box when facing rear of vehicle with hood up.

From the LH end of the Radiator, follow a steel then plastic hose towards the back of the compartment to the accumulator - it'll be on or near it. Look for a black plastic cap.

 

Do you have r-12 or r-134a? The 12 will have screw on fittings of the same size. The 134a will have quick disconnect connectors of 2 different sizes. The low pressure side will be the smaller of the two and may have a blue cap on it. My geuss is that you have r-12. If you charge the system yourself be sure to get the right type of freon or get one that will mix with your type. You cannot buy r-12 w/o an a/c permit but they do have freon that will mix at most of your local parts stores. If your having to recharge you most likely have a leak, so you'll be doing this again in the near future, depending on how big the leak is.

If you have r-12 the best thing you can do is convert it to 134a. You'll need to replace the orifice tube,drier/accumulator, and the compressor. Then you flush the the lines, condensor, and evaporator core; you can flush the compressor and change the oil in it but with the miles you probably have on it you'll be better to replace it. The entire conversion, if done by you, will take a saturday and about $500 to $750 in parts. If you take it to the shop it'll cost double or more, unless the shop has r-12 left in stock and can find and seal the leak. The last time I went to buy r-12 the price was around $110 a pound, this due to the fact it's no longer made and all that is left is in controlled distribution from the govt through the old manufacturers( mainly dupont).

 

In the UK there is a replacment for R-12 which is freely avaliable and safer than r-12 that is backwards compatiable to r-12 components so there is less cost involved to recharge it.

 

The low side fitting is he fitting right next to the accumulator.

 

Yea I have a really large bottle of R-12, my dad purchased it back in the 1990's right before it was outlawed. I am guessing it is 30+ pounds. Lucky me Thanks for the help.

 

Sittin on about $600 to $1000. Keep it on the low.