The 1991 VW Jetta low pressure port can be found on the air conditioning compressor. There are two ports, the low pressure port will be labeled as such.
Recharging the air conditioning is simple with a recharge kit. Connects the Freon bottle to the recharge port on the air conditioner compressor. Release the Freon into the compressor.
Larger hose from the air compressor
Jetta - electronics company - was created in 1991.
Originally this car had R12 refrigerant. It may have since been updated to accept R134a. The coolant/radiator system is not part of the air conditioning system. But the hot antifreeze-coolant is used for the heating system...
It depends on what state you live in. Some states require only professional technicians to do repairs on the air conditioning systems. One main reason being, if you by chance were to hook up the can of refrigerant to the high side, you could be putting 200-300 pounds of pressure into a can designed to hold 75-100 pounds. That could be very disasterous. The low side has a suction that pulls the refrigerant out of the can.
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www.vwvortex.com register!
Try MOTORLIT.COM.
with a new compressor is a good place to look and see if it's working then see if the fan to blow it is still working you fix it with a new ac compressor pulley and recharge the freon in the car
Should be approx. 4.5L with an oil filter change. I recommend using Shell rotella 15w-40 oil. -1991 Diesel Jetta/1986 Diesel Golf/ 1985 Gas Jetta owner
A 1991 VW Jetta's power steering reservoir is located towards the front of the engine bay. The unit can be seen placed on top of the power steering pump.
The firing order for a VW Jetta 1991 4-cylinder 1.8 is 1, 3, 4, 2. The number 1 cylinder is closest to the pulley on the engine.