Question about 1988 Nissan Pathfinder

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I am putting in a new AC compressor. Is there any special seals needed for the connections? I am also converting it to the new refrigerant, is there any specil parts other than the couplings that come in a standard conversion kit at a parts store

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You will alsso have to replace the accumalater dryer. also the o-rings.

Posted on Nov 16, 2009

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Changing the ac compressor in my 2007 Saturn Relay, how do I do it?


Evacuate and recycle the old refrigerant. Disconnect the belt and hoses. remove the old compressor. Use an AC flushing kit to flush out the system. Install the correct oil in the new compressor. Use a vacuum pump to pull a vacuum on the entire system. Use a manifold gauge and refrigerant scale to add exactly the right amount of new refrigerant. Without those special tools, keep your mitts off!

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Ac blowing warm


you can buy a special dye to put in with the refrigerant to see where leaks are. next time it discharges, i would go thru all the a/c connections and replace all the o- rings. nice and cheap to start

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AC compresser kicks in and out


You have a leak in the AC system and the refrigerant charge is low, this is a common failure on this make and model, have repaired dozens of them. You will need to replace the AC compressor and also reseal all the AC lines with the new and improved nitrile rubber green O ring seals. This job requires a car hoist and special tools an it is best left to an expert. Cost is about $1000.00

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What type of freon is in GMC trucks of 1987?


R12.... In 1994 R134a was required, but some changed earlier. Yours may have been converted. If the service ports are threaded it still has R12. Hope this helps.

Jul 05, 2011 | 1987 GMC R1500

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Hi..i had to change a/c condencer, and the a/c compresser, both at the same time.how will i go about charging the system? do i need to add coolent too both ports? or just the low side.?


YOU TAKE TO A GARAGE LET THEM PUMP IT DOWN FIRST MAKE SURE YOU PUT THE RIGHT AMOUNT REFRIGERANT OIL IN COMPRESSOR.IT COME WITH SHIPPING OIL IN IT BUT YOU HAVE TO POUR IT OUT.PUT IN THE RIGHT AMOUNT OF REFRIGERANT OIL IN COMPRESSOR LOOK IN OWNERS MANUAL TO PUT IN THE RIGHT AMOUNT.NOW IF YOUR OLD COMPRESSOR SEIZED OR LOCKED UP THEN LET GARAGE FLUSH OUT METAL SHAVINGS OUT .IF YOU DONT FLUSH OUT SHAVINGS THE NEW COMPRESSOR WILL BE DESTROYED.ALSO YOU HAVE TO REPLACED THE ACCUMULATOR OR ORIFICE TUBE IF EQUIPPED.IF OLD COMPRESSOR DIDNT LOCK UP.PUT NEW REFRIGERANT OIL IN COMPRESSOR IT TAKE AT LEAST 1 OUNCE OF OIL BUT CHECK OWNERS MANUAL ALL VECHICLE HAS DIFFERENT SPECS.AFTER COMPRESSOR OIL BEEN PUT IN EVERYTHING ALL REFRIGERANT LINES TIGHT.TAKE VECHICLE TO A GARAGE THAT DO AIR CONDITIONER WORK.THEY HAVE TO USE A VACUUM PUMP TO PUMP DOWN THE AC SYSTEM TO REMOVE MOISTURE AND LEAK TEST THE SYSTEM WHILE IT PUMP DOWN.IF YOU DONT LET THE GARAGE PUMP DOWN SYSTEM. THE MOISTURE WILL FREEZE UP IN AC SYSTEM CAUSING POOR OR NO COOLING.THE GARAGE GOING TO CHARGE YOU TO PUMP DOWN AND CHARGE UP SYSTEM.IT WOULD BE CHEAPER TO DO THIS THAN TO BUY A VACUUM PUMP AND MANIFOLD GAUGE SET.WHEN DOING AC WORK YOU NEED SPECIAL EQUIPMENT AND TOOLS TO DO THE JOB OR THE AC SYSTEM WILL NOT WORK RIGHT.

Jun 12, 2010 | 2004 Nissan XTerra

2 Answers

There is a squeal sound (high pitch) coming out of


The seal on the AC compressor has probably failed and allowed all the refrigerant and lubricant to be lost. This allows the bearing to run dry and now it is failing and making noise.

1. You could have the AC repaired, the compressor repaired or replaced and the system refilled.

2. You could have a mechanic disconnect the system and possibly remove the compressor (only if this model does not use a belt that relies on the compressor being in place).

3. It is probably way too late to try to refill the AC system with R134a refrigerant as it would just run out past the failed seals.

If anyone has an AC unit that just recently stopped making cold air they should attempt to recharge the unit (if it uses R134a - check your manual or underhood stickers). I just did and saved my compressor and AC unit from further damage.

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My air is blowing warm can i use 1342a?


The real answer to your question is yes, the kit may work. Here is why you shouldn't use a recharge kit: Theoretically, your vehicle's refrigerant (R134a) should last forever. Your AC system is a sealed unit and the refrigerant never gets used up. The only way you can lose refrigerant is by it leaking out of the system. However, if your refrigerant can leak out then air and contaminates can get in. This is bad. A recharge kit simply injects refrigerant into the system. It doesn't evacuate the system of any air and contaminates.This is critical. Your AC system should be hooked up to an AC machine in order to evacuate out all of the air and contaminates in the system. The machine will then hold a vacuum on the system to verify its integrity.Finally, the machine is able to inject new compressor oil that also contains a dye that will enable the leak to be located. If you use that recharge kit, you stand the chance of over pressurizing the AC system and causing premature compressor failure. This can be very expensive. Paying a reputable shop to evacuate and recharge your AC system is much less expensive. If your AC system hasn't operated in over 6 months, it's especially critical that you have the repair to your AC system performed correctly. Your AC system's seals may have dried out and the new compressor oil will be critical in helping to recondition those seals or the seals may need to be replaced. Good luck and hope this helps. keep me posted if you need help to recharge the system.

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3 Answers

Blows air and heater works but no ac


Blowing air just means the fan is working.
No cold air is usually just low refrigerant
but it could be a bad compressor as well.
Have the refrigerant level checked first.

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2 Answers

Ac compressor is not working


$450 is a good price to replace an AC compressor, but $150 and a little elbow grease is much cheaper. Make sure you have all the right tools to fit. If you have a Galant that is 1 to 13 years old don't worry about the refrigerant because it takes the new R134a, non damaging to the environment, unlike the previous refrigerant, chlorine based Freon. After releasing the pressure from the system and disconnecting the battery, loosen the belt via the tention arm. Remove the two lines from the front of the old compressor (2 screws). Then disconnect the sensor, and then the 4 screws holding up the compressor to the engine. Tilt the compressor so that no oil spills on to the ground. Then line up the new compressor (keep the plugs in the holes in until you are ready to re-attach the hoses so the oil does not spill out). I recommend using new gaskets so you have an air tight system. Take out the plugs, then connect the hoses. Tighten everything up, connect the belt, tighten it, recharge the system. It should take about 2 large cans of R134a.
Take to a mechanic friend and have him/her check out your handy work. Have a beer and slap your belly on doing such a fine job.

Jun 23, 2008 | 2004 Mitsubishi Galant

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