E30 AC refill valve

[Brice325i]

Trying to refill the R12 in my e30 but i can't figure out which port is the low pressure valve. Help!

[rcsoundn1]

there is a rule of thumb here, but it escapes me for right now. Dam.

[jeffnhiscars]

The blue one with the "L" for low pressure, but it looks like you have r134 adapters on there

[Brice325i]

There is also a port near the headlights when you take the plastic panel off

[Brice325i]

The blue one with the "L" for low pressure, but it looks like you have r134 adapters on there

My bad i actually have R 134 a. Forgot they switched it. So the blue L is low right? just want to make sure so the can doesn't explode

[supermansocks95]

I believe it is the one by the tower

[Brice325i]

I believe it is the one by the tower

What tower?

[Brice325i]

i believe it is the one by the tower

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[jeffnhiscars]

[ATTACH]107763[/ATTACH]

That's your dryer. If the system is empty you need to change that too and pull a deep vacuum or you are wasting time and money. Otherwise ignore the dryer and top up your r134a at the port with the blue cap. It's the smaller of the 2 ports.

[Das Delfin]

Yes L is for low.. the low side is near the shock tower

Do the vacuum test to make sure it will even work. You can rent everything you need at autozone.

If you replace your dryer there are two different kinds. One is made with plugs for a 2 pressure switch system (what you have) and the other is made for the updated single pressure switch. Considering the new switches come with "r134a" stamped on them, you want to upgrade to that & grab the dryer with the single port.

The dryer removes moisture from the system so it's very important to make sure it's in good shape.

Just look it up on realoem and then google search the part numbers for pictures. Shouldn't cost you too much for everything

[roguetoaster]

When replacing the dryer, know that it does not come with a high pressure port like the previous version, so you will have to work a bit harder to charge the system after you evacuate it.

[trippmann]

anyone know where you can get r12?

[roguetoaster]

First you need a license, second, you need to pay about $100/lb.

There are substitutes out there, so search if you don't want to convert.

[Das Delfin]

The high pressure port is the black one in OP's second picture

[Kevinl]

anyone know where you can get r12?

Craigslist bought 15 lb can for $150

Imo id rather remove the ac than use 134a in these cars i did the paralell flow condenser and all that it still sucked