R34 GTT AC not working - compressor not starting

[darkhalf]

On 16/04/2022 at 7:03 PM, GTSBoy said:

Hi Matt! I still don't know exactly what Brenton ended up doing to make mine work! Never saw the final wiring diagram, then got distracted.

We just had to get the compressor output in the correct voltage range to make it happy. Can't remember how we did that. Resistors or something. Was a while ago!

[GoHashiriya]

Well here we are, a year later and my AC has depleted again. I refilled it back in Feb only for it to lose refrigerant a month later. Luckily, as recommended by others on here, I added dye this time around and, whilst using a UV light, have found traces of semen dye around the compressor connector. I'm going to get a rebuilt compressor whilst I'm in there, seeing as they're cheapish in JP. 

Now, my question is, how difficult is it to remove the AC compressor? any special tools needed? from looking at other cars I've seen you need to disconnect the pipe that runs to the cabin, then a couple around the compressor. probably the intake pipe too - engine is stock. 

Yes, yes I know, cannot vent it to atmosphere. I don't know the regs in Japan but it's probably incomprehendible anyway. The system is most likely empty by now as it's been over a month since the AC pressure switch was triggered. 

[joshuaho96]

35 minutes ago, GoHashiriya said:

Well here we are, a year later and my AC has depleted again. I refilled it back in Feb only for it to lose refrigerant a month later. Luckily, as recommended by others on here, I added dye this time around and, whilst using a UV light, have found traces of semen dye around the compressor connector. I'm going to get a rebuilt compressor whilst I'm in there, seeing as they're cheapish in JP. 

Now, my question is, how difficult is it to remove the AC compressor? any special tools needed? from looking at other cars I've seen you need to disconnect the pipe that runs to the cabin, then a couple around the compressor. probably the intake pipe too - engine is stock. 

Yes, yes I know, cannot vent it to atmosphere. I don't know the regs in Japan but it's probably incomprehendible anyway. The system is most likely empty by now as it's been over a month since the AC pressure switch was triggered. 

Shrug, I would vacuum it anyways just in case but yeah most likely it has all vented out anyways. HA section of the R34 manual details how to remove it, doesn't appear to be anything crazy but it will almost certainly be annoying anyways because Nissan. Expect to remove power steering bits in the way, also the intake piping. I would be surprised if you have to remove the AC lines at all, should be able to disconnect much closer to the compressor and call it good. You may want to flush the system if you've had a leak and replace the receiver/drier as well.

[GoHashiriya]

On 5/12/2023 at 4:16 PM, joshuaho96 said:

Shrug, I would vacuum it anyways just in case but yeah most likely it has all vented out anyways. HA section of the R34 manual details how to remove it, doesn't appear to be anything crazy but it will almost certainly be annoying anyways because Nissan. Expect to remove power steering bits in the way, also the intake piping. I would be surprised if you have to remove the AC lines at all, should be able to disconnect much closer to the compressor and call it good. You may want to flush the system if you've had a leak and replace the receiver/drier as well.

Thanks for the input. Couldn't find anything regarding removing the compressor in the HA section but it seems fairly straightforward.

EDIT: got it. It's in the HA section of the Japanese manual for me, not in the english one. 

Edited May 18, 2023 by GoHashiriya
typo

[GoHashiriya]

Does anybody know what oil I can use, and the quantity for the AC system/compressor only?

The FSM says "use DH-PR for the compressor oil" other sources are saying PAG 100.

[joshuaho96]

13 hours ago, GoHashiriya said:

Does anybody know what oil I can use, and the quantity for the AC system/compressor only?

The FSM says "use DH-PR for the compressor oil" other sources are saying PAG 100.

https://ithurukaramu.lk/2020/02/14/lubricants-for-air-conditioning-and-refrigeration/

Looks like DH-PR is PAG 100. If the compressor is dry reference the underhood sticker or look up a picture of one online to figure out how much oil you need to add.

[GoHashiriya]

1 hour ago, joshuaho96 said:

https://ithurukaramu.lk/2020/02/14/lubricants-for-air-conditioning-and-refrigeration/

Looks like DH-PR is PAG 100. If the compressor is dry reference the underhood sticker or look up a picture of one online to figure out how much oil you need to add.

Thank you!