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simonf

Air con gas removal

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I will be attempting an engine removal soon and as i understand it that will envolve the removal of the air-con compresssor and consequently the gas needs to be drained.

How would i go about this?

And is it safe to do?

Your help (as every) would be greatly appreciated

SiF


REHABS FOR QUITTERS!!

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you have to have the gas taken out proffessionally, its illegal to vent to the atmosphere as its toxic. if you breath it in its very dangerous. also it is under pressue and can be dangerous.

If on the other hand its already leaking and empty of gas just unbolt it, but watch out forany liquid as I belive it is acidic.


Amateurs built the Ark

Professionals built the Titanic

"I haven't ridden in cars pulled by cows before" "Bullocks, Mr.Belcher" "No, I haven't, honestly"

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Simon I dont think you have to release the gas. Service manual EA25 (mid engine cars) Page 43 paragraph 10 "Remove A/C Compressor without disturbing pipes" :D You can just leave the A/C Compressor in the engine bay still attached to pipes

When are you planning on taking the engine out?

Edited by Buddsy

 

"Belief is the enemy of knowing" - Crrow777

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Simon

You really need to get it done professionally even if you think it might be empty. The gas settless in your lungs and will push out any oxygen but is too heavy to choke up. Nasty stuff as it's toxic as well.


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Errr....

I know.... possibly heard of someone :D who emptied the system in the garage, but just did it with loads of ventilation and didn't stick his... or errr... her.... mouth over the compressor fitting when letting the system decompress....

If you open the thread a bit at a time and listen to hear for any escaping gasses you can undo it just enough that it releases the pressure slowly in a controlled mannor and you can go have a cup of tea and let the system vent and the garage clear of any gasses so its all hunky dory when you return.....

This is..... errr.... obviously just an assumption as it was obviously not me who did it and I would not advise any unsafe practices to anyone.... :P

Simon


Chunky Lover

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Simon,

My A/C was dysfunctional prior to removing my engine, however, it was still under some pressure. The manual advises you to depressurise the system by undoing one of the connectors on the drier unit under the bonnet at the front, do it slowly and cover the area with a cloth as you do. Also the compressor has oil in it which will come out if you tip it too much (like mine did) so next time I'd plug up the hole in the compressor with something. The manual recommends simply unbolting the compressor with pipe attached, I tried and ended up swearing too much so in the end it came out with the lump.

Ambrose

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There is no need to remove the air con compressor to remove the engine - simply undo brackets and secure the compressor to one side. I have done this a number of times and my engine is currently 'out'.

If you remove plenum, alternater etc. the access is not too bad using combination spanners and long socket extentions

cheers Steve 84 turbo

Edited by 910Esprit

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Hi

Get it done professionally.It will only cost a few quid and it will save any mess.

I disconnected what I thought was an empty G car system once and there was enough pressure to cover me and half my garage ceiling with horrible smelly toxic brown liquid.Not a nice experience!!!

I didn't drink any though.

Rich

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Just to reiterate, you should be able to leave the compressor connected to the lines and just move it out of the way.

That said, if you do decide to disconnect the system, put a plastic garbage bag over the valve, seal it with tape and or rubber bands, and vent the refrigerant into the bag. If you do this, then when you unbolt the lines, you'll only get a quick puff of refrigerant -- wear safety gogggles, turn your head, and hold your breath for a moment. Oh yeah, wear safety goggles when you're venting it into the bag! lol

When the aircon system is low on refrigerant, and therefore pressure, the "low pressure switch" won't allow the system to run, but it will still have enough refrigerant with enough pressure to kill you (or make a big mess as stated above).

If you DO vent the system and disconnect the lines, you need to immediately seal all of the lines while it is disconnected so you don't get moisture from the air into the system, and also possibly ruin the receiver/dryer. And when you bolt the system back together, you will have to vacuum pump it to remove all contaminants (such as air) and test that it holds 29 inches of mercury (measurement unit of vacuum). Then you will have to add oil and refrigerant back into the system.

So, leave the lines connected. AC work is not scary and anyone with a little patience, money, and brains can do it, but why go through all that when you can leave the compressor connected?

- T


Tony K. :)

 

Esprit S1s #355H & 454H

Esprit S2.2  #324J

1991 Esprit SE

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Cheers guys!

I will try to remove the engine without taking the compressors out - but if i have to remove the compressor does anybody know a local company that can remove the refrigerant and will they come out to me as the car will by then be VERY off the road!

Thanks to all the guys who have given me advice on how to do it myself - however if/when you get to meet me you will know why it is better for me to get a professional in (please see my signature-below!! :) )


REHABS FOR QUITTERS!!

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Crumbs...

I never thought it could have been so dangerous ...

I'd be interested to know whether your pipes are in the same state as mine, they look like some rodent has been munching on them in half a dozen places. I suppose I'll have to replace them but Im trying not to think about that at the moment given the likely destruction involved. Check out your oil lines too, one of mine was almost through so Im looking into braided replacements.

Ambrose

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Yep my pipes were very ratty - evidenced by a giant leak when trying to pressurise the system.

The good news is that a local hose specialist made me a replacement pipe (reusing old fittings) Abolsute ball-ache to install but it is possible. I still have one original pipe that looks bad, but it has not exploded yet!

The even more good news that the aircon worked a treat after this even though it was presumably very contaminated and 'moist'

I am still waiting to see a thread on this forum about DIY R12 replacement gas and kits - seem to work well, but concerns about long term damage to system....

cheers Steve 84 turbo

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