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I need to remove one of the metal air con pipe on our mk2 ZR to get access to the exhaust manifold, the system has lost enough gas for it to not switch on anymore [over a year ago] I KNOW its not recommended but in the real world I am sure people have undone these pipes at home on various cars and not had the system vacuumed of refridgerant before doing so. I aim to undo a small bolt that holds the pipe [in red circle below] very slowly.  tool will be operated at arms length, gloves will be worn, eyes covered, no flames. I don't intend re-gassing, did that a couple of years back when I got the car and it lost its pressure so theres a fault somewhere/curse word seal, I just class the car as not having air con now. thoughts please... |
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Undo quick, hold breath, walk away and make a brew....
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if its already lost its gas, you will more than likely only get oil and leak detector fluid come out. if there is any gas left in the system, so long as you are out side and not in a garage, then it will vent. alternatively, take the plastic cap off the other end of the pipe, and press the valve center, that will vent the remaining gas if any of it is there. This is of course a non environmentally friendly way of doing this, although the gas is more than likely the later "safer" gas and not the nasty old stuff.  |
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'88 Cadillac Brougham hearse (white)
'91 Carlton GSi 24v
'72 Dodge dual cab pick up
'99 Mercedes S55 AMG
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thanks, I thought it would be ok.
I doubt it has leak detector stuff in it, I have looked much of the system over [what I can see of it], and cant see any signs of a leak anywhere, otherwise I may have sorted it then have it regassed again to have a working system.
I will be working on it in the great outdoors.
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out of curiosity, doing a head gasket are we? Oh and is it the VVT version? As i recently converted a Caterham to this set up from one of these rovers, hence knowing about the gas venting  |
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'88 Cadillac Brougham hearse (white)
'91 Carlton GSi 24v
'72 Dodge dual cab pick up
'99 Mercedes S55 AMG
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out of curiosity, doing a head gasket are we? Oh and is it the VVT version? As i recently converted a Caterham to this set up from one of these rovers, hence knowing about the gas venting yes I am doing a head gasket, its a 1.4 so no VVT stuff on it |
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Hi, to see the leak detector fluid you need an ultra violet light. The way to spot a leak without the UV light is to look for an oily damp patch (yes, I know) usually on the condenser (the rad in front of the main water rad). If you are thinking of having it regassed and you do open up any joints then tape them up to stop the damp air getting in.
Colin
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Feb 10, 2015 15:12:27 GMT
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out of curiosity, doing a head gasket are we? Oh and is it the VVT version? As i recently converted a Caterham to this set up from one of these rovers, hence knowing about the gas venting yes I am doing a head gasket, its a 1.4 so no VVT stuff on it ah ,easy job then! Make sure you get the head skimmed and the newer multi layered headgasket and head bolts Oh and a new expansion tank cap! i have around 50 to 60 of these head gaskets behind me now and those are the main things to replace and do. Good luck ! |
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'88 Cadillac Brougham hearse (white)
'91 Carlton GSi 24v
'72 Dodge dual cab pick up
'99 Mercedes S55 AMG
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Feb 10, 2015 17:31:43 GMT
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I have a BG MLS Head Gasket set and new bolts ready to install, the engine hasnt overheated so unless the head isnt flat, or there are indentations, then I might not be having it skimmed.
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Feb 10, 2015 18:11:17 GMT
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I have a BG MLS Head Gasket set and new bolts ready to install, the engine hasnt overheated so unless the head isnt flat, or there are indentations, then I might not be having it skimmed. I always had them skimmed, even if the customer complained as i didnt want to have to do it again on the same car, well freelanders mainly. The least that came off of one was 0.005mm the most was 0.30mm, its just a matter of knowing it was flat rather than hoping it was. As doing the same job twice on a car within a year was something i wasnt gunna do. It was always worth the extra £50 to have that knowledge that it was flat. The most recent one was the head swap, it hadnt overheated or gone, however it did have 0.011 taken off of it to get it flat. |
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'88 Cadillac Brougham hearse (white)
'91 Carlton GSi 24v
'72 Dodge dual cab pick up
'99 Mercedes S55 AMG
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You're like a crazy backyard genius! |
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Feb 11, 2015 18:47:33 GMT
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In my experience, liners don't drop (perhaps I'm lucky in that respect)All were the 1.8 derivative as well, so i cant comment about liners in the smaller engines. The MLS gasket is more resilient and seals better than the old one with orange rubbery seals around the bits that need sealing from my experience As for the the skimming, unless you have some awesome eyesight, or a perfectly flat engineering block to hand, you will never see a slight distortion in the head, and if you put even a slightly distorted head back on, irrespective of the gasket being used, it will go sooner rather than later. Thats ok if you are getting shot of the car asap, but as i was doing mine for customers, i didnt want to see it back again before the cars next service with another failed gasket. Also for the sake of adding £50 to the bill for the skim at cost, thats worth the piece of mind in my book, as the customers also appreciate that you are going a little bit further to assist them in keeping the engine going for longer. I like to cover my butt on these things From all of the ones i have done, all but about 3, were all in freelanders spanning the build range from 97 to 02. The others were in MGs and a Caterham, these were results of rad cap failure and one was a head swap for a VVT head. All were the 1.8 derivative as well, so i cant comment about liners in the smaller engines. At the end of the day, I'm just glad i don't deal with them that often now  |
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'88 Cadillac Brougham hearse (white)
'91 Carlton GSi 24v
'72 Dodge dual cab pick up
'99 Mercedes S55 AMG
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Feb 11, 2015 21:08:41 GMT
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I just like to stick to the Rover L series diesel  |
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You're like a crazy backyard genius!
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Feb 15, 2015 13:32:26 GMT
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I undone the pie at that union and nothing appeared to happen, gave it a wiggle and it was loose. So I pressed in the valve on the low pressure pipe [this pipe I am working on] and nothing, so I then pressed in the valve on the high pressure side and there was just a teeny weeny Ss and that was it, the breath of a mouse in volume So all is ok, and the atmosphere is still mostly there. |
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