I am going to attempt to change my ac compressor on my 1992 w140 300se.
Can I just undo the connections or is it pressurized and need special tools? also the compressor I am getting from the States comes with no oil. Do I need to fill it before install or can I install and then get it filled and gassed later as long as I don't turn it on. In other words can I just connect it and then drive it to get it gassed etc???
New tried this sort before so sorry if its a dumb question.....
Cheers
Greg
changing ac compressor
- pina4greg
- E Class
- Posts: 59
- Joined: Tue 09 May, 2017 11:53 pm
- Model you own: w140
- Region: Western Australia
- Location: Eglinton
changing ac compressor
1992 W140 300se
- Tony From West Oz
- OZBENZ moderator
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- Joined: Mon 20 Jun, 2005 9:04 pm
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- Region: Victoria
- Location: Bedfordale WA
Re: changing ac compressor
When I changed mine I didn't turn the A/C on until it was gassed up.
If it is not filled with oil, then don't run it until lubed and gassed.
If it is not filled with oil, then don't run it until lubed and gassed.
Life is a journey, with problems to solve, lessons to learn, but most of all, experiences to enjoy.
'83 W123 300D 325000km (Wife's car Josephine - sold).
'84 W123 300D replaced good OM617 912 with OM617 952 and enjoyed having good acceleration for the first time since first driving a 300D in 2002
'86 W124 300D sold
'85 W123 300CD, 275 000km (Fatmobile) rebuilt turbodiesel transplanted into 280CE (SOLD)
'99 W202 C250 Turbodiesel
'98 W202 C250 Turbodiesel
'06 Ssanyong Musso Crew Cab 2WD Ute (OM662 diesel and Auto Transmission)
'00 Ford Courier Crew Cab 2.5TD
'06 Ssanyong Musso Crew Cab 4WD Ute (OM662 diesel and Auto Transmission)
'04 Ssanyong Musso Crew Cab 4WD Tray back Ute (OM662 diesel and Auto Transmission)
'83 W123 300D 325000km (Wife's car Josephine - sold).
'84 W123 300D replaced good OM617 912 with OM617 952 and enjoyed having good acceleration for the first time since first driving a 300D in 2002
'86 W124 300D sold
'85 W123 300CD, 275 000km (Fatmobile) rebuilt turbodiesel transplanted into 280CE (SOLD)
'99 W202 C250 Turbodiesel
'98 W202 C250 Turbodiesel
'06 Ssanyong Musso Crew Cab 2WD Ute (OM662 diesel and Auto Transmission)
'00 Ford Courier Crew Cab 2.5TD
'06 Ssanyong Musso Crew Cab 4WD Ute (OM662 diesel and Auto Transmission)
'04 Ssanyong Musso Crew Cab 4WD Tray back Ute (OM662 diesel and Auto Transmission)
-
- Mercedes Demigod
- Posts: 6306
- Joined: Sat 12 May, 2007 2:21 pm
- Model you own: I own multiple different models
- Region: Victoria
- Location: Melbourne
Re: changing ac compressor
There will be a schrader valve on the high side piping.
Just give the little pin in the valve a gentle push - if there's any gas in there you will know.
If there is gas in there, go down to your local AC fill-up place and have all the current gas vacuumed out. They'll vaccum out the ester oil as well.
When it comes to fill up they will add oil and a trace colour (colour to detect leaks).
When you have the system apart, get all the old seals and take them to your AC guy. get new seals of him - he may charge you nothing for these as you will go back to get the gas reinstalled. There will be two seals on the compressor and one each on the high and low pressure lines.
You should be renewing the drier - the new one should comes with seals.
I remove the high pressure hose pipe first when the car is sitting on the ground. In your case the drier hoses as well.
Remove the serpentine belt. This may require removing the fan shroud which in turn may require removal of the fan blades.
Then lift the car and remove the engine cover.
Your compressor should be a four bolt model - maybe a three bolt. There may not be enough room to remove the bolts from the compressor. undo the bolts and let them loose.
The compressor should come out. The compressor on my W202 came out from the bottom. The compressor on the W210 came out the top.
Reinstall is reversal of the process.
When installing the seals make sure you lube them with a little bit of ester oil.
Just give the little pin in the valve a gentle push - if there's any gas in there you will know.
If there is gas in there, go down to your local AC fill-up place and have all the current gas vacuumed out. They'll vaccum out the ester oil as well.
When it comes to fill up they will add oil and a trace colour (colour to detect leaks).
When you have the system apart, get all the old seals and take them to your AC guy. get new seals of him - he may charge you nothing for these as you will go back to get the gas reinstalled. There will be two seals on the compressor and one each on the high and low pressure lines.
You should be renewing the drier - the new one should comes with seals.
I remove the high pressure hose pipe first when the car is sitting on the ground. In your case the drier hoses as well.
Remove the serpentine belt. This may require removing the fan shroud which in turn may require removal of the fan blades.
Then lift the car and remove the engine cover.
Your compressor should be a four bolt model - maybe a three bolt. There may not be enough room to remove the bolts from the compressor. undo the bolts and let them loose.
The compressor should come out. The compressor on my W202 came out from the bottom. The compressor on the W210 came out the top.
Reinstall is reversal of the process.
When installing the seals make sure you lube them with a little bit of ester oil.
Current
S212 - E350 Wagon
W213 - E220d
Departed
W211 - E240
W204 - C280
W202 - C200, C180, C180
W126 - 380SE , 380SE (Ex SA Import), 560SEL
W124 - 300e, 260e (ex Japan)
W111 220s (Indonesia) 4 speed manual column shift
W123 230
W116 450SEL
W140 420SEL
W210 E240, E240
W209 CLK 240
W201 190e 2.6 (ex U.K.)
S212 - E350 Wagon
W213 - E220d
Departed
W211 - E240
W204 - C280
W202 - C200, C180, C180
W126 - 380SE , 380SE (Ex SA Import), 560SEL
W124 - 300e, 260e (ex Japan)
W111 220s (Indonesia) 4 speed manual column shift
W123 230
W116 450SEL
W140 420SEL
W210 E240, E240
W209 CLK 240
W201 190e 2.6 (ex U.K.)
- pina4greg
- E Class
- Posts: 59
- Joined: Tue 09 May, 2017 11:53 pm
- Model you own: w140
- Region: Western Australia
- Location: Eglinton
Re: changing ac compressor
Thanks guys, I did supply my vin to Pelican Parts to make sure I got the correct compressor so "should" fit...
Will follow the advice. So the car is safe to drive with the new compressor installed without oil or refrigerant in it as long as I dont turn the ac on?
Will follow the advice. So the car is safe to drive with the new compressor installed without oil or refrigerant in it as long as I dont turn the ac on?
1992 W140 300se
-
- Mercedes Demigod
- Posts: 6306
- Joined: Sat 12 May, 2007 2:21 pm
- Model you own: I own multiple different models
- Region: Victoria
- Location: Melbourne
Re: changing ac compressor
The drier has a little pressure switch on the top. (you will need to relocate this switch to your new drier).
If there is no gas in the system or too little gas the detector switch on the drier wont let the electric clutch on the compressor to activate.
You can push the EC button or AC button on the controller until the cows come home - but the compressor will not start.
Plenty of cars running around with no gas in the AC system.
If there is no gas in the system or too little gas the detector switch on the drier wont let the electric clutch on the compressor to activate.
You can push the EC button or AC button on the controller until the cows come home - but the compressor will not start.
Plenty of cars running around with no gas in the AC system.
Current
S212 - E350 Wagon
W213 - E220d
Departed
W211 - E240
W204 - C280
W202 - C200, C180, C180
W126 - 380SE , 380SE (Ex SA Import), 560SEL
W124 - 300e, 260e (ex Japan)
W111 220s (Indonesia) 4 speed manual column shift
W123 230
W116 450SEL
W140 420SEL
W210 E240, E240
W209 CLK 240
W201 190e 2.6 (ex U.K.)
S212 - E350 Wagon
W213 - E220d
Departed
W211 - E240
W204 - C280
W202 - C200, C180, C180
W126 - 380SE , 380SE (Ex SA Import), 560SEL
W124 - 300e, 260e (ex Japan)
W111 220s (Indonesia) 4 speed manual column shift
W123 230
W116 450SEL
W140 420SEL
W210 E240, E240
W209 CLK 240
W201 190e 2.6 (ex U.K.)
- pina4greg
- E Class
- Posts: 59
- Joined: Tue 09 May, 2017 11:53 pm
- Model you own: w140
- Region: Western Australia
- Location: Eglinton
Re: changing ac compressor
I will need to jack up the front of the car to access the compressor and will need jack stands.
Where is the best place to place them under the car?
Obviously will be using the jack position on the car to lift it.
Cheers
Greg
Where is the best place to place them under the car?
Obviously will be using the jack position on the car to lift it.
Cheers
Greg
1992 W140 300se
- Tony From West Oz
- OZBENZ moderator
- Posts: 3252
- Joined: Mon 20 Jun, 2005 9:04 pm
- Model you own: I own multiple different models
- Region: Victoria
- Location: Bedfordale WA
Re: changing ac compressor
Use the supplied jack to lift the car using the jacking holes in the rocker panels. Add car stands under the body just inboard of the jacking points. Usually there will be a rubber block on the rail at that point.
Life is a journey, with problems to solve, lessons to learn, but most of all, experiences to enjoy.
'83 W123 300D 325000km (Wife's car Josephine - sold).
'84 W123 300D replaced good OM617 912 with OM617 952 and enjoyed having good acceleration for the first time since first driving a 300D in 2002
'86 W124 300D sold
'85 W123 300CD, 275 000km (Fatmobile) rebuilt turbodiesel transplanted into 280CE (SOLD)
'99 W202 C250 Turbodiesel
'98 W202 C250 Turbodiesel
'06 Ssanyong Musso Crew Cab 2WD Ute (OM662 diesel and Auto Transmission)
'00 Ford Courier Crew Cab 2.5TD
'06 Ssanyong Musso Crew Cab 4WD Ute (OM662 diesel and Auto Transmission)
'04 Ssanyong Musso Crew Cab 4WD Tray back Ute (OM662 diesel and Auto Transmission)
'83 W123 300D 325000km (Wife's car Josephine - sold).
'84 W123 300D replaced good OM617 912 with OM617 952 and enjoyed having good acceleration for the first time since first driving a 300D in 2002
'86 W124 300D sold
'85 W123 300CD, 275 000km (Fatmobile) rebuilt turbodiesel transplanted into 280CE (SOLD)
'99 W202 C250 Turbodiesel
'98 W202 C250 Turbodiesel
'06 Ssanyong Musso Crew Cab 2WD Ute (OM662 diesel and Auto Transmission)
'00 Ford Courier Crew Cab 2.5TD
'06 Ssanyong Musso Crew Cab 4WD Ute (OM662 diesel and Auto Transmission)
'04 Ssanyong Musso Crew Cab 4WD Tray back Ute (OM662 diesel and Auto Transmission)