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Old 06-04-2003, 09:19 PM
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dmorrison dmorrison is offline
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Join Date: Dec 2002
Location: Colleyville, Texas
Posts: 2,695
Whoa there big fellas!!!!

I knew I would get a lot of info. Let me let you know what I have considered.

Larry
Thanks for the info and ability to borrow the vacuum pump and the "dial a charge". I think I'm going to go with the R-12. (good boy they all say, What a man, A true R12 man *G*)
I wil get the 609 license and then be ready for the 300TD and the 560SL.
But I am still thinking about the parallel flow (PF) condensor for better cooling and to save $200.
My understanding of the AC system is that the R134 freon can not be cooled suficiently in the serpintine condensor due to the design heat exchanging ability of the unit. It was not built to exchange the calories that the R134 needs. By using R12 in the PF condensor I will ensure that the R12 is completely sublimated from gas to liquid, even though it may be 110F outside. The stop and go traffic in the metroplex agrivates this by reducing the airflow over the condensor. By using the PF condensor I will help the system provide adequate liquid freon to the expansion valve therefore allowing the evaporator to have the necessary cooled freon liquid to expand. By using a larger capacity (a PF condensor) I will make the system work better.
Do you see any system problems using the PF condensor with the current 123 setup which I will be renewing?

Jcyuhn
I will look into the ability to close the fresh air vent completely. Can this be done after the dash is reinstalled or does it have to be done while I have the interiors of the car out?

GregS
The evaporator was NOT replace by the dealer. They found a leak that was small. I had them remove the R12 and I put the R134 and 134 oil in the system. Then every couple of months I was going to top off the system. So the evaporator is still leaking and will need to be replaced.
Would you still recommend a filter when everthing in the system wiill be brand new except the metal sections of the hoses, which will be flushed completely?

moraine
I will check with Tim at ackits.com. but now I have been "saved" and will go with R12.
I would still like to go with the PF condensor. Unless you guys can convince me to spend $200 more for the OEM replacement.

To all

1. A NEW compressor
2. R12 R12 R12. R134 is the devils work. Say amen. *G*
3. I will rebuilt the hoses, they are 23 years old.
4. Condensor is also 23 years old and will be replaced, the acids have been sitting in them
5. Flush Flush Flush and Flush again. Ok another amen.
6. I will look into the fresh air door modification. again If anyone has the specifics please let me know.

Well I hope I have not offended anyone.

I just bought R134 guages form Harbor Freight, I'll have to return them. I will work on the 609 license and start taking this system apart. order the necessary items ( talk to ackits and Rusty) and get moving on the project. any other words of wisdom will be great.

Now who was going to help me with the removal of the dash and center consol?????

Once I get the service CD I'll have questions I'm sure.

Dave


Ahh questions all ready

1. Tightening the fittings. Double wrenches, but to what torque? Do you actually torque them with a torque wrench or guestamate them?

2. Methods of keeping the moisture out of the system? I'm sure you use caps on all the components. Hoses, dryer (should come with caps?) compressor? evaporator etc. What methods do you seal the various parts with.

3. Applying nylog, How much and where? Orings? threads of connectors? etc.

4. Does the Service CD have an exploded view of the evaporator section. If so could someone Email it to me dwmorrison@attbi.com

thanks guys
__________________
1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car

Last edited by dmorrison; 06-05-2003 at 12:20 AM.
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