Question for the R4 compressor experts - Page 4 - PeachParts Mercedes-Benz Forum

otto huber · #46 02-26-2016, 07:46 PM

[QUOTE=funola;3574592]Don't know if these pics helps. I took them before taking apart my parts compressors to get the outer band to make a R4 press and also for future identification if there is a a future need before throwing the guts out.

Don't know if it means anything but the Delphi has the same SAE number as your Harrison.

Thanks for the pics. I guess that the SAE # has nothing to do with sealing washer size, because my old compressor was also a Delphi with the same port sizes as the one you posted. I misstated the brand of the old compressor in my first post, I thought that it was Behr.

Fortunately, it looks like I found the washer that I need. The O'reilly's near me has a good store manager, and he opened up some kits for me and found a black washer with the same inner and outer diameter as the red washer but thinner. The black washer fits into both ports. I'm waiting on a new drier, so I'm hoping to have everything sealed up by the end of next week and get a leak test in mid March.

otto huber · #47 02-27-2016, 12:00 PM

I've been using Castrol 15-40 Diesel motor oil for the past two years and have concluded that Castrol is by far the best motor oil for the 617 engine!

leathermang · #48 02-27-2016, 12:18 PM

Otto, Well, that is certainly the definitive test... thanks for reporting it... that will shut down the need for any more oil discussions ....
I always used Castrol in my motorcycles....and I found out that the local Toyota dealer used that when changing oil on customer's cars... decades ago...our Toyota's were amazing for longevity.... 300k miles plus on a four cylinder gas engine... super...

otto huber · #49 02-27-2016, 03:53 PM

Quote:

Originally Posted by leathermang

Otto, Well, that is certainly the definitive test... thanks for reporting it... that will shut down the need for any more oil discussions ....
I always used Castrol in my motorcycles....and I found out that the local Toyota dealer used that when changing oil on customer's cars... decades ago...our Toyota's were amazing for longevity.... 300k miles plus on a four cylinder gas engine... super...

I used the nuclear option to re-hijack my hijacked thread. I'm fine with people discussing whatever. I received some good answers and found suitable washers. For people doing a search on AC in the future, this thread might be a little difficult to sort through.

vstech · #50 02-27-2016, 07:44 PM

Quote:

Originally Posted by otto huber

I used the nuclear option to re-hijack my hijacked thread. I'm fine with people discussing whatever. I received some good answers and found suitable washers. For people doing a search on AC in the future, this thread might be a little difficult to sort through.

nah, I'll move the coil conversation to the ac thread to better focus on the original topic.

glad you got hooked up!

leathermang · #51 02-27-2016, 07:52 PM

Vstech, I agree on the evap description and relative to the change to 134a situation... was not addressing that.... One reason that MB warned against using the 'site gauge' back when we had them was that the correct test conditions were almost impossible .. except in a MB dealership to test and not leave the possibility of bubbles EVEN WHEN THE SYSTEM WAS FULLY CHARGED.... which allowed the possibility of Over filling by someone... .... but on the moving the evap part.. we had to have something to do while we waited for things like the good picture of the compressor.... etc...

funola · #52 06-23-2016, 10:27 AM

[QUOTE=otto huber;3574603]

Quote:

Originally Posted by funola

Don't know if these pics helps. I took them before taking apart my parts compressors to get the outer band to make a R4 press and also for future identification if there is a a future need before throwing the guts out.

Don't know if it means anything but the Delphi has the same SAE number as your Harrison.

Thanks for the pics. I guess that the SAE # has nothing to do with sealing washer size, because my old compressor was also a Delphi with the same port sizes as the one you posted. I misstated the brand of the old compressor in my first post, I thought that it was Behr.

Fortunately, it looks like I found the washer that I need. The O'reilly's near me has a good store manager, and he opened up some kits for me and found a black washer with the same inner and outer diameter as the red washer but thinner. The black washer fits into both ports. I'm waiting on a new drier, so I'm hoping to have everything sealed up by the end of next week and get a leak test in mid March.

How did the R4 work out? I see in your first post you bought a shaft seal kit. Did you take apart the R4 and do a full re-seal? It is not hard if you have the tool to press out the casing. I made a tool out of an old R4 in a couple of hours and tested it- Looks 3rd world but works great! I plan on re-sealing the R4 in my 85 300D, renew all o-rings on the fittings, flush system, replace TXV and dryer, pressure test and refill with R12. I have a full 30 lb jug of R12 sitting around waiting to be put to use. I currently is testing R152a DustOff and it is cooling great. I will continue testing the R152a well into Aug- Sept when it will be much hotter and then go back to R12 in Sept when it is still hot. Meanwhile have to gather/order parts.

Couple of good videos on R4 resealing:
https://www.youtube.com/watch?v=vImsu-D_Qnk

https://www.youtube.com/watch?v=1zZyeEgDdyY

seal kits:

GM R4 AC Compressor Gasket Shaft Seal Kit Green HNBR Metal Shaft Seal Tool | eBay

GM R4 A C Compressor Reseal Kit with Shaft Seal O Rings and Seal Install Tool | eBay

otto huber · #53 06-23-2016, 11:38 AM

The Harrison R4 has worked well and the two sealing washers that I found for the back of the compressor seem to be doing the job. I drove the car down to Southern California last weekend and was able to get vent temps down to 39* with 85* ambient temp.

ROLLGUY · #54 06-23-2016, 05:42 PM

Quote:

Originally Posted by otto huber

The Harrison R4 has worked well and the two sealing washers that I found for the back of the compressor seem to be doing the job. I drove the car down to Southern California last weekend and was able to get vent temps down to 39* with 85* ambient temp.

You should have stopped by to say hi!

otto huber · #55 06-23-2016, 07:41 PM

Quote:

Originally Posted by ROLLGUY

You should have stopped by to say hi!

Where exactly are you located? My girlfriend and I were down near Pismo beach for just one evening, so not much time to make visits, but maybe you were at the classic car show that weekend.