A/C time ...how to handle refridgerant
06-10-2018 | 09:40 AM
#46
Thread Starter
Drifting
After watching a video on rebuilding hoses, I discovered it’s not just a crimp; there’s a part brazed or soldered on first, meaning the purchase of not only a $$ crimping tool but a special torch and fittings......
I’ll look for a place to rebuild as you suggest. Or maybe the aliens can do it.....
Say, in Post #11, there is a dealer machine method that includes flushing the system. It’s not mentioned that the TEV (and the dash) is removed. Did dealers improperly flush systems? Or, did they in fact remove dashboards and end up charging major $$ for a flush & fill?
I also looked back and remembered that I can use the vacuum to check for more leaks after replacing the hose. If I find a cheap way to restore my hose, the money saved could buy that vacuum......
I’ll look for a place to rebuild as you suggest. Or maybe the aliens can do it.....
Say, in Post #11, there is a dealer machine method that includes flushing the system. It’s not mentioned that the TEV (and the dash) is removed. Did dealers improperly flush systems? Or, did they in fact remove dashboards and end up charging major $$ for a flush & fill?
I also looked back and remembered that I can use the vacuum to check for more leaks after replacing the hose. If I find a cheap way to restore my hose, the money saved could buy that vacuum......
06-10-2018 | 10:25 AM
#47
Rainman
Rennlist Member
Rennlist Member
06-11-2018 | 12:41 PM
#51
Thread Starter
Drifting
06-11-2018 | 07:23 PM
#52
Rainman
Rennlist Member
Rennlist Member
you're what, 3 hours from Detroit, there's got to be 100,000 AC hose shops around, lol
06-11-2018 | 11:40 PM
#53
Thread Starter
Drifting
Found a place near my work... looked pretty shady but, oh well.... dropped it off on my way home and they called me shortly after that it’s done. $70CAD (about 50USD). Can’t wait to see this quality work........
06-12-2018 | 06:20 PM
#56
Rainman
Rennlist Member
Rennlist Member
Nice stuff...FYI specs:
https://www.burgaflex.com/products/
click on 3090 Reduced Barrier Hose...your hose there has a working pressure of 35 bar
high side on 944 AC system *might* see 20 bar on a really hot day.
https://www.burgaflex.com/products/
click on 3090 Reduced Barrier Hose...your hose there has a working pressure of 35 bar
high side on 944 AC system *might* see 20 bar on a really hot day.
06-12-2018 | 08:44 PM
#57
My new AC hose looks pretty much identical, much thinner that the original one and it's been working fine for 2 years now. I think it is called technical advance 
On a side note - long time ago I flushed the AC system with either brake cleaner or some sort of purified gasoline without removing the TXV valve. I just didn't know it should be removed... I just poured some of the liquid into the hose and pushed it through with compressed air until dirty crap came out. I repeated this process until clear liquid started to come out. Then replaced all orings, blown hose, receiver/drier and rebuild compressor with R134A kit. Shop filled it in with oil and gas and it's been working fine since then. I'm not trying to encourage anybody to do it that way, just saying it worked for me. On the other hand TXV restricts the flow of liquid, it doesn't stop it.
On a side note - long time ago I flushed the AC system with either brake cleaner or some sort of purified gasoline without removing the TXV valve. I just didn't know it should be removed... I just poured some of the liquid into the hose and pushed it through with compressed air until dirty crap came out. I repeated this process until clear liquid started to come out. Then replaced all orings, blown hose, receiver/drier and rebuild compressor with R134A kit. Shop filled it in with oil and gas and it's been working fine since then. I'm not trying to encourage anybody to do it that way, just saying it worked for me. On the other hand TXV restricts the flow of liquid, it doesn't stop it.
06-13-2018 | 06:33 PM
#58
Thread Starter
Drifting
Hose looks good then.. super! Will put back on the weekend.
I ordered an AC o-ring kit from Amazon; I’m hoping it will suffice. When changing o-rings in the system, I guess that means under the dash too (evaporator / TXV connections)? I am seriously hoping all that in-dash stuff has been dealt with that time I had evaporator changed.
I have a new drier sourced locally for cheap. Vacuum leak test should direct me next.
Getting humid these days
I ordered an AC o-ring kit from Amazon; I’m hoping it will suffice. When changing o-rings in the system, I guess that means under the dash too (evaporator / TXV connections)? I am seriously hoping all that in-dash stuff has been dealt with that time I had evaporator changed.
I have a new drier sourced locally for cheap. Vacuum leak test should direct me next.
Getting humid these days
06-14-2018 | 03:11 PM
#59
Thread Starter
Drifting
My HVAC buddy at work says put the hose back and bring the car in; he will test for leaks by using Nitrogen and pressurizing to 300psi. Sounds a bit harsh! He says you can't reliably test for leaks with a vacuum?
The Nitrogen sounds legit so maybe I'll have him do this and pump a little less psi like 150 or so...
The Nitrogen sounds legit so maybe I'll have him do this and pump a little less psi like 150 or so...
