<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
When do you need to access high side? Probably none :-)
<p>Jim Caldwell wrote:
<blockquote TYPE=CITE>I' m doing a conversion to R134, as the system lost
its charge. It is an 85
<br>Mercedes 300SD. Lo side adapter fits fine, but the hi side adapter
<br>not. The hi side valve is right between the left headlight and the
<br>condenser and fan. I have a std aluminum hi side adapter for R134
<br>quick-disconnect. The valve on the car is narrower at it front end
<br>wide enough for about six threads), but this front part has NO
<br>They were'nt stripped off, they were never there. It is 90 MM wide.
<br>part of the valve (which is 110 MM on the outside of the threads) IS
<br>threaded. Problem is, that there needs to be threads on the narrower
<br>part of the valve, not on the rear part to work with this adapter.
<br> As it is, you can "screw" it on, but it is not really engaging
<br>so you cannot tighten it up and make a good o-ring seal. The adapter
<br>threads cut on its narrower inner ID where the o-ring seats, but the
<br>part towards the outside of the fitting has NO threads.
IE, the thread
<br>location is backwards.
<br>( Would take 5 seconds to SHOW someone the problem, but is much harder
<br> Do I need to get some special adapter at the Mercedes