Evaporator flushing w/o removing..... - Page 2 - PeachParts Mercedes-Benz Forum

leathermang · #16 05-19-2006, 04:35 PM

The suggestion about taking the insides out of the old expansion valve and using it for a fitting for the flushing is directly from the MB Factory Air Conditioning manual....
I don't understand why people try to find things other than flushing fluid to flush with. It might be formulated to work well as a flush agent.

jbaj007 · #17 05-19-2006, 04:48 PM

Ah yes.. That's the ticket! Hecat flush gun.

http://www.ackits.com/hecat/flushgun.wmv

Pete Burton · #18 05-19-2006, 05:00 PM

Quote:

Originally Posted by MarkM

I assume if you are flushing the system and doing general repairs and upgrades, that you will be replacing the expansion valve (you should do this). Do not throw the old one away....secure it in a vise and use an electric drill with a 1/4 or 3/8 inch bit and drill out the insides of each side. Then blow out all the chips. Now re-install this in its normal place, and you will now be able to flush the evap. from the engine compartment using the ends of the two hoses, and you will clean the hoses as well. Also, this method makes it easy to forward and reverse flush.

Good Luck,

Mark

I'm all for making a tool out of anything that would otherwise be thrown away. I have a good # of such tools myself!

Hit Man X · #19 05-19-2006, 07:00 PM

Quote:

Originally Posted by MarkM

I assume if you are flushing the system and doing general repairs and upgrades, that you will be replacing the expansion valve (you should do this). Do not throw the old one away....secure it in a vise and use an electric drill with a 1/4 or 3/8 inch bit and drill out the insides of each side. Then blow out all the chips. Now re-install this in its normal place, and you will now be able to flush the evap. from the engine compartment using the ends of the two hoses, and you will clean the hoses as well. Also, this method makes it easy to forward and reverse flush.

Good Luck,

Mark

Sounds like a good idea as my SD is getting a hardcore flush next week. Is there a PDF I can read on this issue?