Switchover Valve Cleaned! Presto!! - PeachParts Mercedes-Benz Forum

tobybul · #1 04-03-2007, 06:21 PM

Today, I read Steve Brotherton's article on Transmission Fine Tuning from the DIY Articles above. In the later part, he talked about how the banjo and the switchover valve get dirty. I have been into the banjo's at least twice in the past but not on the switchover valve.

I don't know why I didn't look into this sooner but I finally removed and cleaned the switchover valve of the 85D and to my amazement, picked up some power

.

Sorry I did not think about taking pics

but all I did was unfastened the valve from the fire wall and unhooked the 2 boost lines and the electrical plug. Got some brake cleaner spray and sprayed the inside of the boost connections. It seemed more effective spraying thru the bottom connection as it pushed the gunk out thru the side connection (not sure what the top connection with the cap is for).

There was black stuff (soot) that came out just like Steve said. I sprayed it till the cleaner came out clear. I used brake cleaner b/c it dries quick. Also had the jet straw attached to the spray

Thoroughly dried valve with some compressed air and put it back. I also readjusted the ALDA back to its original position (I had it 1/2 turn CCW). Test drove the car and I swear, it was as if the ALDA was turned up.

Don't know if this will work for anyone else but I had this sluggish pickup since I got the car last year. Dirty switchover valve appears to have been the cause.