Hi all-
I recently acquired a 1987 300TD wagon with 190,000 miles. It accelerates sluggishly from a stop, but the turbo works great at higher rpm/speed. 0-60 time is 14 s. I cleaned out the pressure line from the intake and verified there is a pathway for pressure to the ALDA. Not surprisingly, vehicle performance didn't change. I have disabled the EGR and ARV (temporarily, of course), and any improvement of the accel was mild if at all. 0 to 60 time is still 14s.

I applied pressure to the ALDA and it leaks. Specifically it leaks at about 1 psi per second. I pump it to 12 psi, and it leaks down at that rate. In searching the archives, it appears that many years ago, this leakage rate was considered acceptable and not worth fixing. Is that still the consensus?

The ALDA screw is intact, but I don't know yet if it has already been shimmed. Pulling the ALDA will clearly be a next step. But if I am pulling the ALDA off to shim it, I am trying to see if I should address the leakage at the same time. If it is worthy of fixing, what is the best approach? Used ALDA's on ebay are ~$70.

As an aside, elsewhere someone recommends using a ADA washer on the ALDA (part 007603014405). Has anyone tried that part?

Many thanks.

Andrew

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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).