Quote:
Originally Posted by sixto
You can cover the hole left by the ALDA but there's no need to other than to keep it clean in case you want to put back the ALDA. You can refit the ALDA with a couple of oil drain plug washers or whatever fits between the IP and ALDA which is practically disabling the ALDA.
Sixto
87 300D
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Most ALDA's have between .05 and 1.0mm of shims, in stock condition, which generally equates to one or two shims, at least in all the ones that I have seen in the many teardowns I have done personally. I usually shim the ALDA a full 3.0mm and then adjust to give the best acceleration on a stopwatch.
I have found all kinds of boost leaks on these cars. The most common is the O rings on the turbo inlet adapter, second would be the line going to the ALDA/Overboost Solenoid and third the intake gasket itself!!!!
I had one that would 'bubble' through the two halves of the intake gasket, even after replacement. Granted, this is a small loss, but it is a loss nonetheless. I coated the replacement with "The Right Stuff" which seemed to correct the problem.
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 Did you just pass my 740 at 200 kmh in a 300SD?????
1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013
100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership 
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