egr

  1. MeldrewsMate

    Vauxhall combo 1.3cdti - what's the EGR valve for, and where is it!

    I think the title says it all. My van has a definite diesel knock which tends get quieter as it warms up. That or I get more deaf! The knock is typical of that which all diesel engines used to have before about 1990. Does the EGR valve affect the diesel knock? If so, in what way? Where is the...
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