Quote:
Originally Posted by TheDon
Would anyone know of I can swap in a 603 timing gear in place of the 606 timing gear so I can run. 603 vacuum pump? The 606 pump is slightly different a. Doesn't have the second nipple like the 603. I haven't looked to see what it's for other than on the 603 is to provide vacuum to the EGR stuff and one other thing.
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Just run your vacuum needs off of the small nipple on the brake booster line. Simply add a reducer in there for the vacuum consumers normally fed by the small nipple on the pump. This is also the source for the injection shut-off circuit, so make sure that maintains full vacuum strength.
