mfg Posted August 23, 2014 Report Share Posted August 23, 2014 What engine problem do 304.5 CI R3 and R4 Studebaker V8's have in common with the earlier 320, 352, and 374 CI Packard V8 engines? Link to comment Share on other sites More sharing options...
Avanti83 Posted August 23, 2014 Report Share Posted August 23, 2014 oil pump? Link to comment Share on other sites More sharing options...
brad Posted August 23, 2014 Report Share Posted August 23, 2014 piston wrist pins scoring the cylinder walls Link to comment Share on other sites More sharing options...
mfg Posted August 23, 2014 Author Report Share Posted August 23, 2014 It wouldn't be the wrist pins, because the Packards didn't have that problem....but Avanti83's 'oil pump' comment hit the nail on the head. In common with the Packard V8, the R3-R4 oil pumps had a design flaw that could also cause oiling problems. Link to comment Share on other sites More sharing options...
brad Posted August 24, 2014 Report Share Posted August 24, 2014 Where do you get that idea? The R3 pumps were identical to regular Studebaker oil pumps, except the housing and gears were 1/4" longer. Link to comment Share on other sites More sharing options...
mfg Posted August 24, 2014 Author Report Share Posted August 24, 2014 In at least six cases with these engines, the pin that holds the oil pump idler gear worked loose raising havoc inside the R3-4 pumps. NOT a good thing to happen at 6000 RPM...or even at idle! Studebaker (Granatellis?) should have redesigned the housing for the longer gears...but that of course would have taken more time and $$$$$! Link to comment Share on other sites More sharing options...
64Avanti Posted September 2, 2014 Report Share Posted September 2, 2014 The pump housing was redesigned for the longer gears by Studebaker. Please explain. Link to comment Share on other sites More sharing options...
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