mfg Posted August 23, 2014 Report 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?
brad Posted August 23, 2014 Report Posted August 23, 2014 piston wrist pins scoring the cylinder walls
mfg Posted August 23, 2014 Author Report 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.
brad Posted August 24, 2014 Report 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.
mfg Posted August 24, 2014 Author Report 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 $$$$$!
64Avanti Posted September 2, 2014 Report Posted September 2, 2014 The pump housing was redesigned for the longer gears by Studebaker. Please explain.
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