every Cleveland enthusiast laments "it doesn't have a main priority lubrication system". Then we try to patch it with band-aids, and we suffer with incompatible lifters, etc, etc. But some people obstinately insist they don't need lifter bore bushings. I was one of them.
In the 1970s and 1980s the consensus was only solid lifter motors needed lifter bore bushings, hydraulic lifter motors didn't need them. I even owned the kit that Ford sold for installing them, but I still didn't install them in my own motors, because they were hydraulic lifter motors.
But because Denny patiently presented his case for the bushings, over and over, it finally sunk into my thick skull. 16 lifter bore bushings and 5 cam beariing restrictions modifies the lubrication system so that it functionally behaves as a main priority system. Everything else is a band-aid, this is the REAL fix. Look at all the issues the bushings resolve:
(1) Preventing the drop-off of hot oil pressure at high rpm
(2) Resolving the inadequate supply of oil to the rod bearings at high rpm (normally the rod bearings for cylinders #2 and #7 are the first to loose lubrication)
(3) Resolving incompatibility between the Cleveland lifter bore design and modern lifters
(4) Repairing excessive lifter bore wear on high mileage blocks
(5) Preventing excessive oil leakage at the clearance between the lifters and the lifter bores
(6) Controlling how much oil flows to the valve train (solid lifter applications)
(7) Metering the same amount of oil to all 16 rocker arms
(8) Preventing the loss of motor lubrication if a lifter pops out of its bore
(9) Isolating the reciprocating motion of the lifters from the right hand oil passage which also supplies the main bearings. This prevents the pulses and wave action resulting from the motion of the lifters from impacting the oil feed to the main bearings
(10) Modifying the lubrication system, in conjunction with cam bearing oil passage restrictions, so that it functions as a main priority lubrication system
Those who, like me, refuse to install the bushings are fighting over what? The cost is only $400! Guys spend more than that on valve covers. The bushings fix the Cleveland, they fix it right, they fix it once and for all.
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