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| | | | Joined: Feb 2010 Posts: 478 'Bolter | | 'Bolter Joined: Feb 2010 Posts: 478 | I was wondering if there should be any rubber seals in the center of my rocker shaft assembly to help push more oil to the ends? | | | | | Joined: Feb 2019 Posts: 4,513 AD Addict & Tinkerer | | AD Addict & Tinkerer Joined: Feb 2019 Posts: 4,513 | There were no rubber seals on my assembly from a ‘59 235. These assemblies don’t need allot of oil and you won't find them gushing, only weeping. As long as you have a weep at both ends of the assembly, your good. If not you’ll have to start looking for the real issue.
Phil Moderator, The Engine Shop, Interiors and Project Journals1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc BrakesProject JournalsStovebolt Gallery Forum | | | | | Joined: Dec 2018 Posts: 2,450 'Bolter | | 'Bolter Joined: Dec 2018 Posts: 2,450 | Chris's 46/515 All just metal to metal,if you can just have it wet wth oil as phak says that's all it takes,just weeping some oil at all the rockers. If you notice at your center splice on the rocker shafts there may be a 1/4 inch oil stream going back to the pan. Mechanics used to squeeze that off with their dikes to increase oil flow to the rockers.
Last edited by fixite7; 05/03/2023 12:29 PM.
| | | | | Joined: Dec 2008 Posts: 1,923 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 1,923 | With the engine at operating RPM, the valve cover is full of oil vapor, all parts get mist or splash lubrication. It worked for millions of engines.
If you have it apart, a 3∕32” (.093”) “spit” hole in the rocker’s upper surface provides oil for the valves springs, stems, &c. These holes must be open and clean or the parts will not last. These holes must not connect directly to the rocker’s annular internal oil distribution groove (which may occur with mis-matched parts).. | | | | | Joined: Jan 2022 Posts: 2,499 'Bolter | | 'Bolter Joined: Jan 2022 Posts: 2,499 | Mechanics used to squeeze that off with their dikes to increase oil flow to the rockers. Not sure about Chevy engines, but on GMC sixes that flow lubricated the distributor to cam gear interface. More info here.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
| | | | | Joined: Feb 2004 Posts: 29,881 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,881 | By 1962, the rocker shaft no longer had a free flowing drain tube in the oil connector. Flow to the shaft was metered by a small diameter orfice in the oil passageway from the block to the cylinder head.
Jerry
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