1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 501Get this manual

1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 501

VALVE MECHANISM REMOVAL IRemove rocke rm cove r(s) as utlined2Remo ve roc ker arm tud nutball unit and rocke arm INSPECTION
little att en tionLifters are extreme ly impl in de sign, readjustment are not cessary nd servi in requires onlv that care
and clea nliness re exercis ed in th ha ndling of ts LOCATING NOISY LIFTERS Locate noi sy valve lifter by us ing piec of
garde hose approximate ly ft (1.2m) in lengthPl ace one nd of hose near end of eac intake and xhaust valve, with other nd
of hose to the ea rIn thi mannerth sound is locali zedmak ing it easy to de te rmine whi lifter is fa ultnother method is
to pl ce fing on face valve spring la iner If lifte is not functionin properl y, dist inct hoc will be fe lt when valve returns
to its seatGenera types of valve lifter noise are as fo ll ow: 1Hard rapping noise suall ca used by pl unger bec oming ti
gh in bore of lifter bod so that re turn spring ca nD ol push plunge back up to working positionProbable causes are: aExc