Sights, Sounds and Symptoms

If you hear TAPPING, it could be:

– Incorrectly set valve tappets

– Camshaft bore too large (camshaft too worn)

If you have Vibration in the engine, check:

– Engine not balanced before reassembly

– Flywheel or other “moving” components changed after balancing

– Balanced components not assembled as balanced

– Components not balanced together (static only – not dynamic)

– Dead or dying spark plug/distributor body and/or points

– Ignition; timing incorrectly set (usually too far advanced)

– Carburetor is running too lean

– Intake manifold; intake vacuum leaks anywhere in the intake system

– Fan is either bent or unbalanced blades, not properly “settled” onto taper of water pump shaft, or just plain loose

If you have other Vibration, check:

– Driveline; bent shaft or pinion gear lock nuts loose

– Differential; bad bearings and/or races, pitted or incorrectly set ring pinion, or bent axle shaft

– Transmission; bad bearings, bad gears, bad maindrive gear, and/or frozen pilot bearing in flywheel

– Wheels; extremely out of balance or bent.  Loose lug nuts.

– Generator has frozen bearing

– Universal joint; not bolted to mainshaft to transmission, not packed, or just plain too loose

If you are Leaking Oil in the Rear of the engine, check:

– Main bearings too worn or out of tolerance

– Thrust face damaged or worn on rear main

– Gasket between flywheel housing and back of engine block forgotten or damaged

– Oil pan gasket improperly installed or damaged

– Oil return tube on rear main bearing cap missing or its oil return passage is plugged

– Rear main shims improperly installed

– Rear oil slinger improperly installed or missing

– Oil filler cap plugged or sealed

If you are Leaking Oil in the Front of the engine, check:

– Timing cover to crankshaft pulley packing damaged, worn or installed “dry”

– Timing cover gaskets damaged or improperly installed

– Crankshaft pulley excessively worn (you will see a deep groove worn in it)

If you are Leaking Oil in the Side of the engine, check:

– Oil pan gasket damaged or improperly installed

– Oil pan bolts not tight

– Oil return tube gaskets damaged or improperly installed

– Copper compression washers beneath oil return pipe mounting bolts forgotten

– Little pipe plug in side casting adjacent the oil pump forgotten

– “Blow-by” forcing oil out under the filler cap

 This tech tip was originally printed in the July 2001 “A” Quail Call.

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