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Hppp 060600 Oil Basics 02 Z

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Every Pontiac engine from 1955 through 1981 had a flat-tappet camshaft like that shown here. And most on the road today still use hydraulic or solid flat-tappet grinds. Notice the normal polishing pattern that occurs after proper break-in. Ideally the components will maintain this appearance for several thousands of miles.
The Slippery Truth About Motor Oil

Every Pontiac engine from 1955 through 1981 had a flat-tappet camshaft like that shown here. And most on the road today still use hydraulic or solid flat-tappet grinds. Notice the normal polishing pattern that occurs after proper break-in. Ideally the components will maintain this appearance for several thousands of miles.  View Related Article

 

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