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VALVE GUIDES — 1948 AND LATER O.H.V. ENGINES

New engines are assembled with steel intake valve guides and bronze exhaust valve guides, however, only bronze guides are furnished on parts order for both the intake and exhaust valves.

Until recently valve guides have been furnished in standard size and .001" and .002" oversize only. The guides were unmarked except for marking on carton.

When guides first became available in five sizes, standard size, .001", .002", .003" and .004" oversize, the only marking to identify size of guides was the part number stamped on carton. Later on, oversize guides were identified by numerals (1 to 4) stamped on guide, indicating the oversize. At the present time oversize guides are identified by grooves (1 to 4) cut in top end of guide, indicating the oversize.

Standard size guide is not marked for identification. If in doubt whether or not a guide is standard size, measure it — standard size guide measures .5655".

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