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True Rolling timing chain and gear sets are products of quality material and workmanship. They offer the ultimate in durability, performance, and low friction operation. The main cause of timing chain and camshaft installation problems is failure to apply the proper torque to the camshaft sprocket bolts. The correct torque value is given in the service manual, and we highly recommend the use of a thread-locking compound such as Loc-Tite™ or equivalent. The Edelbrock crankshaft sprocket is manufactured with nine keyways. Each keyway is marked with a symbol indicating a standard straight-up (0), advanced (A2, A4, etc), or retarded (R2, R4, etc.) camshaft position. Never hammer directly on the chain or sprockets. You can crack the hardened links and pins, causing early failures. SPECIAL INSTRUCTIONS: On some late model engine blocks, it will be necessary to check clearance behind the cam sprocket (with the chain on the sprocket) and engine block at the 12 o’clock position. (See photo below). Make sure that the chain clears oil galley bosses on the block with the chain and sprocket in the rearward most position. Grind or machine block for clearance if necessary. Clean block thoroughly before assembly. Alignment of the timing marks as shown below does not always indicate Top Dead Center (TDC) of the number 1 cylinder on the compression stroke. Chevrolet engines will be at TDC of the number 1 cylinder on the exhaust stroke and the crankshaft will have to be rotated one full turn before the distributor can be installed and timed.
Tags : camshaft installation, loc tite, camshaft position, correct torque, exhaust stroke, block chevrolet, chevrolet engines, compression stroke, chevrolet engine, clock position, chain and sprocket, o clock, timing chain, engine blocks, keyway
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