Building an engine is very much like most things in life - the more effort you give to attention to detail, the more likely you'll get the results you want.
Whether you are installing a new stock or performance camshaft or even simply rebuilding your motor with the stock camshaft, one of the most important things you can do is get the valve timing correct.
But before you can accurately set your timing you MUST have a timing gear and chain set that is not loose. A loose timing gear/chain set can be the result of simply worn out gears/chain or very often because the motor has had a 'line bore' done on the crankshaft at least once in its life.
The process of line boring a block requires that the main caps be machined down to make the bore smaller. A new perfectly round hole is then made. This process results in the center line of the crank being moved over so lightly closer to the camshaft. The result is that even a new set of stock gears & chain will still be loose. One solution is modifying the assembly to accept a tensioned chain from a later model motor. This is a pretty good option if you are handy with fabricating and you're not building a high performance motor.
The best solution to this problem was...
Oversized Steel Duplex Timing Gear Kits Available in the following offsets: +.002, +.005, +.010
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Mini Mania, Inc. 870 Gold Flat Road Nevada City, CA 95959
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