While using a tensioner is ok, all that does is remove the slop. the small block cranks with the big block snout tend to flex at the first counter weight eliminating. That's for a stock engine, not one that you want to have performance out of for any reasonable length of time and certainly not for a brand new one. Chevy TBI is one of the most bulletproof/ stupid simple items Ive done alot with. The book spec is 1/2" play maximum before needing to be replaced. Now, as to the excessive play.and it is excessive. There are more expensive sets all the way up to belt drives, but in general the 100 dollar mark or "there about" is a good indicator you got a good set. And remember, the "about 100 buck" chain sets are not the most expensive. Not saying you do this just making a statement.if you always let price dictate your parts purchases, you will always come out with something inferior to what it could have been. This is why performance drops off some in a new build using lesser quality chain sets. Camshaft timing is as crucial to a good running stock engine as it is to a high performance build. I would not build even a stock engine now with less. If the water pump is being done at the same time. While the cost is cheaper, the chances of further failure increase significantly. Remember, do not opt for a just the belt replacement. Labor on most timing belts is between 3-5 hours, putting your total cost between 400 -1,000.
SMALL BLOCK CHEVY TIMING BELT VS TIMING CHAIN PLUS
The 100 dollar plus sets are billet steel. In most cases, a timing belt kit will run between 100 -350. What you get with a more expensive chain are bigger rollers, solid rollers and not the old split rollers. Yes, IMO even on a stone stock engine you need a good quality chain set. Checking the timing chain for excessive wear is. The result is sluggish performance and frequent backfire through the intake manifold caused by the uncontrolled changes in timing. but the small block engine uses a timing chain rather than a belt. How much did you spend? If you didn't spend "around" or over 100 bucks, you bought junk. As the timing chain in the small-block Chevy engine wears, it stretches and becomes unable to accurately control valve and ignition timing. Some are interference engines and if the belt slips or breaks, engine damage normally.
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