We have replaced the timing components as well as the intake valves All the valves were bent after jumping time. After replacement we turned the engine by hand and the timing chain gets slack in it at each depression of the rocker arms. The slack goes away and the chain becomes tight once the rocker arms are released. This hapens for all 4 ... Timing belts are also less complicated (chains require an oil bath). Chains are generally stronger, so vehicles with timing chains often drive more than just the cam with Due to stretch, when you change a chain you MUST replace all the timing gears, as the teeth will wear to match the chain stretch.Order Timing Cover Gasket Set for your 2003 Chevrolet Cavalier and pick it up in store—make your purchase, find a store near you, and get directions. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. Bulletin Date: 09-01-2003 Component: 980000 unknown or other Summary: Some customers may want to tow their vehicle behind another vehicle with all four tires ont he ground. this bulletin provides information regarding recreational (dinghy) towing for certain vehicles including 1988-2004 chevrolet and gmc li The timing is a chain, to check this u must remove valve cover, crankshaft pulley, tensioner pulley and possibly some other odds and ends, then pull timing chain cover off.