The moment your Pontiac's milometer reads thousand miles, you will realize that different engine components will start to age and wear out. Pontiac timing belt/ timing chain is one such component which really needs inspection by this time. Pontiac timing belts are the cheapest means of power transmission which runs smoothly with a little noise between shafts that may or may not be axially aligned either to transmit power or to track relative movement. Pontiac timing belts protect all machines from overload, jam, noise and vibration.
Pontiac timing chains are preferred over Pontiac time belt as they are less susceptible to breakage but still are not of maximum use because they are noisier, less efficient, and more expensive than a Pontiac timing belt. The longer Pontiac timing belt/ chain runs, more timing jumps and excessive motion is possible. Pontiac timing belt is toothed rubber belt that keeps the crankshaft, aux shaft, and camshaft in time with one another with high-tensile fibers like fiberglass or Twaron / Kevlar which runs the length of the belt.
The intake and exhaust valves are driven by camshaft, and Pontiac timing belt drives the camshaft. The intake valves allow air into the combustion chamber and mix with the fuel which is to be ignited to produce power. The resultant that is exhaust of this reaction is blown out through exhaust valve. Any kind of interference in this process like damage/ decay of Pontiac timing belt will lead to inefficient working of engine which may run roughly producing harsh/ excess noise. The life expectancy of Pontiac timing belt is to lower a hot or leaky engine. Pontiac timing belt can bear upto 200 hp (150 kW) at speeds of 16,000 ft/min.
Some of the Pontiac cars using Pontiac timing belts and the brand of the timing belt are Pontiac Firefly (1999) uses Dayco timing belt, Pontiac Firefly (1996) uses Gates timing belt, Pontiac LeMans (1969) uses Cloyes timing belt etc.
When to replace?
A broken or poor Pontiac timing belt results into poor driving condition, knocking valves, power loss, rattling noise from the engine and finally a wretched engine. A slipped Pontiac timing belt may throw off balance, producing irritating vibrations and harmonics.
If your Pontiac timing belt comes up with symptoms like wearied or broke cords, worn-out teeth, missing rubber chunks, deep cracks, cracks on the surface or cracks near the base of the belt teeth, then you may have to replace it without any delay!
Why to replace?
You must replace the Pontiac timing belt by the periods suggested in the user manual i.e. at 60,000-mile intervals and must replace other associated parts like belt tensioner or idler pulley to avoid the premature wear-n-tear. To avoid a sky-high repair bills down the road you should check Pontiac timing belt as it may cause severe damage to other engine parts. An important point to be noticed while replacing your Pontiac timing belt is to check that the valve and piston movements are synchronized properly. Whether you are planning for a hard drive this summer or in winter, for your safe excursion, properly cared and well maintained Pontiac timing belt is a must.