A distributor specifically can be time consuming to remove and correctly install, since it’s dependent on perfectly aligning the distributor and adjusting ignition timing after the replacement. In general however, this type of job in a shop environment can take up to 8 hours to complete correctly.Click to see full answer. Keeping this in consideration, how long should a distributor last?In the case of contact points, it was recommended that they be replaced as often as once a year. The distributor cap, rotor and spark plugs could make it longer, and were often replaced at the 30,000-mile (48,280-kilometer) tune-up.Furthermore, how often does a distributor need to be replaced? Replacing the distributor cap and rotor at the same time should be completed every 50,000 miles, regardless of whether or not they are damaged. If your vehicle does not put on a lot of miles every year, it’s also a good idea to replace them every three years. Furthermore, how much does it cost to fix a distributor? The average cost for a distributor cap replacement is between $89 and $123. Labor costs are estimated between $50 and $64 while parts are priced between $39 and $59. Estimate does not include taxes and fees.How do I know if my distributor is bad? Usually a faulty distributor rotor and cap will produce a few symptoms that alert the driver that service may be required. Engine misfires. Engine misfires can occur for a number of reasons. Car doesn’t start. Check Engine Light comes on. Excessive or unusual engine noises.