2000 Ford Explorer - 4.0L SOHC

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An overlooked engine noise

Todays modern automotive engine has thousands of parts.  Any one of those parts could cause a rattling noise.  A noise so minor sounding may be so inobvious to the untrained ear.  However, a trained technician may be able to detect a serious problem.

In this case, a couple is looking at purchasing a 2000 Ford Explorer.  The salesman is very courteous and also patient.  There is not much wrong with the vehicle and for the most part they're pleased.  They have looked at similar Explorers and are trying to decide which to buy.  The Explorer they're currently looking at has a rattling noise coming from the engine.  The salesman just says, "it's normal and it does that when it's cold sometimes."  The condition doesn't seem safety related and not to important.

It is important to acknowledge two things in this scenario. It is important to be cautious about noises. Some noises may actually be minor sounding, however, quite serious and expensive to repair. The other thing is that Minneapolis Inspections offers vehicle inspections and also consultations. This couple looked at other similar Explorers before this one. Minneapolis Inspections offers advice on what vehicle may be the best option.

The cause of the engine rattling noise is most likely a failed Primary Timing Chain Tensioner. The Primary Timing Chain Tensioner keeps a constant pressure on the timing chain to keep it connected to the sprockets. The timing chain provides the vital link between the crankshaft and the two camshafts. When the tensioner fails, the rattling noise you hear is the loose chain slapping the Primary Chain Tensioner within the engine. If this vital link breaks, the engine will suffer severe internal damage. Most Explorers with this engine from 1998 to 2001 will need this service around 100 thousand miles. There have been numerous technical service bulletins issued from Ford Motor Company about this issue. There also has been a recall to replace the Primary Timing Chain Tensioner, however the recall has been inactive as of 2001. To properly and effectively repair this issue, the total amount will well exceed one thousand dollars.

The couple may have saved over a thousand in repair bills if they would have chosen a different Explorer. Minneapolis Inspections can help you decide which vehicle may be the best for you.