One problem related to timing tensioner has been reported for the 1999 Ford Explorer Sport. The most recently reported issues are listed below.
I was driving home from work and a loud noise came from my engine I took it to a shop to look at it and they new what it was right away it was the timing chain tensioner and the owner of the shop told me this has been a known problem with the 4. 0l engines with that sad why isn't there a recall on this part they make replacement kits just for this problem and this lead to more damage to my truck replacing the chain in all it's coasting me about 800 dollars should this be a recall because if the chain would have broke the motor would have bent the rods in the engine and who knows what could of happened?.