2004 Ford Explorer Q&A
2004 Ford Explorer Question: head gasket and timing chain
Yes, a vehicle will start with a blown head gasket, but will have excessive white smoke/ steam coming from the tailpipe. It is usually accompanied by a rough idle and consuming coolant. A worn timing chain usually makes a rattling noise at idle on this model. It sounds as if the engine needs some major repairs. - Brian Glastetter
A rattling noise from the engine may indicate that the timing chain cassette is worn. Our technicians tell us that installing an updated cassette and timing chain tensioner should correct this conc...
it also has white smoke coming from the tail pipe.