2001 ford Explorer - engine rattling - is that timing belt/chain

unless you have a distinct chain rattle noise then it will last longer than a belt which is 100,000klm so have it checked but it should be good for around 120k

heads of the engine might need head gaskets

Could be the noise for the chain would be around the belts. It would be a rattle type noise. How many miles on vehicle

Make sure the oil level is good. The hydraulic tensioners for the chain work with the engine's oil. If low it will make a rattling/knocking like noise.

being that you most likely have a 4.0l s.o.h.c. engine you have a timing chain which only needs inspection around 100,000 miles for excessive wear on chain guides and leaking cam seals. this setup tends to last far beyond that mileage without any maintenence. if this was helpful please leave positive rating.

yes I would due engine. heck for $2,200 dollars I could do the job parts labor and all

Timing CHAIN tensioner you mean? Better have that noise checked ASAP. It may be a problem with the timing chain.

Now. i think the interval is 75 to 80 miles for belts. double check that it doesn't have a timing chain. if it has the 2.4 ltr eng than you have timing chain and around 120k is fine.

According to Ford the scheduled replacement is 120K

Hi There,
Is this a 4 or 6 cylinder? How many miles?