What is the cost to replace timing chain in 2002 ford explorer

the timing chain would need replaced, but as far as the water pump and belt, it would depend on their condition. If the pump isn't leaking and belt isn't cracking, you would just need to replace the mounting gasket. It would be your choice depending on cost.

why not buy a manual as it has a lot of good info you will need and you will probably use the manual for other things.

I dont think there is any "Recall", just updated parts, Its going to be expensive. ifyou are going to keep it for another few years, do it now, if not, sell it ASAP. .

No, it wont cause the engine to go bad. If the timing chain or belt breaks, that can do major damage to the head. It usually cost around six hundred dollars to have it replaced. If you do it yourself just the cost of parts. Here are the INSTRUCTIONS for replacing it to give you an idea of what's involved.

YOU HAVE TWO CHAINS WHICH LABOR TIME WOULD BE 14.3 HOURS. DEALERSHIP PROBABLY $1200.00 A PRIVATE INDEPENDANT GARAGE CHARGE YOU ABOUT $500.00. BUT CALL AROUND GET A PRICE CHECK.

just need to know what kind of tools to use?

All shops are different. It depends on where you take it for service.

Unless the timing chain suffered a catastrophic failure, ie broke into many pieces, you should not need to replace the cam and crank gears, the tensioner arm and tensioner. The timing chain and guide I can agree need to be replaced, but without a physical examination, you can't just say "replace all these parts". If you do let this mechanic do the work, insist on him giving you ALL the old parts. Then take them to another shop and ask their opinion. You may find the mechanic is honest, but I suspect not.

Switched the fuses out for new ones

No engine available in any Ford Explorer uses a timing belt. The cams in all avaiable engines are driven by a chain, this chain has no specific time or mileage recommendation for replacement and in most cases lasts the life of the truck.