well if its a 4.6L engine it probably has a chain
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In a 1999 Ford Explorer XLT :
The 4.0 liter Single Over Head Cam , V6 engine has ( 3 timing CHAINS )
The 5.0 liter V8 engine , which is an Over Head Valve / pushrod design engine has ( 1 timing CHAIN )
The 1999 Ford Explorer has a cam chain not a belt. No maintenance is required.
The explorer has a timing chain, not a belt.
timing CHAIN
It has a timing chain.
timing chain
The Ford Explorer engines use a timing CHAIN
Timing CHAIN on the 4.0 liter V6 in a 1993 Ford Explorer
Timing chain.
The 2001 Ford Explorer Sport V-6 has a timing belt. Ford engines have not use a timing chain since the 1980s.
The 2003 Ford Explorer 4.6 liter V8 engine has ( 2 ) timing CHAINS ( one timing chain to each cylinder head )
timing belt
I believe the Explorer does NOT use a timing belt, but rather a timing chain