[Ruthlessmr]

hello just wondering if anyone had ran across the 4.0 v6 motor in like explorers
that when you start it knocks then goes away
shift rpm it comes back shifts then goes away
we had 2 of these motors do the same thing but never had a issue
both were close to 200000 miles good oil press ect
just wondering thanks

 

[matt167]

OHV or SOHC? SOHC can have timing chain rattle which sometimes sounds like knocking. Never heard an OHV knock.

I had a '92 Ranger with 2.9 ( predecessor to 4.0L, both are Cologne engines ). It knocked 3 times when shut down. 202k miles on it and I sold it running/driving

 

[Ruthlessmr]

1994 ford explorer motor
1996 ford explorer