Did the search first, learned a world of info, ,THANX. but not what I was looking for. How does one tell the difference between a OHC & a SOHC while still in the truck. My 89 Ranger has a very tired 2.9. 5 speed. I found a one owner 94 exploder with a 4.0 with a complete service record from day one, for 300.00 with a blown auto trany. I would like to put the 4.0 into my ranger. I know the OHC will fit with little trouble. So how do you know what difference?

 

if its out of a 94 than its for sure an OHV (over head valve) 4.0, not the SOHC (single overhead cam) 4.0. the OHV was used in the explorers up until 97 and in the rangers untill 2000 before they switched to the SOHC.

 

you really didnt search much. the two engines look completely different.

 

Could not find any pics. thank you Patrick K

 

SOHC is a 4.0 engine found in the bay of 2000+ rangers.
OHV is a 4.0 engine found in 1990-2000 Rangers.


Simply, just go by the year of the ranger. Are you trying to tell the dfiference between a 3.0 and 4.0 engine? Because the 3.0 is also OHV. And additionally, any ranger wiill say what the engine is on the door, or usually on the engine sometimes.