OHV or SOHC

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Cindory - 12 Dec 2005 06:11 GMT

Hi, can anybody explain me what the difference is between OHV and SOHC ?
i can't know that here.
Thank you very much
Claude from France

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Ed White - 12 Dec 2005 14:04 GMT

OHV = Over Head Valves. The valves are operated by push rods from a cam
mounted in the block between the banks.

SOHC = Single Over Head Cam. The valves are operated by a cam mounted
in the head. (there are really two cams; one in each head; but this is
referred to as a single overhead cam when you are talking about a vee
configuration engine; a dual overhead cam vee engine would have two
cams in each head).

Ed

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Ulysses - 14 Dec 2005 17:19 GMT

> Hi, can anybody explain me what the difference is between OHV and SOHC ?
> i can't know that here.
> Thank you very much
> Claude from France

If you mean which used Explorer should you buy there were problems with the
SOHC engines' timing chains and tensioners from about '97 to '01 (I think).
I bought a '97 with the OHV engine and I'm happy. If the eighth digit in
the VIN number is an "E" the engine is a SOHC. If it is an "X" it is a OHV.

If you do a google.com search using "explorer SOHC timing chain" you should
find lots of information about the problem.

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