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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 10-19-2009
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rockers,rollers

so it was mentioned to me that mabey i should invest in some rockers & rollers. What exactly do these do? Were can i get some? What kind of gains should i expect? i have a 4.0 sohc
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Old 10-19-2009
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Save your money. Your 4.0 SOHC came from the factory with roller followers.
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Old 10-19-2009
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What the heck is a roller follower??
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Old 10-19-2009
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Old 10-19-2009
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In the case of the 4.0L SOHC, the roller follower assembly is a device that contacts a hydraulic lash adjuster at one end, the valve stem at the other and has a roller for the camshaft in between.

In the diagram, the roller follower is #3, the lash adjuster is #4.
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Last edited by V8 Level II; 10-19-2009 at 10:02 AM.
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Old 10-19-2009
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Don't question the Great Bob's vast bank of knowledge...
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Old 10-20-2009
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Quote:
Originally Posted by fraser19 View Post
so it was mentioned to me that mabey i should invest in some rockers & rollers. What exactly do these do? Were can i get some? What kind of gains should i expect? i have a 4.0 sohc
On engines where the cam is in the block (ohv) you can usually sneak in a shorter "rocker arm". What this does is to open the valve a little more with the same cam. That increased valve opening allows more air in.. and there-for you can make a little more power.

However a OHC (over head cam) engine has the lifter -to- cam -to- valve distance fixed. A different set of lifter won't open the valve any more than it already does.
You could maybe get a lighter set.. or maybe one that will give less friction. But you can't gain any mechanical advantage and open the valve any further.

Rich
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Old 10-21-2009
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sorry for the thread jack but bob i've been stalkin your posts and you are the MAN!!! btw i freakin LOVE your truck!!!! thats my dream ranger!!!!

{end thread jack}
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