4.0 OHV Timing Chain - Ranger-Forums - The Ultimate Ford Ranger Resource


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

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Old 08-10-2010
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4.0 OHV Timing Chain

What should be the service interval on the 4.0 OHV timing chain in my 94 Ranger?

Thanks,
Jonathan
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Old 08-10-2010
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you really dont have to change it if you dont want to.
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Old 08-10-2010
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Well I have the motor open but I really don't feel like putting a timing set on it.
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Old 08-10-2010
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timing chains do have a service life and they do stretch over time

everything i have read about them is::: every 100,000 miles

every time you start the engine you place a shock load on the timing chain
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Old 08-10-2010
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tis true but you really dont have to. they are strong chains thats for sure.
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Old 08-10-2010
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well if you have the engine apart anyway

to avoid any timing problems down the road later on

now is the best time to replace the chain and sprockets
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Old 08-10-2010
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Quote:
Originally Posted by cheese_man View Post
timing chains do have a service life and they do stretch over time

everything i have read about them is::: every 100,000 miles

every time you start the engine you place a shock load on the timing chain
Wrong wrong wrong wrong. OHV timing chains have a replacement interval of 500,000 miles or engine rebuild, whichever comes first. They are short chains so wear on the chain pins doesnt change timing much. Timing chains for OHC engines should also last the life of the car, but being longer they do tend to stretch more. Timing belts are made of rubber and have to be replaced at regular intervals.

If the front of the engine is already taken apart, replacing an OHV timing chain is a piece of cake and you might as well replace it.
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Old 08-11-2010
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I can't think of anyone I know who had to replace the timing chain on a 4.0l ohv, even trucks with well over 200k miles.
It's not going to hurt but I really doubt you need to.
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