Posted by MIchel Chen on

About Ford 4.0 SOHC engine.....

The 4.0 SOHC engine was notorious for the OEM timing chain guides breaking causing timing chain rattle or "death rattle". 

This problem can occur as early as 45,000 miles in some vehicles.
When the engine is run for a extended period, it will lead engine jumps timing.
Depending on the problem severity level, this may damage the clinder head & valves and interfere engine.

However, preventive maintenance, such as regular oil changes and replacing camshaft timing chain tensioners can prevent timing chain from failing and rattling.

The common repair process to permanently fix timing chain rattle involves replacing all the timing chain guide cassettes with stronger aftermarket units. 

The necessity of removing the engine to replace the rear guides can make whole process last more than 4-6 hours.

So, don't be surprised when you see the labor charge for the timing chain set replacement.


Read More:
<How do you know if the timing chain is worn?>

Transfer Case Series 


Timing chain rattle problem was mitigated a bit, though, not fully resolved, as the cassettes are modified after 2002.

Below Ford vehicles equipped with the SOHC engine may occur chain rattle problems,


  • 2001–2012 Ford Ranger 97-06 
  • 2001–2010 Mazda B4000
  • 1997–2010 Ford Explorer/Mercury Mountaineer
  • 2004–2006 Ford Courier
  • 2005–2010 Ford Mustang
  • 2005–2009 Land Rover LR3

  • Luckily, the 4.0 OHV was not influenced with this issue.


     The replacement cost of 4.0 ford engine timing chain guide kit is around $450~$1050 for parts & labor cost.

    Keep in mind, timing chain set is complicated and needs qualified mechanics art craft.  Don't forget to consult your auto shop for assistance!

    Look For Timing Chain Kit for Ford Explore 4.0 ? Check it out!!!! 



    Read More:
    <Chain or Belt? Timing System Innovation with Chain and Sprocket>

    <Something you need to know your 2000 jetta vr6 timing chain kit.>

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