Editing Ford Cologne V6 engine (section)

==== Timing chain problems ====

The 4.0 SOHC engine was notorious for the [[Original equipment manufacturer|OEM]] [[Timing belt (camshaft)|timing chain]] guides and tensioners breaking, resulting in timing chain rattle or "death rattle". This problem can occur as early as {{cvt|45000|mi}} in some vehicles. Due to the SOHC engine's unique design involving both front and rear timing chains, the repair of the timing guides would often require complete engine removal depending on the severity of the problem. When the engine is run for an extended period of time with this issue the engine can jump timing, damaging the heads and valves.

Timing chain rattle was mitigated in later years of the SOHC (in most vehicles, after 2002) with updated cassettes and tensioners. This problem occurs with varying frequency among some Ford vehicles equipped with the SOHC engine including the [[Ford Mustang]], [[Ford Explorer]], and [[Ford Ranger (North America)|Ford Ranger]]. The 4.0 OHV was not affected by this issue.<ref>{{cite web|url=http://www.explorerforum.com/forums/index.php?threads/timing-chain-rattle-resolution-process-sohc-v6.278100/ |title=Timing chain rattle resolution process – SOHC V6 ''ExplorerForum'' |publisher=ExplorerForum.com |date=2010-04-25 |access-date=2018-06-18}}</ref>