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Old 08-07-2012, 02:14 PM
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Help tips and tricks rebuilding 4.0 SOHC Engine

Excuse me if this is off topic. I own 2 Explorers with 4.0 ohv engines with a total of 600,000 miles between the two. Done everything myself to keep them running. I bought a 2001 Explorer sport with a non running 4.0 SOHC Engine. The day we bought it the motor spun no compression like a bad timing chain. Todate we've pulled the timing chain cover valve covers bought the chilton manual and Dataonline subscription. I'm convinced the engine was designed by aliens with 3 timing chains in the front and 1 in the rear you have to remove the motor to pull the heads or repair the timing chains. The timing chains are good the motor spins freely w no compression. Anybody seen this free wheeling no compression condition before or rebuilt one these motors w/out at the special tools Data online is requiring a purchase of $400 worth of tools to set the timing chains correctly in time. Thanks Scoulter1

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Old 08-07-2012, 04:36 PM
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You need the the suitcase of tools to align the cams. The kit is available online for about $200-400. Do buy all new timing components to avoid having chain issues again soon. There are some improved design parts too, so make sure you get the latest parts. If you dont get the cams right, you will never get it to run without setting codes constantly.
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