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SportTrac Discussion
Engine & Drivetrain
Front Timing Chain Hydraulic Tensioner Disaster Averted
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<blockquote data-quote="swshawaii" data-source="post: 1037525" data-attributes="member: 67547"><p>After you read this thread it's obvious I'm no expert regarding hydraulic timing chain tensioners. Strange thing is many reliable sources say Ford's replacement interval is 75,000-80,000 miles, but I've never seen that written in Ford manuals. I believe the key indicators of trouble is a cold start up rattle and chain slap driving in second gear typically between 2000-3000 RPM's. I DID have an intermittent start up rattle regardless of the engine being hot or cold, and don't believe replacing both tensioners improved the condition. If you're at 250,000 miles and haven't experienced any timing chain guide or oil pressure issues you are obviously doing something very right. IMO, keep changing the oil and filter at your present intervals and don't change a thing. Now about your 5R55E @ 250K. You have a "miracle" Gen 1 ST if the transmission has also been trouble free with just routine maintenance. May be time for you to win a lottery.</p><p></p><p>Here's that "rattle" TSB that lists 2001-2002 Sport Tracs, but doesn't apply to 2003-05.</p><p><a href="http://www.bbbind.com/tsb-wiring-diagrams-database-results/?type=TSB&years=2001&make=52&makeDesc=Ford&model=1586&modelDesc=Explorer%20Sport%20Trac&system=12&systemDesc=Gasoline%20Engines&docid=6631419" target="_blank">http://www.bbbind.com/tsb-wiring-diagrams-database-results/?type=TSB&years=2001&make=52&makeDesc=Ford&model=1586&modelDesc=Explorer Sport Trac&system=12&systemDesc=Gasoline Engines&docid=6631419</a></p><p></p><p>TSB's and Wiring Diagrams (Register for FREE new account)</p><p><a href="https://www.bbbind.com/tsb-wiring-diagrams-database/" target="_blank">https://www.bbbind.com/tsb-wiring-diagrams-database/</a></p></blockquote><p></p>
[QUOTE="swshawaii, post: 1037525, member: 67547"] After you read this thread it's obvious I'm no expert regarding hydraulic timing chain tensioners. Strange thing is many reliable sources say Ford's replacement interval is 75,000-80,000 miles, but I've never seen that written in Ford manuals. I believe the key indicators of trouble is a cold start up rattle and chain slap driving in second gear typically between 2000-3000 RPM's. I DID have an intermittent start up rattle regardless of the engine being hot or cold, and don't believe replacing both tensioners improved the condition. If you're at 250,000 miles and haven't experienced any timing chain guide or oil pressure issues you are obviously doing something very right. IMO, keep changing the oil and filter at your present intervals and don't change a thing. Now about your 5R55E @ 250K. You have a "miracle" Gen 1 ST if the transmission has also been trouble free with just routine maintenance. May be time for you to win a lottery. Here's that "rattle" TSB that lists 2001-2002 Sport Tracs, but doesn't apply to 2003-05. [URL='http://www.bbbind.com/tsb-wiring-diagrams-database-results/?type=TSB&years=2001&make=52&makeDesc=Ford&model=1586&modelDesc=Explorer%20Sport%20Trac&system=12&systemDesc=Gasoline%20Engines&docid=6631419']http://www.bbbind.com/tsb-wiring-diagrams-database-results/?type=TSB&years=2001&make=52&makeDesc=Ford&model=1586&modelDesc=Explorer Sport Trac&system=12&systemDesc=Gasoline Engines&docid=6631419[/URL] TSB's and Wiring Diagrams (Register for FREE new account) [URL]https://www.bbbind.com/tsb-wiring-diagrams-database/[/URL] [/QUOTE]
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SportTrac Discussion
Engine & Drivetrain
Front Timing Chain Hydraulic Tensioner Disaster Averted
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