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Q: Timing Chains on 2007 Ford Explorer Sport Trac

Took my Sport Trac in because of problems with transmission (just had it rebuilt), now they have torn the engine down, and are saying it will cost more than the truck is worth to fix, as it has 3 timing chains, and they will have to be replaced! Does this sound even remotely right?
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The chains on a 2007 engine really should not be "needed". Issues with this engine and the chains, guides and tensioners were experienced in the late 90's, but by 2007 had long since been resolved.

Hard to diagnose something specifically like this without seeing it, though, of course.
I think not. I have a 2007 with 102,000 km and noticed a ticking sound coming from engine. Thought it was a lifter, got the oil changed and sound did not go away. Took to the garage and was told the cassette was worn out after they took off the valve cover and manifold. Said to replace it would cost around $3000.00 dollars, and to replace with a motor with less kms would cost me $4,300.00. To put plastic guides or cassettes as they called is friken ludirious. Not a big ford fan anymore. Maybe time to sell my mustang too.
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