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Bronco 2.7 Failures…
- Thread starter FORZDA3
- Start date
This engine has been around for awhile, so I'd guess a supplier problem. There are four possibilities: The valves themselves are breaking; that would be the easiest to diagnose. The retainers are breaking- possible bad heat treatment. The springs are failing- possible bad heat treatment. The hydraulic lifter which also serves as a "guide" for the finger follower is allowing the follower to slip off the valve stem- resulting in the retainers to pop out. All will result in some pretty impressive collateral damage.
I'd call that catastrophic collateral damage
