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1974 454 coupe 25,000 miles.
The car starts normally most of the time but then it will occasionally start with a knock.
When it knocks (occurs in the front of the engine), the knock will go away after a few miles.
The knock will sometimes go away if I shut the car off, then restart.
When the knock goes away the car runs normally.
Any idea what could be wrong?
it seems to occur after the vehicle has sat.
it goes away after about a minute or so and does not happen again till the next start.
on some starts it doesn't happen at all, runs great.
Could the tapping noise (it comes from front of engine) be a lifter that loses it's lubrication when at rest
then taps until it gets lubricated shortly after start up?