What would cause a lifter to collapse on a 2010 stratonliner deluxe with 600 miles on it? There is a tapping sound in the motor that was diagnosed as a collapsed lifter. What would cause this problem with only 600 miles on the bike?

Most engines now use hydraulic lifters and they can leak a little, this causes space between then lifter and the push rod. This results in a tapping noise that goes away when they get warm or fill back up.

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repairpal.com > Problems > Mazda > Mazda6

what engine the V6
did you read the TSBs on chain noise of lifter noise.
how many miles on engine? 100k, 500K?
not changing oil frequently dooms most HLA lifters. they gum up and click (collapse)
same with chain
same with the tensioner,
a good tech, can find which part ticks with a $5 stethoscope.

You may have a collapsed lifter

Ticking sound could be coming from a Coil-on-Plug, or a pcv valve, or (hope it's not) a valve lifter which could be sticking. Sticking lifter noise often disappears when rpm's change, or the noise comes & goes. try changing the motor oil & filter right after adding an Engine-Flush Treatment to the motor oil, running the engine for 10 minutes at idle with treatment added to the oil, then draining the oil & changing filter while oil is still very hot. That last part is very important, so be careful not to burn your hands - be careful. -- The sticking lifter is a likely cause if motor oil has not been changed at frequent intervals in the past (every 3-4K miles) -- dirty oil causes sticking lifters.

Yes, that is the probable cause. Try an oil additive for noisy / stuck lifters -- Pep Boys has it.

Also, if oil & filter haven't been changed in the last 5,000 miles, that should be done before the additive is used.

Charlie

First unless some one put a high pressure oil pump in it, you shouldn't be getting 60lbs of pressure. You might want to replace the oil sending unit to see what your pressure really is. Listen to see where the tapping is coming from, top or bottom of the engine. If it,s the top then it's a lifter/s. this can be caused by wear or a collapsed lifter. Wear can be adjusted out. collapsed lifters are usually dirty. they can be cleaned while the engine is running, ask your mechanic. If the noise is coming from the bottom , then your bearings are wearing out. this is an engine over haul or time for a different engine. Oil breaks down and looses viscosity (thickness of the oil) this is why the pressure goes down. You can drive your car to get the oil change. I would suggest an oil treatment be added to your car if you have really high miles.

Could be a lifter.. The lifters are what opens & closes the valves.. Oil passes through a tube in each lifter.. If the tube is clogged the oil wont get through and cause the tapping noise..

you may have a collapsed lifter

if its the 3.1 or 2.8 engines this is a collapsed lifter. it is normal. your local G.M. dealer has a oil additive that will fix your noisey lifter.