Lifter Bleed Down
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Stellar HDF Member
Joined: Jan 2015
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From: ct
Lifter Bleed Down
So today I was in my push rod tubes and decided to spin the rod,just because,and it did not turn,only with a wrench I could spin it. Thought this was odd as my bike has not been started in three weeks. Front exhaust,the other three all spun by fingers.
Yes they are all adjustable and equal flats when adjusted last. What y'all think about that one not bleeding down ?
Yes they are all adjustable and equal flats when adjusted last. What y'all think about that one not bleeding down ?
Seasoned HDF Member
Joined: Jun 2010
Posts: 9,333
Likes: 3,883
From: Upstate New York
Are you sure the lifter is on the base circle of the cam (valve is closed)? No matter where the cam is rotated, at least one valve will likely be open, at least partway. the fact that you can spin the other three pushrods says this is probably the case.
Remember, there isn't much travel in a lifter. If you're "parked" on a cam lobe, even if the lifter is fully "collapsed" the valve will still be held open by the cam.
Remember, there isn't much travel in a lifter. If you're "parked" on a cam lobe, even if the lifter is fully "collapsed" the valve will still be held open by the cam.
Last edited by Uncle G.; Mar 4, 2018 at 01:08 PM.
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Stellar HDF Member
Joined: Jan 2015
Posts: 2,504
Likes: 150
From: ct
I'm sure it is parked on a lobe,but for some reason I was thinking it would spin easily after sitting for so long. Guess I forgot about the fact that the spring pressure is still on it and the valve is still opened and only bled to that point. I think I was having a brain fart.
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Stellar HDF Member
Joined: Jan 2015
Posts: 2,504
Likes: 150
From: ct
No ,not bugging me at all,I should have known but I'm not getting younger and my brain needed to fart. I wasn't thinking,that will happen again btw.....
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Grand HDF Member
Joined: Nov 2009
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From: Tampa
For what it's worth, there is never a crankshaft position where none of the pushrods are not under some kind of spring pressure.
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Cruiser
Joined: Dec 2017
Posts: 172
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From: Marshfield, Wisconsin
that's a great idea! I'm assuming you squirt it through the spark plug holes? Would it be worthwhile to get some on the rocker assemblies too?
Seasoned HDF Member
Joined: Jun 2015
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From: West Central FL
I never like to put Marvel Mystery oil anywhere near where it might find its way into the engine or trans oil. It's a penetrant and loves to seep into gaskets and every other nook and cranny to cause leaks in base gaskets, head gaskets "O" rings and seals.
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