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CVO Technical => Twin Cam => Topic started by: TwoCVOs on April 08, 2017, 08:06:29 PM
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I've tried searching without finding similar symptoms. 17 prostreet breakout with 600 miles. Started out of the blue. Doesn't matter if i let warm up for a few min or if i start and ride. Nice and quiet set idle and when i first start off. Shortly after start to hear what Sounds like lifter and/or rocker noise at rpm a little above idle. With in a min or so goes away again but can not hear at idle. Will not make the noise again until sits over night. I am familiar with the 110 upper noises and rattles from my cvo king and this isn't one. Just seems odd that the rpm need to be up a little fire it to start and that's where oil pressure should be increasing. Thanks for any advice. Dreading the dealer and warranty shenanigans.
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Which dealer do you go to?
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Worth
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My 16 CVo Street Glide with a Wet Head 110 did the exact same thing. I was going to say something to the dealer when I took it in for the 1K service but by then it had gone away. This is my 4th Harley and they have all had valve train noise, it's just the nature of the beast. But the "loud lifter noise after a brief warm up and then goes away" thing was new to me, and it did eventually go away.
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Hopefully that's a good thing. Thanks for the replies.
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Without hearing it for myself, all I can offer is some possibilities. The first would be a lifter or lifters that bleed down overnight and are slow to pump up the next time the engine is started. That's been an all-to-common problem with Harley lifters over the past half dozen years or so, and Harley will call it "normal" even though it isn't normal or acceptable. Another possibility is piston slap, which is worse with a completely cold engine and improves as the pistons heat up. And of course the same thing can happen with other parts of the valve train, such as rockers. Harley's have a multitude of areas subject to sloppy fits that create noises. If you ever get a truly quiet Twin Cam engine, you need to pull in the clutch and restart it because it's obviously not running.
Jerry
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Last week a friend had the lifters (2) fail on his 110" RG, took out the motor, that's the 3rd one in a year. 2 of the guys are members here. If it were mine I would install S&S Premium lifters and adjustable pushrods.
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^^^^^^^^^^^^^^^
Exactly what he said. Trust me, I know first hand.
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Thanks for the answers. Without considering warranty issues and such. If one were to replace the lifters with better ones, is the consensus that the push rods are of adequate length or should those be checked as well. Would like to avoid adjustables. Thanks.
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Stock pushrods are the correct length regardless of lifter brand, assuming you make no other changes that would affect the stacked dimension (i.e. thinner head gasket).
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^^^^^^^^^^^^^^^
Exactly what he said. Trust me, I know first hand.
You're one of 'em Dave.
I like adjustable pushrods so one can set the lifter pre-load a little deeper if one desires to to help with noise.