Andrews 48 valve train noise - Harley Davidson Forums: Harley Davidson Motorcycle Forum
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post #1 of 12 (permalink) Old 04-06-2014, 11:21 PM Thread Starter
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Andrews 48 valve train noise

I have a 2013 street Bob, 1200 miles, with Andrews 48 cam, screaming eagle CNC heads with oversized valves, and adjustable push rods and I have valve noise constantly, I have tried adjusting pushrods multiple times thinking they weren't on the base circle of the can when I adjusted them, and it will not go away, I was lead to believe that the 48 can was a relatively quiet can but it is not quiet at all for me, does anybody else have any issues with noise out of these cams?
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post #2 of 12 (permalink) Old 04-07-2014, 06:43 AM
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Well the cam is bigger then stock as far as lift..hell I had an se11 cam and I could hear a little chatter...just double check your depth in the lifters...most set between .100 and .150 ....as long as you are set right with the pushrods theres not a whole lot you can do...other then swapping to roller rockers (helps a minute bit) or switch oil to conventional vs synthetic...you'd be surprised what a difference oil makes for valve train noise

98 Evo 83.5ci, custom cam, 44cv, lightened ballanced crank, H-Beam rods, beehive springs, tapered pushrods, johnson hylift lifters, SE slip-ons no baffle, 101.78 hp @ 6200rpm
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post #3 of 12 (permalink) Old 04-07-2014, 06:58 AM
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I have a 2013 street Bob, 1200 miles, with Andrews 48 cam, screaming eagle CNC heads with oversized valves, and adjustable push rods and I have valve noise constantly, I have tried adjusting pushrods multiple times thinking they weren't on the base circle of the can when I adjusted them, and it will not go away, I was lead to believe that the 48 can was a relatively quiet can but it is not quiet at all for me, does anybody else have any issues with noise out of these cams?

The 48's are stone-quiet.
We load the lifters to .140"-.150" here.
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post #4 of 12 (permalink) Old 04-07-2014, 08:54 AM
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I have 48's in my 96". They are just as quiet as stock. Maybe a push rod is rubbing a tube?

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post #5 of 12 (permalink) Old 04-30-2014, 10:09 AM Thread Starter
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hey sorry it took so long for me to get back, but i adjusted the pushrods to spec and it still has a terrible tap, im going to assume it is a pushrod rubbing because there was rub marks in the tubes when i took them apart last. now how do i fix that so that it will not make such an annoying noise?
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post #6 of 12 (permalink) Old 04-30-2014, 10:28 AM
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hey sorry it took so long for me to get back, but i adjusted the pushrods to spec and it still has a terrible tap, im going to assume it is a pushrod rubbing because there was rub marks in the tubes when i took them apart last. now how do i fix that so that it will not make such an annoying noise?
If it's rubbing at the top, I've removed 1/4" of the tube where it's rubbing. Make sure tube is properly seated as well in the head.




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post #7 of 12 (permalink) Old 04-30-2014, 09:21 PM Thread Starter
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I just started it up and listened to just about every part of the motor with a stethoscope and it really sounds like the noise is coming from the left side of the rocker box, which is where I always thought the noise was coming from but I don't know why? Its definitely not a pushrod rubbing because there is no noise from those at all
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post #8 of 12 (permalink) Old 05-01-2014, 06:15 AM
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Too bad your not closer, as we'd have you swing by and put an ear to it.
Guarantee we'd address it.
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post #9 of 12 (permalink) Old 05-01-2014, 07:06 AM
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If it were a pushrod tube rubbing, you'd feel it when touching the pushrod tube.

Rockber box noise is usually a loose valve adjustment. Are you setting the tappets at factory .0100" or .0140-.0150" depth as recommended?




__________________________________________
When the going gets weird, the weird turn professional.... ~ Hunter S. Thompson~

R.I.P. Rubberdown. 1971-2012

"Your Jedi Mind tricks will not work on me...... ~Misinlink-2016~

2005 E.G. Classic
S&S 510 cams
Baisley Oil pump spring
CYCO tensioners
V&H Fuelpak
SE 3.5" pipes
K&N filter
Fueling lifters
S&S adj pushrods
Swingarm stabilizer
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post #10 of 12 (permalink) Old 05-01-2014, 10:42 AM
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Don't know if this may help, I replaced cams lifters adj p/r etc. was quiet- til it got hot (warm) then it sounded like you describe. turned out the only thing that was wrong was the cam gear bolt was backing off, retorqued with locktite red. quiet. maybe something to check.

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