damage from misadjusted pushrods?
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Road Captain
Joined: Nov 2007
Posts: 517
Likes: 6
From: Ottawa, ON
damage from misadjusted pushrods?
Can't believe these epic failures! I guess I shouldn't consider myself "an experienced home mechanic" anymore 
I've adjusted pushrods on a freshly rebuilt '94 evo, after a thermal break in, when I noticed a loud tappet noise.
I made them nice "finger tight", totally forgetting about bleeding the tappets. As a result I had tappet pistons all the way up.
So, when the engine is cold, they run nice and quiet, but as it warms up, the tappet noise gets definitely way too loud.
To make the matter worse, I've done 100 miles like that, wondering what the hell is the noise about.
So, my question is: should I look for some damage at this point, or should I simply adjust them properly, and then if I don't hear anything suspicious anymore, just assume that everything is fine?
I've adjusted pushrods on a freshly rebuilt '94 evo, after a thermal break in, when I noticed a loud tappet noise.
I made them nice "finger tight", totally forgetting about bleeding the tappets. As a result I had tappet pistons all the way up.
So, when the engine is cold, they run nice and quiet, but as it warms up, the tappet noise gets definitely way too loud.
To make the matter worse, I've done 100 miles like that, wondering what the hell is the noise about.
So, my question is: should I look for some damage at this point, or should I simply adjust them properly, and then if I don't hear anything suspicious anymore, just assume that everything is fine?
Tourer
Joined: Jun 2006
Posts: 291
Likes: 1
From: Burleson, TX
RE: damadge from misadjusted pushrods?
Certainly, you should attempt to adjust them according to the specific pushrod manufacturer's instructions. \\; If this cures the noise, count it as an inexpensive lesson learned.
Road Warrior
Joined: Apr 2007
Posts: 1,354
Likes: 1
From: S.W. Florida
RE: damadge from misadjusted pushrods?
If it was my bike, I'd pull the pushrods \\;out to make sure they were not bent. I would then turn the engine over looking to \\;make sure that the lifters were pumped up. \\;I agree with 4X4's advice, then readjust to the specific specs on your pushrods.
 \\;
My way is a little more work and time consuming, but it insures that everything is right and done correctly. Make sure to allow enough time for the lifters to bleed down on the front cylinder before starting on the rear. If all goes well then lesson learned. If not, then maybe a lifter or two has collapsed and needs to be replaced. Good luck with your decision and keep us posted.
 \\;
My way is a little more work and time consuming, but it insures that everything is right and done correctly. Make sure to allow enough time for the lifters to bleed down on the front cylinder before starting on the rear. If all goes well then lesson learned. If not, then maybe a lifter or two has collapsed and needs to be replaced. Good luck with your decision and keep us posted.
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adjust, damage, evo, harley, long, misadjusted, misadjutment, push, pushrod, pushrods, rods, shovelhead
