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Anonymous Posted on Mar 14, 2012

Whats the procedure to adjust pushrods on a Harley evo motor equipped with solid lifters

1986 evo motor with hydraulic tappets converted to solids & crane cam installed.

1 Related Answer

Anonymous

  • 4565 Answers
  • Posted on Mar 20, 2011

SOURCE: trying to find correct method

If your Shovelhead has solid lifters, you set them exactly like you would set the tappets on an Ironhead Sportster. With the engine stone cold, Bring either piston to top dead center ON THE COMPRESSION stroke. Both valves on that cylinder should be closed and the tappets on the heel of the cam at this point. Now, adjust the pushrods longer until you can no longer turn them with your fingertips. Now, back them back down until you can barely spin them with your fingers. Lock the locknuts down. Then bring the other cylinder to TDC COMPRESSION STROKE and adjust those pushrods.

You are adjusting for Zero backlash just like on an Ironhead Sporty. As the engine heats and the cylinders and head expand, they do so away from the cases which gives you more backlash the hotter they get. If you get the pushrods too tight, when the engine cools down, they'll hold the valve open just slightly making the engine difficult to get started.

Now, if you have hydraulic tappets, with the engine cold, back the pushrods off until they are loose. Bring them back down to zero backlash and then come down four additional turns and lock the locknut. Wait until the tappet bleeds down and you can spin the pushrod before you turn the engine.

Good Luck
Steve

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I would like to set the tappets sound like a diesel motor

Depending on the engine will determine if you can "adjust the tappets". Older cars had solid lifters so they had to be adjusted. Newer cars have hydraulic lifters and need no adjusting.

If your tappets sound like a "diesel motor" it may be they are not getting oil - or the center of the tube that provides oil to the tappets are blocked.

Need to remove the valve cover and run the engine just long enough to see if oil is coming out of the lifter. If when you remove the valve cover and the lifters look dry then you have a "lubricating problem" and you need to get it taken care of immediately.
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How do i adjust pushrods on a 1995 harley davidson dyna

That should have hydraulic lifters and can be a bit noisy. If it has solid lifters then adjustment must be done by removing the pushrod covers. Would be best to get a manual and follow a writen procedure.
Aug 27, 2014 • Motorcycles
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I have a 2000 Road King 88 inch Twin Cam. It has T-7011 V-Thunder adjustable pushrods. I am putting in new stock Harley lifters. How do I adjust the pushrods. How many turns from zero lash?

Stock lifters often allow valve noise. Consider velvet touch or Jims' lifters AND lifter blocks. Adjustable push rods are okay.
Adjustment: I prefer TOTALLY dry lifters get the lifter at its lowest point and FULLY collapse the lifter. then turn looser by 1 to 2 1/2 turns. What this does is allow for a loss of oil pressure without engine destruction. This procedure is essentially the opposite of the normal procedure.
Many HDs have intermittent valve tapping and we have traced to the lifters. HD says "It's a Harley", but a valve tap ruins the whole ride.
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How do i adjust my rockers on the rear jug took apart 2 fix base gaskets on rear jug

If your bike is equipped with the Evolution engine there is no adjustment on the rocker arms, the engine is equipped with hydraulic tappets. The pushrods on the Big Twin Evo engine are color coded and go in a particular position. They are different lengths. The blue color coded pushrod is the rear intake pushrod, the purple color coded pushrod is the exhaust pushrod. The pushrods for the Evo Sportster are all the same and there is no adjustment on those eiher provided they are stock.

Now, if you are working on something other than an Evolution engine or you have aftermarket pushrods, please repost and I'll tell you what I know about the valve adjustment for your engine.

Steve
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Trying to find correct method to set or adjust tappets on my 1973 Harley-Davidson Shovelhead engine which has a stroker motor and solid lifters

If your Shovelhead has solid lifters, you set them exactly like you would set the tappets on an Ironhead Sportster. With the engine stone cold, Bring either piston to top dead center ON THE COMPRESSION stroke. Both valves on that cylinder should be closed and the tappets on the heel of the cam at this point. Now, adjust the pushrods longer until you can no longer turn them with your fingertips. Now, back them back down until you can barely spin them with your fingers. Lock the locknuts down. Then bring the other cylinder to TDC COMPRESSION STROKE and adjust those pushrods.

You are adjusting for Zero backlash just like on an Ironhead Sporty. As the engine heats and the cylinders and head expand, they do so away from the cases which gives you more backlash the hotter they get. If you get the pushrods too tight, when the engine cools down, they'll hold the valve open just slightly making the engine difficult to get started.

Now, if you have hydraulic tappets, with the engine cold, back the pushrods off until they are loose. Bring them back down to zero backlash and then come down four additional turns and lock the locknut. Wait until the tappet bleeds down and you can spin the pushrod before you turn the engine.

Good Luck
Steve
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1answer

I have a 99 1200s, After the motor gets hot I have lifter noise in the top end,I was told not to worry about it. Is there any adjustment in the rocker boxes??Or could my motor have solid lifters?

Your engine is equipped with hydraulic tappets and there is no adjustments on them. As the various parts of the valve train wear, the plunger in the tappet takes up the slack. What you are hearing is probable a little clearance in the rocker arm bushings and the shafts they ride on. This is typical of an overhead valve engine design like the Harley-Davidson engine. If it gets too bad, you can take the rocker boxes and lower rocker plate off the engine without removing the heads and have the rocker arm bushing replaced and new shafts installed.

Good Luck
Steve
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I put drag pipes on,now crank position sensor

There is no adjustment to the valves on your Evo Sportster. The tappets are self adjusting hydraulics unless someone has changed them. Take a look at you pushrod tubes, are they should be one-piece tubes.

Sorry but I cannot explain why your crank sensor keeps giving trouble. I know nothing of the electronics on the newer bikes. But I do know that the last Sportster that used solid tappets was the 1985 model Ironhead. All Sportsters since have hydraulic tappets and require no adjusting.
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