Engine problem pushrod noise
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Road Captain
Joined: Mar 2007
Posts: 541
Likes: 3
From: Houston
Engine problem pushrod noise
I had a lifter go bad in my 98 Evo engine....just the front cylinder Exhaust.
I replaced the lifter and verified the adj pushrod was not bent and re-stabbed it.
now the pushrod seems to lean way to close to the wall going up to the rocker? the intake pushrod is still perfectly centered.
you can feel the clanking when u grab the pushrod cover. I have not revved the engine passed idle due to this issue so do not know if it lacks power or backfires, etc from this cylinder (as it did when the lifter cracked)
What should I be testing or looking for?
the angle of the pushrod leans towards the engine vs in center or away from engine. it seems centered fron to back just not side to side. I did use alignment tool for the lifter housing.
I replaced the lifter and verified the adj pushrod was not bent and re-stabbed it.
now the pushrod seems to lean way to close to the wall going up to the rocker? the intake pushrod is still perfectly centered.
you can feel the clanking when u grab the pushrod cover. I have not revved the engine passed idle due to this issue so do not know if it lacks power or backfires, etc from this cylinder (as it did when the lifter cracked)
What should I be testing or looking for?
the angle of the pushrod leans towards the engine vs in center or away from engine. it seems centered fron to back just not side to side. I did use alignment tool for the lifter housing.
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Joined: Jul 2015
Posts: 8,538
Likes: 1,646
From: SF Bay area
Couple of things you can do...
Drill out the top 1" or so of the PR tube to 5/8" for more clearance.
Try adjusting the PR 1/2 turn in or out... some are not concentric and will be at a slight angle when tightened. Sometimes that half turn makes them straight again.
__________________________________________________ ____
For ROCKOUT information & purchasing please click the LINKS below... For all Twin Cams and Evo Big Twins & Sporsters
Drill out the top 1" or so of the PR tube to 5/8" for more clearance.
Try adjusting the PR 1/2 turn in or out... some are not concentric and will be at a slight angle when tightened. Sometimes that half turn makes them straight again.
__________________________________________________ ____
For ROCKOUT information & purchasing please click the LINKS below... For all Twin Cams and Evo Big Twins & Sporsters
__________________
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Ordering & info http://www.rockout.biz On ebay! ... CLICK HERE
Also on amazon.com...
Imitated, never equaled... ROCKOUTS!
Seasoned HDF Member
Joined: Sep 2008
Posts: 14,065
Likes: 11,083
From: San Diego, CA
I had a lifter go bad in my 98 Evo engine....just the front cylinder Exhaust.
I replaced the lifter and verified the adj pushrod was not bent and re-stabbed it.
now the pushrod seems to lean way to close to the wall going up to the rocker? the intake pushrod is still perfectly centered.
you can feel the clanking when u grab the pushrod cover.
What should I be testing or looking for?
the angle of the pushrod leans towards the engine vs in center or away from engine. it seems centered fron to back just not side to side. I did use alignment tool for the lifter housing.
I replaced the lifter and verified the adj pushrod was not bent and re-stabbed it.
now the pushrod seems to lean way to close to the wall going up to the rocker? the intake pushrod is still perfectly centered.
you can feel the clanking when u grab the pushrod cover.
What should I be testing or looking for?
the angle of the pushrod leans towards the engine vs in center or away from engine. it seems centered fron to back just not side to side. I did use alignment tool for the lifter housing.
Of course, it's possible the rocker arm could have been damaged (bent, tweaked) when the lifter "went bad". Not sure what you mean by "went bad". Your new issue sure seems like it's got to be related to the lifter failure..
That leaves cam (least likely), pushrod (most likely), or rocker arm (possible).....
Good luck with the fix...
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Road Captain
Joined: Mar 2007
Posts: 541
Likes: 3
From: Houston
I just played with it again..clearenced the tube a little as the pushrod was hitting part of it due to the angle the rod is in the tube.
I can still here tapping in the top end if I push on the pushrod cover to keep the fat part of the adj pushrod.
So I guess I will replace the rocker first...when i'm looking at the way the rocker hits the top of valve looks a little different than the intake side as far as how flat it is on it...
who knows just easter egging at this point.
When I revved it up it did not sound to bad just hearing tapping noise.
I can still here tapping in the top end if I push on the pushrod cover to keep the fat part of the adj pushrod.
So I guess I will replace the rocker first...when i'm looking at the way the rocker hits the top of valve looks a little different than the intake side as far as how flat it is on it...
who knows just easter egging at this point.
When I revved it up it did not sound to bad just hearing tapping noise.
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