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Camshaft lifters

Posted By RayCarter18 7 Years Ago
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RayCarter18
Posted 7 Years Ago
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Is there a reason you need to replace the lifters if you replace the camshaft? If so what is the reason or can the used ones be reused.
Ted
Posted 7 Years Ago
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Here’s the link to a past thread giving several other links regarding the subject of used lifters.

http://forums.y-blocksforever.com/FindPost66378.aspx 
.

But in direct response to your question, reusing lifters that have already been run is not recommended for use on a new camshaft.  There are lots of reasons for a new camshaft to fail and using previously run lifters on a new camshaft is just one of the reasons.  The big risk is the lifters turning in the opposite direction in which they had been previously run.  Assuming the tappets are used in the same locations, then if the lobe rake angles have been reversed from one camshaft to another, then lifter rotation also reverses.  Any reduction in crown on the used lifters is also a deterrent for the new cam lobe break-in.  Beyond all that, here’s the link to a list of contributing factors for cam and lifter failures.

Cam and lifter failure causes 



Lorena, Texas (South of Waco)


RayCarter18
Posted 7 Years Ago
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What about Having them re-ground? Does that make them reusable cause it is a lot cheaper than buying new ones ,from my understanding.
aussiebill
Posted 7 Years Ago
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RayCarter18 (6/22/2014)
What about Having them re-ground? Does that make them reusable cause it is a lot cheaper than buying new ones ,from my understanding.

Ray, there will be variable opinions but has been industry practice since the 60,s to re radius the lifters, same as regrinding crankshafts.


  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

RayCarter18
Posted 7 Years Ago
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Forgive my lack of knowledge but what is reradiusing the lifters?
slick56
Posted 7 Years Ago
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RayCarter18 (6/22/2014)
Forgive my lack of knowledge but what is reradiusing the lifters?

The lifters are not flat,  they are machined with a slight convex so that they rotate on the camshaft.


                      
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RayCarter18
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So is there any issue with having them re ground does it take off enough to cause a push rod issue does it hurt them to be reground ?
MoonShadow
Posted 7 Years Ago
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I think the hardest part is finding a machinest that can re radius them or even understands what that is. Sort of a Y-Block thing I guess. Chuck

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Riz
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They're not that expensive, if you are going through the work to pull them out a new set will be worth eliminating one way to wipe out the cam.
Cheap insurance if it avoids tearing it apart again.

Mike Rizzo

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Posted 7 Years Ago
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all flat tapet camed engines hyd or meckanical have convex lifters,even diesel engines.the cam grinders hear in vancuver have a fixture for doing the job.last set i had machined it was 5 dollers per lifter. they ar fusey about which ones they will do


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