Can't compress new lifters?

Discussion in 'Engine Topic' started by Mottley's79, Nov 10, 2010.

  1. Mottley's79

    Mottley's79 Veteran Member

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    May 22, 2010
    New Brunswick, Canada
    I am replacing all the lifters and the intake manifold gaskets in my 1999 4.3 Vortec V6. The lifters started making alot of noise and when I pulled it apart they were either fully or semi collapsed due to sludge. I cleaned one out and the plunger now moves freely. Instead of cleaning all of them, I decided to buy some new ones. They are Mahle Clevite brand, made in USA and I can't compress the plungers by hand at all. Is thnis normal. I need to know 'cause I really need this motor back together! Thanks in advance!
     
  2. badazz81z28

    badazz81z28 Veteran Member

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    May 4, 2001
    Las Vegas, NV

    Are they hydraulic? If they are the right part # and they ALL have this issue, I wouldnt worry, I would really make sure they were the right OEM lifters.
     
  3. meangreen73

    meangreen73 Veteran Member

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    Feb 16, 2008
    Pittsburgh
    On a brand new lifter out of the box u should be able to push the plunger in. When there full of oil and pumped up u shouldnt be able to push them in.
     
  4. Mottley's79

    Mottley's79 Veteran Member

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    May 22, 2010
    New Brunswick, Canada
    They are hydraulic roller and they are brand new. I checked three or four of them and they were all the same. They look exactly like the old ones that came out.
     
  5. Louich

    Louich Veteran Member

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    Mar 8, 2004
    Arthur, Ontario
    stick em in and drive on
     
  6. Damon

    Damon Veteran Member

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    Nov 16, 2000
    Philly area
    Agreed. Stick them in and fire it up. The spring that holds the plunger up will take a fair bit of force to overcome by hand, even with no oil in the lifter. When you put them in and crank down on the rocker arm nut they'll compress.
     
  7. Mottley's79

    Mottley's79 Veteran Member

    104
    0
    May 22, 2010
    New Brunswick, Canada
    Thanks for all the replies guys. I emailed Mahle and they said it is completely normal. I installed and lubricated the valvetrain and the rocker nut did compress the lifter. Tomorrow first thing, the intake goes on and hopefully I'll be burning fuel before dark!
     
  8. Louich

    Louich Veteran Member

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    Mar 8, 2004
    Arthur, Ontario
    and tires :)
     
  9. BondoSpecial

    BondoSpecial Veteran Member Lifetime Gold Member

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    Sep 20, 2004
    Southern Maryland
    I have never been able to compress new or used lifters by hand, they must be pretty hard to compress or I'm just weak.
     
  10. meangreen73

    meangreen73 Veteran Member

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    Feb 16, 2008
    Pittsburgh
    when i said by hand i didnt mean literally by pushing it in with my finger. If u take a push rod and stick it in the plunger you can compress a new lifter. I always soak my lifters in oil and pump them up before i put them in
     

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