Morel Rebuild Information

General:

  1. Contact one of our dealers to obtain pricing and get the product rebuilt.
    The rebuild price is roughly 50% to 60% of a new price.
  2. We rebuild most Morel mechanical roller lifters.
  3. We do not rebuild hydraulic lifters.
    The tolerance between the piston and I.D. body is so small, that we found scoring and debris of the body cylinder wall requires too much time to rebuild the hydraulics. Note: If your engine has a cam failure or engine failure, the hydraulic lifters should be replaced. The engine should be thoroughly cleaned, including the lifter oil galleys. Just installing new lifters, without proper cleaning of the engine, can cause the new lifters to fail because of dirt and metal debris from the engine failure.

Rebuilding Process:

  1. The lifter set is inspected to insure that the parts match up with the part number and description.
  2. The parts are measured to make sure they can be rebuilt.
    If a lifter body is cracked, we replace it and charge additional for the new body.
  3. The lifters have the fasteners, tie bars, axle clip, axle, needles, and wheel removed.
    These parts are discarded.
  4. The bodies are examined for cracks or any odd wear points.
  5. The bodies are micro polished, which removes .0001".
  6. New axles, wheels, needles, stainless tie bars, and fasteners are reinstalled.
  7. The assemblies go through final inspection and are shipped back to the dealer.

Installing Rebuilt Lifters:

  1. Do not wash in any solvent. Wipe the parts off with a lint free towel.
  2. Use 10W30 oil and lube the O.D. of the body and wheel.
  3. Make sure the lifter-to-bore clearance on cast iron blocks is: .0015" - .0017".
    On aluminum blocks that oil the lifter (LS Series) the clearance is .0012" - .0014".
    The aluminum block will have a higher rate of expansion and that is why the clearance is tighter.
    Both of these measurements are at 70 Deg F.

I hope that you find this information helpful.
John Callies