It has hydraulic roller lifters.
hydralic
solid lifters at a 012-inch clearance
The hydraulic lifters do not require adjustment nearly as often as solid lifters.
Hydraulic lifters would be STOCK from the factory. On the 84 engine.
The International Harvester (IH) 345 engine is equipped with hydraulic lifters. These hydraulic lifters automatically adjust to maintain the proper clearance between the lifter and the pushrod, which helps to reduce engine noise and wear. This design contributes to smoother operation and less maintenance compared to solid lifters.
Yes it does. Chevy did not use solid lifters in that engine.
Assuming solid lifters (as opposed to hydraulic, self-adjusting lifters) you could burn valves if the lifters are adjusted too tight or have excessive valve clatter if the lifters are adjusted too loose.
You could take off a rocker and try to push down on the pushrod. You'd be able to feel the spring in a hydraulic lifter, but not on a solid lifter.
YES, Unless someone has installed a solid lift cam sometime are another.
It has hydraulic lifters that are known to get noisy. Mazda sells a shim set that can be installed under each lifter to reduce clearance so that the lifters don't require as much pump-up travel. The lifters are located in the ends of the rocker arms, replacing or shimming them requires the removal of part of the intake plenum. You can also buy new lifters in the aftermarket for about $20. each, but there is 12 so it's not exactly cheap.
No, not all small block lifters are the same; they can vary based on design, materials, and intended use. Different small block engines, such as those from Chevrolet, Ford, or Mopar, have unique specifications that affect lifter compatibility. Additionally, lifters can be hydraulic, solid, or roller types, each offering different performance characteristics. Therefore, it's essential to choose the right lifter for your specific engine build and performance goals.
I guess that you are talking about a hydraulic lifter for an auto engine. There is no repair for these. They can be converted to "solid" lifters or used as paper weights.