UHMW Bearing Inserts

What SE said. The polymer would be extruded out of the race

I've seen mechanics spin the distributor to pump oil into the engine on a start-up or fresh build before starting, I don't see why there can't be an electric drive that does this automatically on start up, much like the fuel pump runs to raise fuel pressure on start up...then you could have a sensor that keeps the engine from starting if minimum oil pressure isn't achieved...

I guess a lot of modern engines have what's called an oil accumulator that is supposed to do just that, hopefully that works as well...

https://honda-tech.com/forums/hybrid-engine-swaps-18/electric-oil-pump-%22prelube%22-motor-before-starting-any-heard-345521/

https://www.vettemod.com/threads/how-to-turn-a-distributor-into-a-oil-pump-primer.8466/

When the Chevy Vega came out,it would not start till the oil pressure reached a certain minimum.It would just keep cranking till the oil light went out.

Good idea,I don't know if other cars use that method or not.

There is at least one steam-powered road rolling engine

like this ⇑ that has <...UHMW...> bearings on its main drive axle, being a substitute for those that would otherwise be made in brass. To give extended temperature range, the material is impregnated with glassfibre.

After viewing SE links, PAI (polyamideimide) seems to be a better choice for engines,and is in use in some engines now.

Thanks SE!

Here is a link to a Scotch Yoke Engine that using a sliding bearing.

The type of material used for this bearing is not published,but I would presume it is a custom type of PAI with reduced friction,as this has already been used in combustion engines(Thanks again SE for the links to the plastics .)

This is a very exciting(to me) video using the Scotch Yoke on a combustion engine.

Very thorough description.

Here is a link to a Scotch Yoke Engine that using a sliding bearing.

The type of material used for this is not published,but I would presume it is a custom type of PAI,which can be modified of for custom purposes.

https://www.youtube.com/watch?v=gskkfFZXwzI

The problem with UHMW bearing/bushings other the what was mentioned, any components that wear, the wore aspect will be embedded into the UHMW, this will build up and become more abrasive, creating more wear.

There is a place for UHMW bushings, but you have to be aware of its properties.

engine failure is eminent. I think you want "imminent" not "eminent."

But to your question. I would wonder about the pounding that the bearing has to take, mainly the connecting rods as well as the mains. Will UHMW withstand that? (That is a real question, because I don't know.) (I'll also have to put "UHMW" in DuckDuckGo to see what it stands for.)

PEI (polyetherimide) or PAI is probably the best choice for my application instead of UHMW.

https://readingplastic.com/high-tensile-strength-plastics/#:~:text=The%20ultimate%20high%20tensile%20strength,tensile%20strength%20of%2021%2C000%20psi.