From:Dave Molnar
Subject:RE: RE: RE: Bearingless rods Date:Tue Jun 23 12:09:39 2015
Response to:5799
Hi Barry,
Aluminum has much less embed-ability - this is absolutely true. It is mandatory to use a modern oil filter with all aluminum bearings. (why wouldn't you anyway?) As you can see in the picture there are absolutely no marks in the bearing surface and honing us perfectly visible and worn in as intended. Micrometer measurement of journals do not show any appreciable wear and although not appearing freshly ground are shiny, free of defcts and perfectly serviceable. As long as there is a good supply of filtered oil there need not be worry. It has worked very well as have countless small engines such as Briggs & Stratton, Techumseh and even Kohler have done for decades. In my small engine shop years ago I would routinely have abused equipment brought in for service and poured out awfull oil when it was even present. An oil changes and tune up was all they needed. The idea is not new. A great benefit I have seen is less crank journal wear and because the material is tougher and can not displace or "pound out" in extreme conditions like softer materials can. As many know I'm not a babbit fan but this does not mean that babbit is a bad thing. It has been used forever with excellent success. I believe that super clean assembly and good clean lubrication is the biggest key to langest possible bearing life no matter what the bearing material. My post is meant to show that there are other options that are very affective. There are a number of bearing materials used these days and each has its pluses and minuses.


Looks good but wouldn't the down side be less "embed ability" as compared with
babbitt as the crank journals are what we want to protect.
Hope the picture works this time!

Hi all, Just doing an inspection on things. This is the condition of the bearing
surface on my aluminum "bearingless" rods after over 15,000 miles of mostly
high speed highway riding. Its time for glaze break and a set of rings maybe but
that's about it (thankfully...!)