[Vwdiesel] Re: Bolt hole mania and assembly lube

[Justin and Chelly Bennett]

Local aircraft engine overhauler uses a mix of stp, lubriplate, and non 
detergent oil as an assembly lube.  The problem with using just straight 
oil (he feels anyways) is that if the engine sets for any length of time 
after assembly with straight oil that it tends to leak out of the 
bearings leaving a dry bearing for the first start.  A word of caution 
on STP and other friction reducers.  Don't get them anywheres you need a 
bit of friction.  Never use STP on the cylinder walls or rings, they 
will never seat properly.  A former employer had a customer who was a 
dealer for an oil inhancer, Slick 50 I think, he decided to use it in 
his Cessna 210.  Seems the spring/drum style starter drive requires a 
certain amount of friction to work and the snake oil done like 
advertised.  Put the neatest golden brown friction eleminating coating 
on the drum.  So be careful with the stuff.
Justin
 

>One race car engine rebuilder I got tutored from bought STP.  Never as an 
>oil additive, but rather as an assembly lube.  
>