going for a .040 over bore .I

Sonic test would be good, What I have found is good machine shops are getting scarce in my area, The guy I am currently using is a one man operation , He says its hard to find help .Not sure what will happen with our hobby in a few years.

Update , Block came in ok after bore to .040 over Machine shop recleaned block replaced freeze plugs and cam bearings , Crank cam in good just polished it up .And all rockers were worn . Have the rings all file fitted. not in yet. Trying to keep as clean as possible. 

KM wrote:

Sonic test would be good, What I have found is good machine shops are getting scarce in my area, The guy I am currently using is a one man operation , He says its hard to find help .Not sure what will happen with our hobby in a few years.

 
Back in the day, on take off the Continental C85-8 in my home built seized up at about 500’ AGL.
Luckily I did a dead stick in an adjacent pasture. No damage except for my nerves and the horses in the field going bonkers.

Upon dismantling the engine I found that a bad oil pump was the culprit.
The cranks mains and throws needed to be ground to 10 under.
Back then there was a local shop that had full remachining equipment for auto engines. The older chap that ran the crank grinding machine never batted an eye lash when I took the  crank in to him and told him what I needed.
That shop and machinist are lamentably long gone. These days I’d be hard pressed to find a local shop that would tackle that kind of work.

Ron68 wrote:

Rudi wrote:

KM wrote:

Sonic test would be good, What I have found is good machine shops are getting scarce in my area, The guy I am currently using is a one man operation , He says its hard to find help .Not sure what will happen with our hobby in a few years.

 
Back in the day, on take off the Continental C85-8 in my home built seized up at about 500’ AGL.
Luckily I did a dead stick in an adjacent pasture. No damage except for my nerves and the horses in the field going bonkers.

Upon dismantling the engine I found that a bad oil pump was the culprit.
The cranks mains and throws needed to be ground to 10 under.
Back then there was a local shop that had full remachining equipment for auto engines. The older chap that ran the crank grinding machine never batted an eye lash when I took the crank in to him and told him what I needed.
That shop and machinist are lamentably long gone. These days I’d be hard pressed to find a local shop that would tackle that kind of work.

 Besides that, the shop would have to be certified to do work on an aircraft engine. There would definitely be airworthiness and product liability issues. Those were the days...... I remember that my project in A&P school was to assemble and get running an Continental A-65. Once I got it done and running, the instructor told two other students, "Okay, now tear it down and mic it out."

 

 
My plane was an experimental that I  built and the rules in Canada are that I could do any work on it without going through the red tape involved with certified aircraft.
I think the same rules are in effect today in Canada and most of the world for homebuilts,  one of the reasons for the popularity of home builts,  notably Richard Vangrunsons RV series.