[BruceP]

Where did you guys bolt your engine ground to the engine? Specifically for an O-320. Any pictures would be appreciated. I tried to search the forums...

 

[aerhed]

At the bottom of the case by the accessory case joint below #3. There should be a fore/aft hole there. Don't forget to remove the paint for grounding.

 

[dedgemon]

vacuum pad stus

unnecessary these days!

 

[chipf]

On my O-320-E2A there is a convenient hole just aft of where the oil dipstick tube threads into the case. I scraped the paint off and used a AN4 bolt to attach the ground line directly from the battery.

 

[airguy]

unnecessary these days!

The vacuum pad might not be necessary for the vacuum pump (I agree with you there!) but it comes in really handy for a standy alternator...

 

[Ironflight]

I've used sump bolts and various holes like the one behind #3 Cylinder on the case. Agree with making sure you clear it of paint!

 

[BruceP]

Thanks guys!