Anyone ever hone cylinders DIY style?
 

I am just about to take my bmw block to the machine shop for a hone and the DIYourselfer in me started reading about doing it at home.

I've read the flex hone (dingleberry) hone is better to use than the 3-stone job. Not sure which grit to use or what diameter. 92mm bore on my motor so I'm guessing a 3.75" hone.

Anyway, I'm sure a few of you badasses have done it. And I always love a reason to buy another tool!!!

Used a flex hone on my nikasil cylinders when I rebuilt my 3.2 in the 911!

I rebuilt 2 engines and honed myself. The 1st was a 71 Dodge Colt. I sold it shortly after the rebuild, I knew the person I sold it too and it was still running at 200K miles, the engine was rebuilt @ 115K miles.

The second was a 84 Honda Civic that busted it timing belt and ate itself. I sent the head out for new valves and rebuild and then rebuilt the bottom end. I honed the cylinders on that one myself too. I put 70K VERY HARD miles on the car before I sold it with 200K miles on the clock.

You probably know this already but, if I remember correctly do not get too aggresive with the tool. Just rough up the surface for the new rings to seat back in.

Good luck!

Yes, the flex hone is way better than the 3 stone. i tossed all mine in the trash! Qusetion though are the cylinders alusil or nickasil? If so, you cant hone them the traditional way with a flew hone.