About cylinder honing

[Niander101]

I will freak out with the Seagulls! Even the crankshaft was dark brown, as if it had become glowing red from the heat at some point in its life.

Been in the oven mate

[Stelios_Rjk]

Creative!!! But it needed the hell to see results!

[Stelios_Rjk]

The scratches..





And some pitying. That doesn't really matter as it is below piston rings.





Dead or some more honing, 1:10 oil and that's it?

[1650bullet]

Give it some more honing. If you were to use your honing tool on such a rusted and pitted bore you would of wrecked the stones on it. Use some course emery paper using the method i showed you with the sponge.

[Stelios_Rjk]

Imagine that I honed a little bit this bore. OK, I will try your method.

[1650bullet]

Thats looks pretty rough in that bore. Try 120 grit then 240 grit. See how it looks after you do those 2 and post up a pic.

[david doyle]

Stelios, you need a patio lathe and you need to find out what piston you can bore gulls out for Must be a common piston out there that you can adapt all the ultra trashed blocks to. Imagine NEVER having to admit a gull is garbage. Price of cranks,gear boxes and flywheels will go thru the roof. Or maybe you could be "that guy" that sleeves gull blocks.

[Stelios_Rjk]

Yes it rough but the picture may show it even rougher than it really is. 120 or 240? I would use 400 grit or higher. Do you think that this would be a good idea?

No David.. I don't think that I would be "that guy"

[Horsley-Anarak]

Yes it rough but the picture may show it even rougher than it really is. 120 or 240? I would use 400 grit or higher. Do you think that this would be a good idea?

No David.. I don't think that I would be "that guy"

I hone with 120 grit ball hone, this was recommended by the hone manufacturer.

400 is way too fine, but do not overdo it with the coarser grit.

H-A

[Collector Inspector]

Fix Hellas? Now why can I not get this locally?

Flexhone if ya can get one is the best. They last for a lifetime.

If the piston came out, a light hone and check your rings. Pretty simple, just measure the basics. If the piston looks ragged best to get a new one aye. Sometimes most, the rings once freed just fit again?

One thing to note is that the bore is straight, top to bottom. No need to get carried away with that if measures "IFFY" ok?

Kinda a Gull Thingy

Nothing special as we are dealing agricultural here

B

[Stelios_Rjk]

Fix Hellas is not so famous, I think it sells locally.

I get the other tool with the three stones. How am I supposed to measure the rings gap when standing inclined to the direction that the piston moves? I mean the gap.

About straightness of the bore? By trying using it on a power head will I check?

[Stelios_Rjk]

The worst point, over the exhaust outlet.


And another view of the bore.


I fabricate something like 1650bullet said. Put the cylinder underwater and rasp with 280 grit. Couldn't bare to use something coarser. So after some rasping, checking etc decided that it was enough. The deepest scratches (2 or 3) wasn't too deep anymore. Continued with the honing tool and then it was time for a test. Removed the cylinder of a power head with a lot of compression and put this one on. It fired after 2-3 pulls! I didn't let it run for more than thirty seconds. I am a very polite person. More than 30 seconds and all neighbors will be deaf. No water circulation or exhaust
Then spin a little bit the flywheel and surprisingly feel compression equal or even better than the previous cylinder had. I wasn't expecting honing to be so rejuvenating!

I tried to place in the bore new rings, from army I think. But couldn't get in. The other rings I have, have inclined gap and still can't figure out how to measure it. My compression gauge is somewhere in Sunderland and will come in a couple of weeks. Until then conclusions by... feeling! And 10% oil rocks!!!

[Niander101]

Unfortunatly and surprisingly I don't think they ever made any bigger pistons for rebores?
Unless Hepolite made some?

[1650bullet]

You were better to do as i mentioned instead of using a hone. You would of wrecked the stones on your hone trying to clean the cyl, and there an expensive tool.What you have done has worked out good for you. Good work. Here is a couple of pics of how your rings may look when sitting in the bore. Do you ring gaps that look like this.If so, this is how you should measure them.

[Stelios_Rjk]

Thanks Kean. I didn't care a lot about the cyl hone. It costs 7euro and it's inappropriate. The stones are 3cm long and they hit on the ports while honing. I have to buy a serious tool. At least the result was rewarding.