compression diminishes to nothing from 1 to 4

[Paul's Zuki]

I measured roughly the piston size and it is 55mm. what size ball hone would be good? I found one on ebay that is 55-57mm would that be sufficient?

Or could I use those 3 stone hone tools?(they have this available at the auto store near where I live)

[Nessism]

Ball hone is what you want. http://enginehones.com/

[Paul's Zuki]

what size should I get and what grit? current bore is about 55mm


They have a 57mm 240 grit. If I order this these usually come oversized correct? So I just order the exact corresponding size, Correct?

[Paul's Zuki]

nevermind just found all the info i needed on that website. thanks.

[sparki]

i, personally, would get an engineering shop to do this for you...... easy to mess it up and then you'll need oversize pistons if you do...

[Paul's Zuki]

i, personally, would get an engineering shop to do this for you...... easy to mess it up and then you'll need oversize pistons if you do...

I actually know how to hone. I was once an industrial honer working on Sunnen & General Hone machines. I just wasn't sure how these ball hones were measured, giving some more play. well, with that said, I did hone out the bores and this is what I found. On cylinder 1 it looks like it has some scoring and cylinder 4 just some spots. I can't feel those, only in cylinder can i feel it. See photos below. What do you think? usable or am i needing a new head?

Cylinder #1




&

Cylinder #4


Also found that the ring gap was oversize by about 5-10mm.

[gearhead13]

5-10 mm oversize ring gap? Are you sure you have the proper rings for that?
Thats where your compression is going.

[Nessism]

Those cylinders look bad to me. Ebay?

[Paul's Zuki]

that's what I was afraid of. ebay it is. damn. I just dropped about another $100.00 on gaskets and stuff and now this. damnit. damnit. damnit. Deep breath. Oh how I love you GS.

How will I even know if the one off ebay is any good. so far have found 3 and 1 says its scored, so I'll stay away from that one.

Other option how easy not easy is it to press out bore and put in a fresh one? and I know this isn't anything I can do at home, but for those that have gone thru this, what?

[mike_of_bbg]

Do some searches on removing cylinders; it's been covered. If you're not married or you have a very understanding wife I think they fall out after a while at 400 degrees in an oven. Or you could just use the whole new cylinder block.

[niclpnut]

ouch...yeah double check your ring size.

Nic

[Paul's Zuki]

Okay just ordered a cylinder head that the seller said the bores were in very good condition and pictures proved it as well. We will see once it gets here and I have ordered some new piston rings and know exactly what the tolerances should be. Hopefully this will resolve my compression woes.

[Nessism]

This is almost too cheap to be true... http://cgi.ebay.com/ebaymotors/82-Su...item4cf82b943b

[Guest]

5-10 mm??
Are you serious?

Was it already bored over?

[Paul's Zuki]

5-10 mm??
Are you serious?

Was it already bored over?

bear with me, I'm new at this. The rings had a gap that measured about 4mm, I mean. pretty good size gap though