ES2 conrod

Thanks for your input Gentlemen.

My apologies for not having replied earlier - some dashed bout of gastric flu.

Well you're both of a frame of mind it can be done, and it seems cold is the way to go.

Not quite up to going down the shed yet, but the attached picture has ideas forming based on what tackle I have. It's near as damn it 70 thou out, and with about 3 thou twist. To my thinking I'll get the bend out first, and one never knows, it might take the twist as well.

I'm in no rush to complete this, and that of fitting the new big end - its the last major job on the bike, and quite looking forward to it, now I see it's feasible.

It may be some weeks, but I will of course let you know how I go on.

Thanks again, Martin

Success! After much checking of the rod as to where the centre of the bend was, I ended up with a setup similar in principal to Davids attached picture.

I packed the conrod level under the big end eye, and on top of my 1/2" plate steel table, close enough to the edge to be within reach of applying pressure by clamping down with a medium bench vice. A 3/4" x 3/4" x 2" steel block was placed across the rod at bend centre to focus the vice jaw pressure.

With no idea how the rod would give, i didnt go mad. I started off applying bend of about 1/16" but it sprang back. I'd measured the rod to be out by .070", so a bend back to centre of .035"

was needed. These are a strong rod, and eventually, clamping to bend the rod to around 1/4" to 5/16" produced the desired result. Checking for squareness between the big end eye and gudgeon pin showed it wasnt far off. Prior to straightening a 1/16" to nothing gap was seen at the gudgeon pin (touching at the top of pin) and when rod was turned over touched at the bottom.