10 replies to this topic

[n00b]

Hi all, i saw this on the very end on the bottom half of the shell. It looked knackered so i ripped it off. Where can i get one of these from? iv tried searching for it on minispares web site but no luck. Also how does it attach onto the bottom half of the clamp thing, Adhesive of some description? which one? Many thanks ERic

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[Ethel]

Buy an engine gasket set all the seals, lock tabs and gaskets will be in it.

I'd also use new bearings if you've gone to the trouble of a full strip down.

If you replace the rings it could do with honing.

[n00b]

Buy an engine gasket set all the seals, lock tabs and gaskets will be in it.

Thank you!

I'd also use new bearings if you've gone to the trouble of a full strip down.

I am

If you replace the rings it could do with honing.

Whats honing?

Many thanks! ERic

[Ethel]

If you fit new piston rings you should get the bores honed so that they bed in properly - it's a machining process that scores a diamond pattern on the cylinder walls.

How did the crank journals and shell bearings look? If there's evidence of wear you might want to consider getting them ground and using different sized bearings to match.

Edited by Ethel, 23 September 2007 - 06:40 PM.

[Big_Adam]

It's called a half moon seal.

Honing is where you scrap a tiny amount off the bores to remove the glazing and give you the crosshatching on the bores again.

If your engines done a fair few miles then it's a good idea.

If the bore is bugged then you get it bored out.

You'll prob be fine. Seen a 1909 block that wasn't even glazed.

edit

Damn, beaten by ninja Ethel.

Edited by Big_Adam, 23 September 2007 - 06:42 PM.

[n00b]

big end bearings looked fine, with hardly any badly worn marks. Only trouble i could find is the main bearings, They had deep scratches and heavy signs of wear. at some parts the bronze coating couldnt be seen and the 'steel' undercoating was visable. Here is a pic of the crank. Think it might need to be reground?  DSC00026.JPG   675.02K   1 downloads
 DSC00028.JPG   426.57K   2 downloads ERic

[Big_Adam]

Get on to mini sport. They do .... reground cranks with bearings fairly cheap.

OR go to a local machine shop and they can check if it's still all good to use. Cost £5 to check it....well did for me,.

[Ethel]

For all the effort involved in a rebuild I'd take the crank into a machine shop 'n have them look at it.
Having the mains reground is a small price to pay for a nicer and longer lasting engine. If you can I'd take the block in as well get the bores measured and see what it'd cost for a quick dip in their tank of chemicals.

In any case you should remove the core plugs and thoroughly clean all the oil ways.


it's fun spending someone else's money for them

[Big_Adam]

Oh, also the half moon rubber seal DOESN'T have any sealant on it. It's held in place by the parts around it.

[n00b]

ok il go to a machine shop tomorrow and see how much it will cost for it to be reground (if needed) and to have machined bearings, and for the bores to be checked. The bores look ok. i only bought the engine as it was cheap but only bad thing is it was already in bits!

[n00b]

Oh, also the half moon rubber seal DOESN'T have any sealant on it. It's held in place by the parts around it.

Ok, thanks!