Tool hire

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PAULJ
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Tool hire

Postby PAULJ » Thu Dec 13, 2018 8:45 pm

Hi all, does anyone have or know where I can rent borrow a ridge reamer 3”- 5” please. Loads for penny’s in th US but about £100 new here.
Thanks

philthehill
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Re: Tool hire

Postby philthehill » Thu Dec 13, 2018 10:34 pm

I would respectfully advise that if you need a cylinder bore ridge remover it is time for a re-bore.

Phil


oliver90owner
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Re: Tool hire

Postby oliver90owner » Thu Dec 13, 2018 10:52 pm

Agree with Phil. But an alternative we used to employ, when fitting a new piston (or rings) after a mishap, was a stepped top ring. Likely have to make your own these days!

PAULJ
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Re: Tool hire

Postby PAULJ » Fri Dec 14, 2018 6:05 pm

philthehill wrote:
Thu Dec 13, 2018 10:34 pm
I would respectfully advise that if you need a cylinder bore ridge remover it is time for a re-bore.

Phil
Hi Phil, The step is not excessive. I have pulled one piston out without damage. However there is a step which I want to remove before fitting new rings. If as you say if there is a step it needs a rebore why does such a tool exist ?
Should also say this is an MGB engine not an A engine.

les
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Re: Tool hire

Postby les » Fri Dec 14, 2018 7:04 pm

If you know what you're doing, an engineers scraper could be used to remove the ridge, I would say, the tool you mention along with these other measures are there to put off a rebore for a while!


philthehill
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Re: Tool hire

Postby philthehill » Fri Dec 14, 2018 7:42 pm

Removing the ridge at the top of the bore does not bring the cylinder bore back to correct size whether the bore is standard or at a re-bored size. Also it does not bring the bore walls back to parallel from top to bottom.

Most wear takes place at the top of the bore within the piston ring swept track.

All that a ridge remover does is to allow you to put a new same size piston and rings into the worn bore without the possibility of the top ring hitting the ridge and breaking.

The tool exists as a quick fix/short term measure to alleviate the costs of a re-bore but its use is not a panacea for worn bores.

Fitting new rings with a stepped top ring is another way of overcoming the need to use a ridge remover.

As a rough guide if you can run your nail up the bore and it is stopped by the ridge - a re-bore is required.

The only way to accurately determine bore wear is to measure the bore at several points up and down the bore and at 90 degrees to the piston pin and compare with the original manufactures specification.

https://www.ebay.co.uk/itm/Engine-Cylin ... :rk:9:pf:0

Phil


PAULJ
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Re: Tool hire

Postby PAULJ » Fri Dec 14, 2018 9:29 pm

Thanks Phil. Agree with all you have said however funds are limited at the moment so quick fix it is. Having hot done anything to the engine I’m replacing I thought I’d treat the replacement with new rings and shells. The tool in the link is exactly what I’m after but at £100 for a tool I’ll use once is the reason for the post. The engine is for my camper moggy which poodles around at 50 mph at 2500 revs. I’m quit convinced I don’t need to work to the tollarances you work to. As a rule I’m happy with a ince either way !!!

les
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Re: Tool hire

Postby les » Fri Dec 14, 2018 10:24 pm

However you decide to deal with the step, it would pay to at least glaze bust the bores before you install new rings. You can buy an emery flap disc for an electric drill for this purpose which should do a reasonable job if you don't want the expense of a more professional procedure.



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