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Gallery, Projects and General => How do I?? => Topic started by: kwackers on June 13, 2011, 09:11:25 AM

Title: Filling holes in cast iron castings.
Post by: kwackers on June 13, 2011, 09:11:25 AM

Hi guys,

I've finally got a little time back in my shop and gone back to my Stuart No4.

I made a start on the flywheel, but as I turned it to size I found a 'blow' hole on its perimeter. Only a couple of mm but too deep to machine out. I'd like to polish the rim rather than paint.
Does anyone have any good suggestions for some method of filling this? Doesn't have to be perfect (I'll stop the engine with the hole underneath  ::) ) but any suggestions that will improve the cosmetic appearance beyond that of a black hole is welcome.

Steve.

Title: Re: Filling holes in cast iron castings.
Post by: Davo J on June 13, 2011, 09:23:54 AM

I found what looks like solder or lead on a small spot on the knee way of my old shaper and found the same thing on a small imperfection on my Chinese thicknessor table. Not sure how it's put in there but it is hardly noticeable.

Dave

Title: Re: Filling holes in cast iron castings.
Post by: John Swift on June 13, 2011, 09:34:22 AM

Hi Dave ,

how about a diy filler , mixing some fine cast iron metal particles with a two part epoxy glue


 John

Title: Re: Filling holes in cast iron castings.
Post by: Jasonb on June 13, 2011, 10:44:48 AM

Drill it out and loctite a tight fitting bit of CI into the hole.

Nearest looking filler is plastic paddings "plastic metal" this is like car body filler but has iron powder as the filler, JB weld is a bit too light a grey.

Jason

Title: Re: Filling holes in cast iron castings.
Post by: srm_92000 on June 13, 2011, 12:51:36 PM

Hi Steve,

How old is the engine?
when I bought my 10v kit recently I found this beneath the surface of the cylinder -
(http://www.martinnet.co.uk/Cyl_web2.jpg)

So I sent a polite email & pic attached explaining that I didn't know if this would affect performance etc. and they immediately replied asking for my home address and sent me a new casting which I had in just a few days :D
Amazing service, maybe worth a go.

Steve - M.

Title: Re: Filling holes in cast iron castings.
Post by: jim on June 13, 2011, 12:57:07 PM

at work they just use some metal filler, pretty good colour match too!

Title: Re: Filling holes in cast iron castings.
Post by: kwackers on June 13, 2011, 01:09:48 PM

It's quite old - I bought them at a club auction, could be early 80's...

I think some form of filler will be fine, unlike a cylinder it's entirely cosmetic so shouldn't be an issue. Just need a good colour match...

Title: Re: Filling holes in cast iron castings.
Post by: kvom on June 13, 2011, 04:31:23 PM

Quote from: Jasonb on June 13, 2011, 10:44:48 AM

Drill it out and loctite a tight fitting bit of CI into the hole.

Nearest looking filler is plastic paddings "plastic metal" this is like car body filler but has iron powder as the filler, JB weld is a bit too light a grey.

Jason

This

Title: Re: Filling holes in cast iron castings.
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Title: Re: Filling holes in cast iron castings.
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