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Water Jacket Expansion relief

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gregoryan
New member
Username: gregoryan

Post Number: 3
Registered: 09-2004
Posted on Tuesday, October 12, 2004 - 10:33 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

It seems as though one of the biggest killers of old marine engines is rust/ sediment expansion under their jackets.
I dont know if this is old news, but, I have mechanically removed loads of shale like material from water jakets.
[I got the idea from my friend at Nth Richmond [Australia] whom builds his own marine steam engines.] He said "Why don't you just drill down through the top to relieve it a bit?, and plug up the holes afterwards?"
Pic Attachment; [Water Jacket Relief 1]
Drilled four 10mm holes in an even stud pattern, then used an extended 6mm masonry bitt which can be easilly angled to drill out all the compressed expanding sediment. I found that an ordinary HSS bit would immediately dull as tho the sediment was rock! It was easy to recognise when the drill hit solid bottom and as the masonry bitt wonít drill iron, it seems verry safe!
Another observation was that there is minimal sediment over the top of the combustion chamber.
With the Blaxland cylinder it was helpful to remove the bottom welch plug for drill access but probably not essential.
Some people will not like the idea of taper plugs in their head, but I donít like the look of exploded jackets! If you were real fussy you could cut the plugs off flush and putty any trace!? Mabee some chemical methods work but it is hard to see and be sure of the results.
Long live our irreplaceable ancient artifacts!!!

image/bmpholes to drill-out jackets
water jacket relief 1 trimmedA.bmp (49.2 k)
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peterogborne
Senior Member
Username: peterogborne

Post Number: 210
Registered: 09-2002
Posted on Wednesday, October 13, 2004 - 05:47 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Certainly a new idea Greg . Getting out that scale /rust is a headache and i have spent many hours just chiseling it out . I suppose it is a matter of being lucky and getting a jacket that is not too far gone . In some cases i have cut a decent sized window in the side ,sometimes a couple . Patched them with an epoxy after

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