Mr K
Posted a lot
Posts: 2,993
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Feb 14, 2007 22:54:06 GMT
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a guy on a reliant forum I'm on is looking to run some copper head gaskets off (he has access to a cnc lazer cutter) but someone has raised the question of:
Reliant engines have aluminium blocks and heads, with a wet steel liner. this liner sits between 0.002 and 0.006 thou high of the deck of the block.
Your opinions please...Will it seal OK?
my opinion is that it will seal, OK, and the gaskets will be ok to remove and reuse on the same engine so long as the liners don't move? or is 0.002-0.006 to little to worry about?
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Feb 14, 2007 23:02:43 GMT
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 I reckon it'd be OK but I certainly wouldn't want to re-use a head gasket.
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Mr K
Posted a lot
Posts: 2,993
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Feb 14, 2007 23:04:34 GMT
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I reckon it'd be OK but I certainly wouldn't want to re-use a head gasket. cool, the wonders of a copper head gasket is that you can qwench them and re use them, and that they are harder to pop... |
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Feb 14, 2007 23:15:51 GMT
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Not sure tbh.
Copper gaskets don't compress at all (which is why they can be re-used) so I would have thought the surface would have to be totally flat to seal fully
But 0.002 aint a lot so it might work.
Sorry that was no use at all ;D
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Feb 14, 2007 23:18:39 GMT
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Feb 14, 2007 23:24:42 GMT
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B-8-D
Posted a lot
down to one car!!
Posts: 4,038
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Feb 14, 2007 23:43:29 GMT
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i should work ok IMO. but there maybe some more waterway corriosion with the ally/copper mix... but then that doesnt stop a lot of older engines using copper/brass radiators on ally engines  .. maybe a soft aluminium one would be ok too?? just a thought.. si |
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Don't you usually have to get into the business of wiring with copper head gaskets? Never used one but I'm sure I remember from dim memory that a chap I knew did and had to have his deck cut for the rings.
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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bstardchild
Club Retro Rides Member
Posts: 14,963
Club RR Member Number: 71
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Copper headgaskets Qbstardchild
@bstardchild
Club Retro Rides Member 71
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a guy on a reliant forum I'm on is looking to run some copper head gaskets off (he has access to a cnc lazer cutter) but someone has raised the question of: I think Laser cutters have big problems with copper - normally you need to cut it with a water jet cutter Reliant engines have aluminium blocks and heads, with a wet steel liner. this liner sits between 0.002 and 0.006 thou high of the deck of the block. Your opinions please...Will it seal OK? Probably I used one in a dolly sprint years ago and it was best thing I ever did to the car - kept blowing the std gaskets very quickly my opinion is that it will seal, OK, and the gaskets will be ok to remove and reuse on the same engine so long as the liners don't move? or is 0.002-0.006 to little to worry about? To get one to seal fully (bearing in mind block and head imperfections it's recomended that it's anealed and then sprayed with silver paint (couple of coats) and then installedwith the second coat still tacky...... This was what I had to do in1983 so things may have changed since then (probably not tho!!) |
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Mr K
Posted a lot
Posts: 2,993
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Feb 15, 2007 10:41:10 GMT
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Cheers BC, now people on the reliant forum are douting it will seal around the oil way...
I'm not sure what cutter this guy has, i only asumed it was a lazer cutter.
so the fact the liners stand proud wont cause any problems?
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bstardchild
Club Retro Rides Member
Posts: 14,963
Club RR Member Number: 71
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Copper headgaskets Qbstardchild
@bstardchild
Club Retro Rides Member 71
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Feb 15, 2007 11:10:55 GMT
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Cheers BC, now people on the reliant forum are douting it will seal around the oil way... Bit of rubberised sealant round the oil way on both sides of the gasket should solve that I'm not sure what cutter this guy has, I only asumed it was a lazer cutter. It's something to do with the refractive properties of copper - bounces back and destroys the laser I seem to remember so the fact the liners stand proud wont cause any problems? I would have thought that a properly anealed copper gasket would contour round that sort of "edge" I'm not an expert on copper head gaskets and I am trying to remember stuff I found out 23 years ago so it's a mix of memory and best guesses Dolly Sprint engines - do they have liners? My problem and what led me to go to a copper gasket was I had the head skimmed 3 times and the block once to try to resolve head gasket sealing issues without sucess and in the end went copper to try and reduce the compression ratio back to a level that didn't need 5* fuel which was getting hard to get!! |
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I reckon it'd be OK but I certainly wouldn't want to re-use a head gasket. 
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