Hymn to the 1928 Model C
- Vincent.vanGinneke
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Re: Hymn to the 1928 Model C
Thanks Charles !
Bob, I welded cast iron bits from another barrel (I think from a Norton Dommi) with normal wire by MIG.
The first try out was on a 350 head (expendable..) with a broken out rocker box bolt hole.
That one I heated on a electric stove but I noticed that it did not get hot enough.(about 200 C )
I tried to keep as much heat in the part by covering it with ceramic blanket.
But It was tricky and it needed a different approach.
Now I use a pottery kiln and welded bits on the cilinderhead and barrel for Burney and also a 1940 cast iron VH head, all went o.k.
So thats what I use now, a top loader pottery kiln (it can reach 1200+ C ) to about 280 / 300 degree C .
I dont weld inside the kiln, it's simply to hot with the heat radiating from the open lid.
I take the part out and to prevent a thermo shock I put it on the -red hot- electric stove
pics show that 350 head
Note that these fin bits are just ornamental.
The stress I put in with the heat is 'only' on the outside.
Possibly I just got lucky with that bolt hole ?
I dont think it is doable to weld a cilinderhead with a cracked combustion chamber by MIG welding.
But you never know... perhaps worth a try ?
Looking for a cracked BSA head now
Bob, I welded cast iron bits from another barrel (I think from a Norton Dommi) with normal wire by MIG.
The first try out was on a 350 head (expendable..) with a broken out rocker box bolt hole.
That one I heated on a electric stove but I noticed that it did not get hot enough.(about 200 C )
I tried to keep as much heat in the part by covering it with ceramic blanket.
But It was tricky and it needed a different approach.
Now I use a pottery kiln and welded bits on the cilinderhead and barrel for Burney and also a 1940 cast iron VH head, all went o.k.
So thats what I use now, a top loader pottery kiln (it can reach 1200+ C ) to about 280 / 300 degree C .
I dont weld inside the kiln, it's simply to hot with the heat radiating from the open lid.
I take the part out and to prevent a thermo shock I put it on the -red hot- electric stove
pics show that 350 head
Note that these fin bits are just ornamental.
The stress I put in with the heat is 'only' on the outside.
Possibly I just got lucky with that bolt hole ?
I dont think it is doable to weld a cilinderhead with a cracked combustion chamber by MIG welding.
But you never know... perhaps worth a try ?
Looking for a cracked BSA head now
- Bob.Murphy
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Re: Hymn to the 1928 Model C
Thanks Vincent, that's very interesting.
I sent a 600 Panther barrel off for sleeving and a fin got broken in transit. The company doing the work (T&L Engineering (Bedford) Ltd.) brazed it back together. Its a good repair.
One day I'll get it running .
Bob.
I sent a 600 Panther barrel off for sleeving and a fin got broken in transit. The company doing the work (T&L Engineering (Bedford) Ltd.) brazed it back together. Its a good repair.
One day I'll get it running .
Bob.
My avatar shows the late Len Rich in 1970 with the bike I now have - a 1958 Ariel VH
- Vincent.vanGinneke
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Re: Hymn to the 1928 Model C
Not much done (again)
But I fitted new guides, valves and a sparkplug size reducer supplied by Karol
butchered a ring spanner to make it in a thin walled tube spanner to fit that reducer.
New Westwood cylinder liner (number WCL22B at 32,15 GBP ex vat) is on it's way from the UK , thank you Steve !
Crankcase mouth has been skimmed and flywheel build up with nos bigend + new main bush.
https://westwoodcylinderliners.co.uk/pr ... e-by-size/
But I fitted new guides, valves and a sparkplug size reducer supplied by Karol
butchered a ring spanner to make it in a thin walled tube spanner to fit that reducer.
New Westwood cylinder liner (number WCL22B at 32,15 GBP ex vat) is on it's way from the UK , thank you Steve !
Crankcase mouth has been skimmed and flywheel build up with nos bigend + new main bush.
https://westwoodcylinderliners.co.uk/pr ... e-by-size/
- Vincent.vanGinneke
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Re: Hymn to the 1928 Model C
Hi Dave, Thanks.
Are you coming to the BOM ?
Are you coming to the BOM ?
- Vincent.vanGinneke
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Re: Hymn to the 1928 Model C
Bottom end ready.
Nice detail is the cylinder boring machine on the left.
This was bought from the estate of Augustinus in Den Hague in the seventies .
Now it will reline my Model C cylinder once delivered by that same Augustinus company.
How about that for tradition !
Nice detail is the cylinder boring machine on the left.
This was bought from the estate of Augustinus in Den Hague in the seventies .
Now it will reline my Model C cylinder once delivered by that same Augustinus company.
How about that for tradition !
- Vincent.vanGinneke
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Re: Hymn to the 1928 Model C
started with the first layers of black.....what fun
Made a second spray boot, this time inside the workshop as the shed is still to cold.
Bonus is the chimney that belonged to the kiln I used to have.
that 2K stuff does funny things with you
Made a second spray boot, this time inside the workshop as the shed is still to cold.
Bonus is the chimney that belonged to the kiln I used to have.
that 2K stuff does funny things with you
Re: Hymn to the 1928 Model C
All that beautiful work has a cost!
1937 Guzzi GTV, 1939 VH bitsa, 1947 VH, 1981 Guzzi Monza, 1983 Guzzi Lemans
- Karol Burger
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Re: Hymn to the 1928 Model C
our women say that small children have small toys and those big children have big toys. I'm glad I'm part of this community of big kids.
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