Good work Rod! My 1940 Chev engine developed almost the same cracks but in two places back in 1995 on the 1st day of "Back to the Track" in Alice Springs, when the temperature dropped to Minus 8 over night and being in the centre of Australia, I did not have any anti-freeze in the cooling system.
The short term answer was a product called 'Irontite' (sic) which sealed the crack with a form of rust.
That engine is still ok and hasn't leaked yet.
Regards Rick.
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1916 Albion A10
1942 White Scoutcar
1940 Chev Staff Car
1940 F30S Cab11
1940 Chev WA LRDG "Te Hai"
1941 F60L Cab12
1943 Ford Lynx
1942 Bren Gun Carrier VR no.2250
Humber FV1601A
Saracen Mk1(?)
25pdr. 1940 Weir No.266
25pdr. Australian Short No.185 (?)
KVE Member.
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