#61
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Nice pistons Mike, where did you get them from as I will be requiring some spares for my engine. Its going to need to be relined, new pistons but the bottom end, cam shaft etc are in incredibly good condition with very little wear, so in that respect I am lucky.
Jon
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1950 Land Rover series 1 1967 Land Rover series 2A LWB 1986 Land Rover series 3 SWB 1938 DKW SB200 1944 DKW NZ350-1 1967 Ural K750 sidecar outfit 1944 VW Kubelwagen KDF82 1942 Steyr 1500A 1944 Morris C8A 1943 Chevrolet CMP8A HUP? 194? Bedford QL |
#62
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Quote:
I think you need the 4 cyl. EH pistons, these are a larger bore than my 6 cyl OH engine. Apparently the 4 cyl. pistons are more easily found , you should have little problem sourcing the 4 cyl. pistons
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1940 cab 11 C8 1940 Morris-Commercial PU 1941 Morris-Commercial CS8 1940 Chev. 15cwt GS Van ( Aust.) 1942-45 Jeep salad |
#63
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Mike,
If the rust on the 'new' rings will clean off with minimal pitting I would use them. individual pitts will make no difference but obviously any significant loss of metal is a no-no. A very fiddly job though as each will have to be done by hand a cm at a time. David |
#64
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rings
Quote:
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1940 cab 11 C8 1940 Morris-Commercial PU 1941 Morris-Commercial CS8 1940 Chev. 15cwt GS Van ( Aust.) 1942-45 Jeep salad |
#65
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Broken bolts
Getting back to the Morris engine .
One major problem is: the small M6 metric water jacket cover bolts have snapped off. My repair plan is to make a drilling guide plate and drill out the broken bolts. I can tap the holes to the larger M8 . size. A Hudson car restorer had the same problem, he used a drill press but he suggested using a mag drill would be ok. The drilling needs to be highly accurate. I have 4 holes where the bolts came to use as a guide. The holes are 46mm centre to centre in the x axis. . Pics will explain.
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1940 cab 11 C8 1940 Morris-Commercial PU 1941 Morris-Commercial CS8 1940 Chev. 15cwt GS Van ( Aust.) 1942-45 Jeep salad Last edited by Mike Kelly; 15-04-24 at 03:16. |
#66
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Big end bearings
The 1937 to 41 military CS8 truck engine had it's genesis in the family of pre-war Morris 25 engines, the Morris 'big six' sedan of 1937 to 39 utilized the 25hp 82mm bore engine, the basic block was used in both civilian and military vehicles with variations in the cylinder heads, pistons, manifolds , carby and water pump. They are similar to other pre-war engines: poured big end bearings as used in the CMP Chevrolet 216.
I found a 25 engine out of a civilian Morris truck, the crankshaft and bearings are good enough for my needs . I plan to make up a engine from the two engines I have stripped down. I have new valves , pistons and valve guides (made by me). Just need to find a good engine machinist .. These engines have a few peculiarities i.e. there isn't a rear main crank seal in the normal sense, they used a large flange with a threaded o.d. that throws the oil back . The dynamotor is chain driven by the duplex timing chain. The crankshaft has no counterweights.The military carburetor is a special updraft Solex-dustproof. Fuel is gravity fed to the carb from the Autovac vacuum unit that is mounted on the dash panel. Another oddity is: the Leyrub joints, these are rubber 'universal joints' on each end of the prop shaft.. These joints are still available new. .
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1940 cab 11 C8 1940 Morris-Commercial PU 1941 Morris-Commercial CS8 1940 Chev. 15cwt GS Van ( Aust.) 1942-45 Jeep salad Last edited by Mike Kelly; 16-04-24 at 12:06. |
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