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Old 17-04-18, 11:46 AM   #11
martinpaff
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I am reasonably sure there is a Morris 8 owner on the forum. He's been (unusually) quiet so far...

MP
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Old 17-04-18, 02:16 PM   #12
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Sorry, just woken up ! Seen this and the basic information for the Morris 8 UB engine is
Contact points set to 0.012 inches

Set ignition to TDC at fully retarded. Adjust as necessary once running.

Valve clearances 0.019 inches cold or 0.020 hot

Valve timing is approximately ( depending on cam wear)
Inlet opens 8 degrees BTDC
Inlet closes 52 degrees ABDC
Exhaust opens 52 degrees BBDC
Exhaust closes 20 degrees ATDC

Firing order 1 3 4 2

Compression ratio about 5.8 to 1

Main and big end bearings are officially cast and machined heavy white metal shells but series E or MM Minor con rods are often fitted which have ordinary replaceable thin wall shells.

BHP on a really good day up to about 23 at 3900 rpm

The engines were usually ground to standard re grind sizes (-.010" etc) and there were suitable con rods and main shell bearings supplied by Morris but alas no more so take care when examining the bearings and dont get them mixed up as the Morris factory were particularly good at only doing what needed to be done. i.e. all the mains could be different sizes depending on wear ditto the big ends. You could get a real mixture of con rod types as well !

Oh. I should add that I have never seen any official numbers for bearing wear tolerance but its usually the rear main that wears badly first. Check by trying to lift the crank when installed in the engine at the flywheel end.
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Old 17-04-18, 06:15 PM   #13
wolseley phill
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Brilliant, thank you! Once again, this forum proves to be a wealth of knowledge.

Phill.
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Old 17-04-18, 08:15 PM   #14
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Brilliant, thank you!

Itís for a tractor, it has a Solex carburettor, belt drive governor and Lucas dynamo.

Phill.
What tractor is it Phill ? BMB?
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Old 18-04-18, 09:53 PM   #15
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Yes indeed, a BMB President.

Phill.
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Old 19-04-18, 08:58 AM   #16
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Yes indeed, a BMB President.

Phill.
Nice little tractors. Full restoration or just rebuild for working?
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Old 19-04-18, 02:04 PM   #17
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Forgot to mention. All the threads on the morris UB engine are metric but with imperial size heads (Luvverly ! ) Take a good look at the cylinder head studs and if they are corroded consider replacing them. The thread is a 10mm coarse one. I understand that some studs from the VW beetle are suitable with a bit of engineering but you can get spare parts such as these from Ian Harris Morris Spares.

Cylinder head torque setting with new or good studs is recommended to be 45 Ft lb maximum cold. do it in 5 ft lb steps from about 20 to get it even and then re torque when hot. The sequence should be cast on the head top.

Head gaskets come in various qualities. Avoid some that are about that dont have the top & bottom copper layers rolled ove on the water holes. They tend to fail. Try and get payen copper asbestos (SHHH !) ones as they seem to last. If you need to know any thing else let me know.
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Old 19-04-18, 02:15 PM   #18
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(snip) All the threads on the morris UB engine are metric but with imperial size heads.
How did that come about - surely not still the Hotchkiss influence after all those years?

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Old 19-04-18, 05:59 PM   #19
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How did that come about - surely not still the Hotchkiss influence after all those years?

NHH
Check the head nuts on your Kubota to see this in reverse, studs are Ĺ" BSW

Neil
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Old 19-04-18, 07:50 PM   #20
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Quote:
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How did that come about - surely not still the Hotchkiss influence after all those years?

NHH
Yes Nick, it continued into the fifties until the merger and Austin engines then replaced the Morris produced ones in most of the ranges.

Pete.
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