bmcecosse wrote:No idea about your 'seal' - post up a picture! For duplex - you need better than 'brake drum screws' - you can't get them tight enough. Proper countersunk Allen head screws - 1/4" UNF are required. However - a duplex chain on a standard 948 is WAY overkill! And NO - don't drill holes in anything fit a temp gauge! Get a thermostat cover with tapped temp sensor hole already in it...... New oil pump is a very good idea- but are you renewing the crank and it's bearing shells ? the Bull Motif exchange crank is an absolute bargain..........
i'm certainly no expert, but a duplex is a 'fit and forget'. it doesn't need any bubber bands and is much more quieter. i think its good practice.
the bearing shells? is that worth the effort? i will be flipping it over and removing the sump at some point to fit new gaskets.... so i suppose you could be right. but if there's no play in the bores, i'm tempted to leave alone
Well - it's not just a case of 'unleaded valves' anyway! Don't bother - it's one of the biggest 'cons' out there - just grind the valves in, set the exhausts to 15 thou, and keep an eye on the gaps every 3000 miles or so.........
The timing cover that you have sounds like an original 948 with the felt seal. This never was very reliable, and it would be worthwhile finding a later cover with a conventional lip oil seal. The later seal will not fit into the felt seal cover.
The timing cover that you have sounds like an original 948 with the felt seal. This never was very reliable, and it would be worthwhile finding a later cover with a conventional lip oil seal. The later seal will not fit into the felt seal cover.
that sounds the right answer to me. if i were to look for a later cover, what engine would i get it from? a 1098 perhaps?
From a Minor a 1098, or any other 1098/1275 non-A+ engine. A MIni from around 1962/4 onwards I think, including the later 850 and then the 998? Or from an A+ engine that had a 'proper' tensioner, but needs a bit of drilling; there was a post about it recently.
linearaudio wrote:10 cm play in the chain! Thats nearly 4 inches!!! Anything would rattle less than that!
Why oh Why did you pay for flywheel bolts and carraige when a lump of 3x2 would have done admirably!
Is your curious seal one of the old felt-in-a-steel-shell jobs, maybe? The standard type should fit straight in.
ampwhu wrote:the new oil pump instruction say it needs to be 'primed' upon fitting. whats this mean?
The way I prime the pump is to assemble everything up to the stage where I'm about to put the head on, then pump most of an oil can into the oil gallery that passes through the head gasket, turning the engine backwards a little at the same time. Seems to work. Also, before I start the engine for the first time, I run it on the starter motor with the ignition off until the oil pressure warning light goes out.
Alex Holden - http://www.alexholden.net/
If it doesn't work, you're not hitting it with a big enough hammer.
I've always used vaseline without any problems before... and definately, as alex says, run the pressure up on the starter before firing the engine.....
[sig]8426[/sig]
Compare the Minors - Simples !! http://mog.myfreeforum.org/index.php
You only need to use vaseline etc if the pump is going to stand for ages before the engine will be run. Otherwise- just put some clean engine oil through it and slap it on. You MUST get pressure on the starter before starting the engine - 50 psi if you have a gauge - otherwise crank it till the oil light goes out and then keep cranking for another 5 to 10 seconds. The cork gaskets are for the earlier (948) cam follower covers - the rubber ones are for the later (1098) covers - and are MUCH better. I expect they have given you many spare carb/manifold gaskets - don't worry - you will soon have a big pile of them!
with the new duplex chain, i managed to get hold of a later-type timing cover with the rubber seal. now if i fit the old oil thrower, the cover won't fit on. if i try and fit the new thrower that came with the duplex set, that doesn't fit the crankshaft???? obviously the oil thrower only goes one way, otherwise it will hit the chain. the old cover (felt seal) fits fine. but i was advised to fit a later type (rubber) but i can't see how.
The old thrower won't do - you need the new 'flat disc' thrower. I suspect the thing you have been 'given' is in fact a tabbed washer for the camshaft retaining nut.......... I hope you have countersunk the two holes for the (countersunk head) retaining screws that go through the mounting plate - into the front main bearing?
bmcecosse wrote:The old thrower won't do - you need the new 'flat disc' thrower. I suspect the thing you have been 'given' is in fact a tabbed washer for the camshaft retaining nut.......... I hope you have countersunk the two holes for the (countersunk head) retaining screws that go through the mounting plate - into the front main bearing?
yes i have put the 2 countersunk screws in just behind the bottom (small) cog.
where would i get this 'flat disc thrower' from then? should it have come with the kit?
