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ukdave2002
Joined: 23 Nov 2007 Posts: 4104 Location: South Cheshire
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Posted: Wed Oct 01, 2008 5:58 pm Post subject: What Are Your Engine Assembly Top Tips? |
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Dropped the Morris 8 engine off at the machine shop this morning, it will be done for Friday, so hopefully I'll be re asembling it this week end.
Do you have some useful tips when re-assembling an engine?
Cheers Dave |
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Roverron
Joined: 04 May 2008 Posts: 134 Location: Yorkshire
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Posted: Wed Oct 01, 2008 6:02 pm Post subject: |
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Absolute cleanliness and lots of oil on the bits before you fasten them together. Clean all the threads with taps/dies before starting will really help. _________________ To Hell with ambition, it drives a man mad, I can scarcely wake up to be fed. |
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Rick Site Admin
Joined: 27 Apr 2005 Posts: 22446 Location: UK
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ukdave2002
Joined: 23 Nov 2007 Posts: 4104 Location: South Cheshire
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Posted: Thu Oct 02, 2008 7:58 am Post subject: |
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Rick wrote: | What are you having done? bores, crank etc?
Rick |
Bores are at a maximim so having liners fitted which will take it back to standard 57mm bore, new valve guides, valve seats cut, crank reground, may have camshaft bearings fitted (non on a standrd engine) although on quick first inspection they didn't think this would be needed, block and head sufraced. |
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ukdave2002
Joined: 23 Nov 2007 Posts: 4104 Location: South Cheshire
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Posted: Thu Oct 02, 2008 11:18 am Post subject: |
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Any tips and words of wisdom do you have regarding fitting of the cork and rope crank oil seals? Do I soak the cork and fit wet or as someone suggested boil in gearbox oil first?
looking at them in the gasket set it is hard to belive the rope and cork are ever going to be reliable seals on a spinning crank !! |
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Rick Site Admin
Joined: 27 Apr 2005 Posts: 22446 Location: UK
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buzzy bee
Joined: 23 Nov 2007 Posts: 3382 Location: South Cheshire
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Posted: Thu Oct 02, 2008 12:38 pm Post subject: |
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A decent well callibrated torque wrench, If you need one over the weekend, I can bring one from work, recently tested?
Cheers
Dave |
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Rick Site Admin
Joined: 27 Apr 2005 Posts: 22446 Location: UK
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ukdave2002
Joined: 23 Nov 2007 Posts: 4104 Location: South Cheshire
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Posted: Thu Oct 02, 2008 2:20 pm Post subject: |
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buzzy bee wrote: | A decent well callibrated torque wrench, If you need one over the weekend, I can bring one from work, recently tested?
Cheers
Dave |
Dave that would be really useful if I can take up your offer.
I do have torque wrench but its 20 years old, never been calibrated , not used in anger for 10 years and I suspect will have been stored without zeroing on many occasions ! |
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buzzy bee
Joined: 23 Nov 2007 Posts: 3382 Location: South Cheshire
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Posted: Thu Oct 02, 2008 8:49 pm Post subject: |
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no problem, pm sent |
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pigtin
Joined: 23 Nov 2007 Posts: 1879 Location: Herne Bay
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Posted: Thu Oct 02, 2008 10:00 pm Post subject: |
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Can't remember if the pistons fit from the bottom on the Morris 8? if they do: make sure they remember to chamfer the bottoms of the liners. They didn't when they did my Austin 10/4 and I had to make a special tool to compress the rings when I had to refit a piston at a later date (with the engine in situ,) I had fiddled about for half a day before realizing this was the only course. _________________ Due to the onset of my mid eighties I'm no longer sprightly and rarely seen in my Austin special. I have written a book though. https://amzn.eu/d/7rwRRqL |
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peter scott
Joined: 18 Dec 2007 Posts: 7118 Location: Edinburgh
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Posted: Thu Oct 02, 2008 10:38 pm Post subject: |
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Ah! I know that problem. You can get one hand into the crankcase to push one side of the ring into the bore but what about the other two? sides?
Even if the liner is chamfered it's a fiddle. I seem to remember trying to get a ring compressor in but for some reason that I've know forgotten this was impossible and I ended up poking around with scriber points to get the rings in.
Oh, and you've got to remember where the ring location pegs are if your pistons are so designed.
Peter _________________ http://www.nostalgiatech.co.uk
1939 SS Jaguar 2 1/2 litre saloon |
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buzzy bee
Joined: 23 Nov 2007 Posts: 3382 Location: South Cheshire
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Posted: Thu Oct 02, 2008 10:45 pm Post subject: |
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Hi
Did you try wrapping a little shim steel around the pistons, and sliding them through that? (Just to get you in the bore)
Cheers
Dave |
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pigtin
Joined: 23 Nov 2007 Posts: 1879 Location: Herne Bay
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Posted: Fri Oct 03, 2008 10:15 am Post subject: |
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Hi Buzzy,
I did something similar to that. I used a piece of steel packing banding fitted into a slot in the end of a 5/16" rod. When the rod was rotated the banding compressed the rings.
Don. _________________ Due to the onset of my mid eighties I'm no longer sprightly and rarely seen in my Austin special. I have written a book though. https://amzn.eu/d/7rwRRqL |
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Jim Walker
Joined: 01 Oct 2008 Posts: 124 Location: Chesterfield, Derbys.
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Posted: Fri Oct 03, 2008 11:18 am Post subject: |
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From experience, my top tip would be to remember that oil (or grease) cannot lubricate where it cannot get. "Tight" fits are not good. The clearances recommended by the manufacturer allow for expansion AND lubrication. Don't rely on a tight bush or whatever to bed itself in - it will often be damaged before it does, possibly siezing. This does not apply just to engines, but to everything that rotates, slides, oscillates or any other type of bearing surface including king pins and bushes etc.
Jim. |
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