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whiteshadow
Joined: 24 Jan 2011 Posts: 78
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Posted: Thu Aug 28, 2014 4:59 pm Post subject: To Strip or Not to Strip?! |
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I've put back together my Singer 9 Engine (1933). But when clearing the garage it found 1 or possibly 2 aluminum end caps from the piston gudgeon pins.
These I remember were really loose and must have escaped in my fight to get the pistons in the block without snapping the rings. I'm not sure that all the pistons had them, but there were certainly a couple which were very loose. The pistons were fixed on the gudgeons..can't remember how and can't find the pictures.....so are the caps a fail safe?
.....What would you do??...strip down the whole engine again, with the risk of damaging hard to get parts or leave well alone? |
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peter scott
Joined: 18 Dec 2007 Posts: 7118 Location: Edinburgh
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Posted: Thu Aug 28, 2014 6:15 pm Post subject: |
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If the gudgeon pins are not secured by circlips or a clamp bolt at the small end then I think you definitely need to protect the cylinder walls.
If getting the rings into the bores was difficult you may be able to lower the pistons to the point where the gudgeon pins are out the bottom without pulling the top rings out.
Clearly any skirt ring will still need to be refitted and it will be much easier if you remove the crankshaft.
If you don't have a complete set of caps then I would get some made.
Peter _________________ http://www.nostalgiatech.co.uk
1939 SS Jaguar 2 1/2 litre saloon |
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V8 Nutter
Joined: 27 Aug 2012 Posts: 587
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Posted: Thu Aug 28, 2014 8:31 pm Post subject: |
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If you don't fit the caps you will have serious problems. I remember reboring a six cylinder Continental engine, our customer rebuilt the engine himself. Continentals had nylon caps on the gudgeon pins. He thought they were just packing and threw them away. We had to fit six liners to cover the damage in the bores, he also had to buy six new pistons, because the pins were ruined. |
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whiteshadow
Joined: 24 Jan 2011 Posts: 78
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Posted: Fri Aug 29, 2014 8:10 am Post subject: caps |
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Thanks guys that's really helpful.
I hadn't thought of just pulling the pistons out enough from the bottom to check the caps!....That will be ideal, I just don't want to disturb the new head gasket I took an age to fit!
....Know where I can get caps from ...or should I turn some up myself from Ali?
Mark |
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peter scott
Joined: 18 Dec 2007 Posts: 7118 Location: Edinburgh
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whiteshadow
Joined: 24 Jan 2011 Posts: 78
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Posted: Sun Aug 31, 2014 8:44 am Post subject: update |
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I could indeed get to the gudgeon pin caps from the sump.
On inspection I had three missing caps........routing around in boxes and tins I found 2 of them. Ordered some Ali rod on eBay...I'll just turn up the final one.
Thanks for the help!
Mark |
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peter scott
Joined: 18 Dec 2007 Posts: 7118 Location: Edinburgh
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Posted: Sun Aug 31, 2014 9:37 am Post subject: |
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Hi Mark,
You won't regret the extra work.
Peter _________________ http://www.nostalgiatech.co.uk
1939 SS Jaguar 2 1/2 litre saloon |
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Old Wrench
Joined: 23 Dec 2013 Posts: 226 Location: Essex and France
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