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[Kevin Wood]

Hi,
Try vacuuming it out.  If you can get a short length of 8 or 10 mm tube, even bit of thin wall electrical cable sleeving biggest you can get to go down spark plug hole, fix into the end of vacuum cleaner hose, and get seal with electrical or duck tape. "Wiggle" this around inside the cylinder.

Now, that is a good plan.

Even if the tube isn't big enough to take the piece of rubber, you might well be able to use it as a "rubber magnet".
Kevin

[JamesV6CDX]

May have to get an extension lead to run across the road... I'm not sure a vaccum cleaner would run off my 300w inverter  

If all fails, and I take a chance - is there a risk of piston ring damage? If not, I am not worried about much else

[Dazzler]

May have to get an extension lead to run across the road... I'm not sure a vaccum cleaner would run off my 300w inverter  

If all fails, and I take a chance - is there a risk of piston ring damage? If not, I am not worried about much else

Extremly unlikely James

[markey mark]

May have to get an extension lead to run across the road... I'm not sure a vaccum cleaner would run off my 300w inverter  

If all fails, and I take a chance - is there a risk of piston ring damage? If not, I am not worried about much else

deffo not james

[Bandit127]

Think about the gap between the cylinder wall and the piston. A couple of thou? 0.002" = 0.05mm.

The possible force that 0.05mm of HT lead rubber can exert is?

Tiny, compared to a hardened steel ring sitting in an aluminium channel.

Even if you get a bit stuck down there - and even if it is silicone rubber (which I doubt - probably natural) it will be gone in 60 seconds.

[hotel21]

Vacuum wont work, imho, but an airline will....  If you overfill the chamber with air it will a) pressurise it and b) disturb the piece of pesky wubber such that it can be carried oot the wee hole left.  Would suggest that air be applied via a tube so as to ensure the air is entering inside the bore rather than simply blasting it willy nilly at the plug 'ole mouth...

Or leave it be.  Box it up and fire it up and let it burn....  

Or use air and vacuum at the same time, to ensure the wubber bit knows where it should go.....  

[Bandit127]

It goes without saying that a piston engine is an air compressor. About 10:1, or 7.5 bar, or 110 psi with spark plug fitted and throttle open.

Probably about the same with the spark plug out and the throttle closed.

[Kevin Wood]

Vacuum wont work, imho, but an airline will....  If you overfill the chamber with air it will a) pressurise it and b) disturb the piece of pesky wubber such that it can be carried oot the wee hole left.  Would suggest that air be applied via a tube so as to ensure the air is entering inside the bore rather than simply blasting it willy nilly at the plug 'ole mouth...

Or leave it be.  Box it up and fire it up and let it burn....  

.. and if you're going to blast it with air, it'll probably be more effective if you turn that cylinder to TDC on the compression stroke so the valves are closed and the volume of the cylinder is minimised.

Kevin

[hotel21]

Vacuum wont work, imho, but an airline will....  If you overfill the chamber with air it will a) pressurise it and b) disturb the piece of pesky wubber such that it can be carried oot the wee hole left.  Would suggest that air be applied via a tube so as to ensure the air is entering inside the bore rather than simply blasting it willy nilly at the plug 'ole mouth...

Or leave it be.  Box it up and fire it up and let it burn....  

.. and if you're going to blast it with air, it'll probably be more effective if you turn that cylinder to TDC on the compression stroke so the valves are closed and the volume of the cylinder is minimised.

Kevin

correct.

Took assumption that this would be done....  

[Gaffers]

Have you not got any of those thin grabbers that kids use to steal stuff out of vending machines?  (not that I ever did of course.....  )

[philhoward]

So.....did it come out of the plug hole???

We need to know...

[JamesV6CDX]

Nope. still undecided what to do. Attempts to remove have failed.

[FRE07962128]

Nope. still undecided what to do. Attempts to remove have failed.

As I was away yesterday, only just followed this thread.

Personally, after taking all the great advice on board and you obviously still not being able to get the piece of rubber out, I would run the engine and go for the burn out solution!  

Yes there is a risk (I think very small), and I am one for taking such risks, but on balance as has been said what is there to lose?  If it burns, you don't have to take the head off; if there is damage, which I doubt, then you will have to take the head off as you will have to if you do nothing else!

Sometimes James you have to go for these things, be bold and adventerous when all else fails!  Go for it!  LET IT BURN!! 8-) 8-) 8-) Burn, baby, burn!!

[sassanach]

get a piece of 3mm welding wire, and grind it to a point, and try and spear it. or dab a bit of tigerseal/sikaflex on the end of a bit of welding wire and stick to it instead.i personally would not run a engine which has a compression ratio of 10.5 to one with a foreign object in it.your call!!

[FRE07962128]

get a piece of 3mm welding wire, and grind it to a point, and try and spear it. or dab a bit of tigerseal/sikaflex on the end of a bit of welding wire and stick to it instead.i personally would not run a engine which has a compression ratio of 10.5 to one with a foreign object in it.your call!!

But this is not a piece of metal, but a small item made of rubber which will very quickly disintegrate under the intense heat and compression