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Old 20-03-09, 12:04 AM   #11
new holland
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Indusrial space heater. fill cyl with wd 40 heat it up till wd is bubling,
Guaranteed.
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Old 20-03-09, 02:33 PM   #12
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Would oil or grease do for loosening it?
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Old 20-03-09, 05:06 PM   #13
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As 12 20 Marshall said earlier in this thread you still need to "break" the rust ring where the rings are rusted to the bore. You only need a few thou of movement and then coke, deisel, vinegar etc will penetrate and ease the situation. For what its worth I found a good soaking in PLUS GAS will free most things off, though coke is cheaper per litre of course! Grease won't do anything and oil will be usefull AFTER the initial movement. A good piece of round hardwood to fit the edge of the piston, cut away to clear any domed piston crowns, and a nice big ommer will kill or cure it!

Pete.
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Old 25-03-09, 04:33 PM   #14
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Smile lol

Quote:
Originally Posted by Windrush View Post
As 12 20 Marshall said earlier in this thread you still need to "break" the rust ring where the rings are rusted to the bore. You only need a few thou of movement and then coke, deisel, vinegar etc will penetrate and ease the situation. For what its worth I found a good soaking in PLUS GAS will free most things off, though coke is cheaper per litre of course! Grease won't do anything and oil will be usefull AFTER the initial movement. A good piece of round hardwood to fit the edge of the piston, cut away to clear any domed piston crowns, and a nice big ommer will kill or cure it!

Pete.
lol i dunno mate if the goverment tax fizzy drinks like there planning on taxing choclate that litre of coke may rise above a litre of fuel it would be to valuable to use
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Old 27-03-09, 01:10 AM   #15
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Originally Posted by bolt thrower View Post
i saw a good one once on tv,s Salvage Squad,Boil oil then pour it into the bore!Apparantly thats an old R.A.F trick?
It works a treat! I have seen it used a few times.
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Old 27-03-09, 08:30 AM   #16
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Look at the constituents of Coke and Vinegar, you'll get an idea of why they tend to work.

Vinegar contains Acetic Acid, Coke contains Phosphoric Acid, both will attack rust, Phosphoric being the more aggresive of the two.

Peter
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Old 27-03-09, 09:12 AM   #17
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Quote:
Originally Posted by bolt thrower View Post
i saw a good one once on tv,s Salvage Squad,Boil oil then pour it into the bore!Apparantly thats an old R.A.F trick?
Its certainly NOT an old RAF trick . We don't allow pistons to sieze into bores (how very dare you!).

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Old 27-03-09, 03:07 PM   #18
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Red face Seized Pistons

I have to agree with Martin, the RAF do not allow pistons to seize. In my time, we had to turn over by hand 14 cylinder radial engines to prevent any chance of this and to prevent hydraulicing. In the depths of winter in the open air it wasn't much fun.
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Old 18-04-09, 10:50 AM   #19
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I saw that programe, wasn't that the one with the de Havilland Tiger moth?
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Old 28-04-09, 07:28 PM   #20
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I have also been told that hot oil is good at removing seized pistons
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