Engine design – water cooling arrangements

[Alex DU PRE 1Participant @alexdupre1]

Hi all,

I am designing a model four-stroke engine in single and four-cylinder versions. I am thinking about water cooling arrangements. Is it ok to have cooling water in direct contact with the iron piston liners; should I worry about corrosion and how would I seal the water-jacket/piston liner join?

The design has an allow cylinder block with cast iron liners.

Many thanks!

Alex.

[Alex DU PRE 1Participant @alexdupre1]

[JasonBModerator @jasonb]

Plenty of small IC engines run the water against the CI liner so should not be a problem.

Corrosion should not be a problem unless passages are very small, and add a bit of antifreeze to teh water which has inhibitors to counter rust.

Either press fit the liner to the cylinder, high temperature loctite of have O ring seals at the top and bottom of the liner.

J

[Mark P.Participant @markp]

Alex most of the English Electric 6/8/12/16 cylinder engines ran wet liners with no problems. They were sealed with 2 O rings at the bottom of the liner and a copper ring at the top.

Regards Mark P.

[Sub MandrelParticipant @submandrel]

The danger is electrolytic corrosion, but plenty of cars have that arrangement, which is why you need to put 'anti freeze and summer coolant' in, as it contains corrosion inhibitors. I suggest you do the same unless you drain the sytem after every running session.

Neil

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