Engine Coolant Change

by Ian Rees in 912 / 914 Technical Questions 7 years ago

Could anyone indicate where I can find the following information in the Rotax manuals for the change of engine coolant.

Periodic maintenance period (Change interval) for engines using Evans NPG waterless coolant

Thank you.

Re: Engine Coolant Change

by Roger Lee » 7 years ago

Roger Lee

125 5.12k 4.52k

Evans is not recommended anymore. It carries a 25-30F temp heat penalty and it;'s expensive. You can't top off the reservoir tank with anything, but Evans. I would change it by the 5 year rubber replacement time period.
If you have an open air engine or live in cold climates the extra temp may not be an issue. I don't believe there is anything in writing specifically on when to change Evans.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

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Re: Engine Coolant Change

by MARK JACKSON » 7 years ago

MARK JACKSON

12 332 11

Evans is good for the life of the engine, it doesn't need to be changed. If you needed to, you can add water or antifreeze to Evans, but you will loose all the benefits of the high boiling point and low freezing point and no corrosion. The only time you need to top up Evans is if you have a leak, as it won't boil over like a normal coolant containing water.

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Engine Coolant Change

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