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g-iani(at)ntlworld.com
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 Posted: Sun Jun 08, 2008 11:37 am Post subject: Europa-List914 Overheating/boiling |
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G-IRON, has a 914 that has suddenly developed a tendency to boil.
Nothing has been done to the aircraft to precipitate this.
Even with short warm up and taxi it will boil slightly as you clime out
(at about 500ft). It will then stop boiling during the flight. On
landing it will boil again as you come to rest. The boiling is quite
gentle, not a big explosion of steam. It is filled with water/glycol.
We have been over everything looking for hot spots such as a coolant
pipe in contact with the exhaust and all is as it should be. The Rads
have been checked and they are both OK.
Has anyone got any ideas that might help
Ian Rickard G-IANI XS Trigear, 200 hours
Europa Club Mods Rep (Trigear)
e-mail mods(at)europaclub.org.uk
or direct g-iani(at)ntlworld.com
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Gilles.Thesee(at)ac-greno
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| Posted: Sun Jun 08, 2008 11:53 am Post subject: Europa-List914 Overheating/boiling |
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G-IANI a écrit :
| Quote: |
G-IRON, has a 914 that has suddenly developed a tendency to boil.
Nothing has been done to the aircraft to precipitate this.
Even with short warm up and taxi it will boil slightly as you clime out
(at about 500ft). It will then stop boiling during the flight. On
landing it will boil again as you come to rest. The boiling is quite
gentle, not a big explosion of steam. It is filled with water/glycol.
|
Ian,
Would you care to expand on this boiling issue ?
How does this boiling manifest itself ? High temp readings, steam trails ?
Best regards,
--
Gilles
http://contrails.free.fr
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rparigor(at)suffolk.lib.n
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| Posted: Sun Jun 08, 2008 1:05 pm Post subject: Europa-List914 Overheating/boiling |
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Hi G-IANI
"Even with short warm up and taxi it will boil slightly as you clime out"
"Has anyone got any ideas that might help"
Will the system hold 1.2 bar pressure? If pressure drops boiling temp will
go down. I had a pressure cap on my 1992 Volvo turbo Station Wagon get a
very small hairline crack perhaps a year ago and what you describe is bout
what happened to me.
Pretty easy to check are radiator fins restricting? Has any hose or
fitting changed to cause a restriction?
Harder to check, is radiator internal restricting? Is water pump working
properly?
Good Luck
Ron Parigoris
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trevpond(at)aol.com
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| Posted: Mon Jun 09, 2008 1:02 am Post subject: Europa-List914 Overheating/boiling |
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Hi Ian,
Have you changed your coolant reservoir cap since taking out the evans?
regards
Trev
G-LINN
--
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topglock(at)cox.net
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| Posted: Mon Jun 16, 2008 2:42 pm Post subject: Europa-List914 Overheating/boiling |
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Sorry for the late reply, but here is a possible problem. I have seen,
on occasion, the impeller in a water pump loosen itself from the shaft
and virtually stop pumping fluid. I know it's very rare, but still a
possibility to explore, should you not be able to resolve the issue by
other means...
Jeff - Baby Blue
rparigor(at)suffolk.lib.ny.us wrote:
| Quote: |
Hi G-IANI
"Even with short warm up and taxi it will boil slightly as you clime out"
"Has anyone got any ideas that might help"
Will the system hold 1.2 bar pressure? If pressure drops boiling temp will
go down. I had a pressure cap on my 1992 Volvo turbo Station Wagon get a
very small hairline crack perhaps a year ago and what you describe is bout
what happened to me.
Pretty easy to check are radiator fins restricting? Has any hose or
fitting changed to cause a restriction?
Harder to check, is radiator internal restricting? Is water pump working
properly?
Good Luck
Ron Parigoris
------------------------------------------------------------------------
Checked by AVG.
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