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RE: Europa-List: Coolant overheating

Subject: RE: Europa-List: Coolant overheating
From: Karl Heindl <kheindl@msn.com>
Date: Sun, 27 Jul 2008 00:46:08

Hi Craig=2C

I am quite sure about the temperature. When it reaches about 120=2C it boil
s over into the overflow bottle=2C 
which is what I would expect. And in the cruise it is normal.
The ignition timing is something new and I wouldn't know how to check that.
 The engine is running just fine.
I will fly over to the Rotax agent this coming week and see if he has any i
deas.
Cheers=2C

Karl

<html><div></div>


From: craigb@onthenet.com.auTo: europa-list@matronics.comSubject: RE: Europ
a-List: Coolant overheatingDate: Sun=2C 27 Jul 2008 08:47:25 +1000


Karl=2C just a thought here=2C but do you KNOW your temp sender is correct
=2C IE stuck it in a pot of just boiled water which you can know the
temp of between one or two degrees of error and subjected it to vibration e
tc by shaking it etc. When I was racing we had problems from time to time w
ith faulty sender units that would
vary by as much as 20 deg C. and this variation would change across minutes
 or even instantly in some cases. It was a major pain to
work with=2C when you expect an engine to be running close to max temps=2C 
and then it spikes 20 degrees over max. Might i suggest
you try a fluid filled type sealed unit to run as a comparison so you can s
ee if there is a difference. 

The other thing i would be looking at if you believe the temps are accurate
=2C is your spark timing=2C excessively advanced timing will cause high tem
ps at low RPM. ie warm up
and taxi. but will not be as noticable at higher RPM. I have seen 20 - 30 d
egree C increase in temps from around 5 degrees of advance from say 10 to 1
5 degrees BTDC. high
levels of spark timing advance are generally helpfull at higher RPM but not
 much benefit at low RPM.  Some of the modern bike engines vary spark timin
g by as much
as 20 degrees depending on conditions. 

hope this helps

craig

-----Original Message-----From: owner-europa-list-server@matronics.com [mai
lto:owner-europa-list-server@matronics.com]On Behalf Of Karl HeindlSent: Su
nday=2C 27 July 2008 7:55 AMTo: europa-list@matronics.comSubject: RE: Europ
a-List: Coolant overheatingBob=2C I certainly have=2C plus all the other ga
ps near the air intake. I sealed off the gills and opened up the area at th
ebottom aft of the radiators for main exit. Karl<html><div></div>

From: ptag.dev@tiscali.co.ukTo: europa-list@matronics.comSubject: RE: Europ
a-List: Coolant overheatingDate: Sat=2C 26 Jul 2008 22:13:02 +0100


Hi! Karl
Have you blocked the gap between cowl and underside of oil cooler?
Bob H 

-----Original Message-----From: owner-europa-list-server@matronics.com [mai
lto:owner-europa-list-server@matronics.com] On Behalf Of Karl HeindlSent: 2
6 July 2008 13:30To: europa-list@matronics.comSubject: Europa-List: Coolant
 overheating

I have been unable to solve my overheating problem:I had replaced all glyco
l coolant and all hoses. Ever since then the coolant temperatures on the gr
ound and in the climb are way ahead of the oil temperature.After warming up
 the engine the coolant is typically 25 C (45 F) hotter than the oil. The o
il and cylinder head temperatures are always normal. Only in the cruise am 
I getting normal readings. The coolant temp. probe is in the coolant and is
 accurate.I have run out of ideas. Has anyone got any clue about this myste
ry ? Cheers=2C Karl <html><div></div>

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