Mon Oct 27 17:46:59 1997
- Message No. 1597
From: "AVL, Gregor Baer"
Subject: heat problems
Hi evereybody,
is seems that there are two different problems with engine heat.
1. ääooeaiua..... On my PC the direction looks like that)
I think that your "Thermostat" of the cooling circuit is broken. This is a
type of valve which controles the temperature of the engine opening or
closing the connection to the cooler depending on the temperature. That
means that not all the time the cooling water passes through the cooler but
only when the water is really hot. When you go on country roads you
normally dont need much cooling, so the temperature of the water goes down
and the valve closes. I think that your valve is always open.
To check this you have to take out the valve. It is located between the two
coolers above the engine. You have to take of the tank and then you will
see a round part withe four tube connections. One to each cyl. and one to
each cooler. You opent the part and inside you find tis valve. if it is
open and the water cold you can buy a new one and throw the old one away.
If not you put it into water and heat thje water up. The valve should open
betw. 80 and 84 degrees and it should open 8 mm if you heat it up to 95
degrees for more than 5 minutes. I am shure that this is your problem. Try
it. If it is OK call again :-)
Second problem: (denked)
The engine gets really hot in town. If it gets hot only in town you migth
have a problem with the fan or the thermoswitch. If it gets hot all the
time (even on the motorway going about 100 Km/h it is probably your
thermostat valve as well. Check it (When the engine is very hot and you
touch the cooler and it is only a little warm or almost cold it is the
termostat valve for shure.)
If it is the fan you can test it quite easy: Below te fan in the cooler
there is the thermoswitch. It is a round part with two cables. Take the
cables of and connect them (with ignition on!). Now the fan must work.
If it doesnt work check the fuse. Hafe a look as well if the fan moves
freely. Sometimes the fan is mechanically blocked (for example after the
bike fall on the ground). Then the fuse normally burns and there is no fan.
If the fan works when you connect the two cables and the thermostat valve
(see first part of mail) is OK the Thermoswitch is broken. --> buy a new one
Greetings Gregor
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