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BUGIE
Regular Member
Malta
505 Posts |
 Posted - 26/12/2007 : 00:48:01
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Hey Guys,
How would I go about changing the coolant from my CB400sf as the stuff thats in there is looking rather horrible? Also do i need to use a specific type of coolant?
Cheers,
Chris |
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heppie
Settled In Member
United Kingdom
80 Posts |
Posted - 26/12/2007 : 21:22:00
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| tank off, coolant filler cap off, undo bolt on waterpump casing and let it drain into a container. put bolt back in(very important :P) then fill up with coolant, run bike for a couple mins, wait for it to cool, then top up as needed. think thats about it, im not sure if theres any bleed bolts anywhere along the system but im sure someone will point out if there is :D |
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Irishsuperfour
New Member
Ireland
25 Posts |
Posted - 02/01/2008 : 12:00:44
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| thewre is a bleed bolt in the centre of the water pump. run motor for a few minutes to build pressure. crack open the bolt to release the pressure. make sure coolant cap is on when you are doing this. also use pure coolant do no dilute it with water as some people will tell you to. if you do it will furr up the water passages in the motor |
what's the craic? |
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alexibrow
Settled In Member
United Kingdom
64 Posts |
Posted - 04/01/2008 : 15:05:00
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I remember back when I worked as a Peugeot mechanic that I unscrewed any bleed screws BEFORE adding the new coolant. As the system fills up, any air in the system can then escape through the bleed screw(s). Once a constant trickle of coolant begins flowing from the bleed screw, close each one off in turn and continue filling in this way until full.
Then, to ensure all the air is out of the system, run the engine WITH THE RADIATOR CAP OFF for a couple of minute, or until the coolant level begins to rise. Any air still trapped in there will be allowed to escape as the coolant circulates.
Radiator cap back on, job's a good 'un!  |
It's not karma, its bikema. |
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alexibrow
Settled In Member
United Kingdom
64 Posts |
Posted - 04/01/2008 : 15:08:21
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| PS I don't recommend that you crack open a bleed screw when the engine's hot - this sounds quite dangerous to me, as you don't know where the scalding coolant will end up! (In my experience, on your hands...) |
It's not karma, its bikema. |
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BUGIE
Regular Member
Malta
505 Posts |
Posted - 04/01/2008 : 16:23:09
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cheers guys..
To start at the beginning - How do I remove the tank?? |
Edited by - BUGIE on 04/01/2008 19:30:34 |
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alexibrow
Settled In Member
United Kingdom
64 Posts |
Posted - 04/01/2008 : 19:46:12
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Nice and simple, the first time I did it it took about 10 minutes:
1. Turn off the fuel tap and pull the pipe off the the tap outlet (the one that goes to that goes to the carbs).
2. Under the seat there are two bolts holding the tank in place - remove these.
3. Gently lift up the tank from the back edge, and pull the vent pipes off from underneatht the tank, leaving the pipes in place.
4. Disconnect the fuel sender wire from the sender, under the right hand side of the tank.
5. Then just pull the tank backwards so it pops off the front retaining lugs and Bob's your uncle!
Let us know how you get on. |
It's not karma, its bikema. |
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Irishsuperfour
New Member
Ireland
25 Posts |
Posted - 04/01/2008 : 20:44:23
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only one prob with filling up with bleed bolt out... its at the bottom of your motor so all your coolant ends up on the floor. fill up run for 2 minutes to build pressure then release air. no way hot enough to bur you.
Bugie remove seat. 2 bolts at rear of tank remove them. disconnect fuel line and vacumn line from fuel tap. lift rear of tank up and pull tank towards rear of the bike. job done. and as they say in all good manuals "reassembley is a reverse of the above" |
what's the craic? |
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BUGIE
Regular Member
Malta
505 Posts |
Posted - 04/01/2008 : 23:25:37
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| lol. Thanks alot Guys.... |
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Seeby400
Regular Member
United Kingdom
590 Posts |
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BUGIE
Regular Member
Malta
505 Posts |
Posted - 27/01/2008 : 20:41:50
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Right guys,
managed to get the tank off but encountered a problem.. Whilst removing the 2 pipes at the back of the tank the smaler pipe to the right of the tank as you sit on it came off with the tank.
It appears as though it was connected to another pipe by means of a connector..
After a few tantrums I managed to reconnect it however its not as secure as I would like so i'm pretty sure its going to give me hassles when reattaching the tank..
What does this pipe do and should it come unattached what sort of symptoms would it give?
While its off i'm going to change the spark plugs, does anyone know what size spanner i need? |
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alexibrow
Settled In Member
United Kingdom
64 Posts |
Posted - 27/01/2008 : 21:19:43
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I think the pipe to which you refer is just a breather, and exits the frame by the rear brake pedal. I could be wrong though... Does anyone else know?
Can't help you with the plug spanner, sorry; I use the Honda plug spanner to do mine. |
It's not karma, its bikema. |
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Topic |
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Changing coolant
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