littlecat Posted March 3, 2014 Posted March 3, 2014 ok, have the replacement rad for my cbr now...just looking for a basic walk through from those in the know, incase theres anything ive missed.think I know the theory, and ive bought a new crush washer for the drain bolt....plan on leaving the hoses attached to the engine, just undo them from the actual rad and swap them over.will I need anything else I havnt thought of , and apart from the obvious ( ie drain the system before I start ) , roughly whats the step by step ? Quote
Tango Posted March 3, 2014 Posted March 3, 2014 You'll need a swear box......if those hoses haven't been removed from the rad in 15 odd years there's a good chance they're not gonna come off without a fight..... Quote
Joeman Posted March 3, 2014 Posted March 3, 2014 Pop the bottom hose off (water everywhere) pop the top hose off, unbolt the rad from the bike, and fit new one.Hopefully the old hoses haven't gone too hard. warm the engine a bit to help make the pipes supple. Also not so cold on your hands when the water pours over them. Quote
Tango Posted March 3, 2014 Posted March 3, 2014 If the new rad doesn't have the fan fitted to it you'll need to swap that over...and also check for any sensors that may be fitted to the rad.When the new rad is fitted you need to fill it with coolant and crack the drain ports at the water pump and cylinder jacket to release any airlocks in the system. You can squeeze the hoses while filling too to "burp" the system....again, to release any airlocks..... Quote
Tango Posted March 3, 2014 Posted March 3, 2014 Can't believe no one has mentioned the fan Ahem......see the post above.... Quote
littlecat Posted March 3, 2014 Author Posted March 3, 2014 the new rad has a fan, just need to sort the wiring out.why would I get water everywhere if I drain the system first ?? Quote
Chrissb6 Posted March 3, 2014 Posted March 3, 2014 Hi Cat, take some pic's on your mobile phone or camera as you strip it out, you can then review if you should loose your way. Just to mention also disconnect the battery, l would remove the tank this will throw additional light onto the job and protect the your paintwork. make sure you have a good earth connection on the rad or you will have problems with the temperature sensor, On refilling the system make sure you open the vent screw on the water pump. Have fun! Quote
littlecat Posted March 4, 2014 Author Posted March 4, 2014 vent screw?? havnt seen mention of that ...only the drain bolt thingy ( got a new crush washer as it says to remove it completely and drain the system before swapping the rad) although not sure if that's necessary now listening to you lot Quote
Chrissb6 Posted March 4, 2014 Posted March 4, 2014 vent screw?? havnt seen mention of that ...only the drain bolt thingy ( got a new crush washer as it says to remove it completely and drain the system before swapping the rad) although not sure if that's necessary now listening to you lot Hi Cat there should be a 8mm drain - vent bolt on the water pump on the lower left of the engine. Open this to drain the system and when refilling open this bolt again to vent the air out of the water pump, if you don't vent the pump you will end up with an air lock in the pump resulting in no circulation and the motor over heating.I found a video clip here it's not your bike but l think the pump is almost identical "> Quote
Joeman Posted March 4, 2014 Posted March 4, 2014 So long as the water pump is below the level of the bottom hose you can swap out the rad without having to drain the whole system. Water remains in the pump so no need to prime the pump.Although if you Dont know how long the coolant has been in there its probably a good idea to drain it all out. Quote
littlecat Posted March 4, 2014 Author Posted March 4, 2014 vent screw?? havnt seen mention of that ...only the drain bolt thingy ( got a new crush washer as it says to remove it completely and drain the system before swapping the rad) although not sure if that's necessary now listening to you lot Hi Cat there should be a 8mm drain - vent bolt on the water pump on the lower left of the engine. Open this to drain the system and when refilling open this bolt again to vent the air out of the water pump, if you don't vent the pump you will end up with an air lock in the pump resulting in no circulation and the motor over heating.I found a video clip here it's not your bike but l think the pump is almost identical "> ah ok, so vent screw/drain bolt = same thing...phew, thought id completely missed something there lol Quote
littlecat Posted March 4, 2014 Author Posted March 4, 2014 So long as the water pump is below the level of the bottom hose you can swap out the rad without having to drain the whole system. Water remains in the pump so no need to prime the pump.Although if you Dont know how long the coolant has been in there its probably a good idea to drain it all out. would rather drain it and flush it, as some very helpful mates chucked a bottle of rad weld in, ( which did do the job)rather clean the lot and start again Quote
Stu Posted March 4, 2014 Posted March 4, 2014 Can't believe no one has mentioned the fan Ahem......see the post above.... bugger missed that Quote
Joeman Posted March 5, 2014 Posted March 5, 2014 So long as the water pump is below the level of the bottom hose you can swap out the rad without having to drain the whole system. Water remains in the pump so no need to prime the pump.Although if you Dont know how long the coolant has been in there its probably a good idea to drain it all out. would rather drain it and flush it, as some very helpful mates chucked a bottle of rad weld in, ( which did do the job)rather clean the lot and start again I'd be tempted to run a hosepipe into rad hose and run the engine to flush the system out.With the rad removed, run the hose pipe into one hose and allow the water out the other. Quote
OhJay Posted March 5, 2014 Posted March 5, 2014 I'd be tempted to run a hosepipe into rad hose and run the engine to flush the system out.With the rad removed, run the hose pipe into one hose and allow the water out the other. hahahahaha, I like your style.Can I be videoing it when we do this? Quote
littlecat Posted March 5, 2014 Author Posted March 5, 2014 I'd be tempted to run a hosepipe into rad hose and run the engine to flush the system out.With the rad removed, run the hose pipe into one hose and allow the water out the other. hahahahaha, I like your style.Can I be videoing it when we do this? ermmm....whadya mean we? , im guessing if your videoing , theres only one person getting wet here lol Quote
eastanglianbiker Posted March 5, 2014 Posted March 5, 2014 and the winner of the wet t'shirt comp is ...................................... Quote
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