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Coolant hose change - can it be easy?

RichUK

RichUK

2018-07-31 08:45:00 UTC

I've seen a write up (somewhere) where the guy did a full hose replacement and it required stripping the bike of the tank, filter and throttle bodies. Is that really required?

I'm getting some coolant loss from the thermostat downward hose. It has already got doubled up clamps on there (the OEM crimp type one and then a worn drive one below it ).
I'm thinking of getting full hose kit and new clamps to sort this once and for all.

Is it possible to do this whole job by just dropping the oil tank or moving the radiator outwards?
(I have a motohooligan airbox btw so that opens up the engine for side access.)

Is it possible to replace just the RHS ones (to the rad lower hose and all the small thermostat ones) by just dropping the oil tank or moving the radiator outwards?

If possible I'd like to do the minimum needed to stop the coolant loss now and finish off the job over winter when I'll probably be in there checking the valve clearances.

Edit: SD990 btw

No. 47

No. 47

2018-07-31 10:41:00 UTC

Top down strip (probably) required as it's a b*gger to get at the hoses between the cylinder heads - are you sure it's not leaking from the joint of the two halves of the thermostat?

RichUK

RichUK

2018-07-31 11:36:00 UTC

I can't really tell where it's coming from exactly as I can't really see it.

What's the easiest way to get a better view, undo the radiator and let is sag outwards?

No. 47

No. 47

2018-07-31 12:59:00 UTC

Only coolant leak I’ve had (apart from radiator.......) is from thermostat joint and that only after a lot of miles - might be work splitting thermostat and re-sealing to see if that’s problem before embarking on replacing hoses.

Adrock990r

Adrock990r

2018-07-31 13:38:00 UTC

Post missing.

RichUK

RichUK

2018-07-31 14:29:00 UTC

Just been out to have yet another poke around, took the RHS shroud off but that didn't really help with visibility of the area.

Coolant is collecting on the lower hose clamp and seems to be coming from the top hose clamp, as far as I can make out. I have tried to look all around the thermostat housing (using a small torch & a mirror) and I'm pretty sure it's dry all round. Also the hose that runs from the T-stat housing to the radiator looks a little damp as the T-stat end.

I think if I renewed just the 3 hoses that run to/from the T-stat it would sort it for now.
I'm guessing with the radiator removed I could get to these pretty easily... time will tell.

shadowman

shadowman

2018-07-31 15:46:00 UTC

I did the job.

Its not especially challenging but it is fiddly.

I took everything off (Tank, reservoirs, rad, TB's etc) but I was doing an overall refurb job so some of what I removed might not have been necessary) At minimum you would need to get down to the throttle bodies, cant see how it could be done without. Was bloody fiddly even with everything off.

Good luck.

Stratkat

Stratkat

2018-07-31 15:54:00 UTC

i replaced all the hoses. the only thing i removed were the plastic shrouds (had a Motobox). i have big hands too. this was like 5 years ago and i replaced them with a silicon set. the reason i mention this is there were screw clamps with the new set. the trick for me was to put everything together, then position the clamps to get them in a position to tighten everything down. if memory serves me right it only took about 5 hours.