bust water temp sender
 

i've bust me water temp sender unit on the front pot of me bike:(
the insides kinda fell out of the nut! dont really want to drain the cooling system so is there any way to repair one of these if not can i ride without it?? ive still got the one on the back pot.
if it has to be replaced are they expensive to buy cause im credit crunched at the mo
i know one sends to give temp readout and one to ecu to switch fan on and off, the latter has not worked for a while and i have a manual switch to turn fan on and off

Glyn I would think because it is a sealed unit (the watercooling system ) quickly pulling temp plug out would not warrant draining down as the water should remain "sealed under vaccum" You may get a little dribble but not much to worry about. 4D

Just changed both sensors on my Bro's ST2

Good info here:

http://www.ducatisti.co.uk/forum/duc...sor-price.html

The baby you need is here:

https://www.simpsonsupplies.co.uk/EN...FIAT_2895.html

All that needs doing is the crush washer filing down ever so slightly and it fitted a treat without any modifications.....

cost: £8.71

Only a few pints of coolant came out, remove upper right dash cover and access coolant top-up bottle (and if necessary - radiator cap) and it could probably with a coolant refresh in any case - or, filter and reuse the old.

Good luck - Frank

(Special thanks for the source to ST guru - Derek)

Glyn,
The 2 sensors on your bike are identical and can be swapped for testing etc.
With your front one knackered, it won't alter anything and you can still ride it - but the "LO" flashing sign on the dash will be permanent.
New ones are about £50, but I love that little link to a Fiat one for £8.50. At that price you can't go wrong.

While we're at it, the common fault that stops the fan is the relay. It's under the seat, easy to get at and costs about two quid (even from a Ducati dealer).

Good luck,
Mike Chadwick

thanks for replies folks
frank that has got to be tip of the week
just orderd the sender from local motor factors £7.57 inc vat!!
are there other examples of interchangable parts? we should compile a list

Make a post in the Technical section with all the details in it.

Try to include the Ducati part numbers if you can (bag them out of the Parts Manuals on the Ducati site).

I did the same last night when looking for the clutch pressure plate bearing.

Glad to be of Help Glyn, thats what the site is all about.....

Derek did ALL the work though, I just passed the info on, he even went into the deep techy stuff which is covered in this attached pdf.

Original Ducati part number is:

552.4.013.1A Water temperature sensor & will cost approx £50 each elsewhere!

Frank,
I haven't looked in on the DSC board for a while and was very pleased to see you give me credit for the water temp sensor info.
Cheers :)

Sorry Guys but did that thread ends in a definitive yes. I could never see if the item mentioned was an exact fit/spec

"All that needs doing is the crush washer filing down ever so slightly and it fitted a treat without any modifications....."

Is that across the face of the washer or around the circumference?

i fitted it to the bike and it worked. it looked exactly the same as the old one i removed.
as for the crush washer i think it is the same size as the ducati one it is just that as you tighten it down it deforms to seal the fit, so looks smaller on the one you remove.
i did file some off the diameter of the washer just to play safe though.it is a very very sft metal. i think that if i had not filed it it would still have deformed to fit the hole.

Glad it all worked out Guys:

Jonny / Glyn:

Maybe it was just a tight fit on my Bro's bike or a poor fit between threads, in any event I filed the outer circ of the washer quite a bit and then wrapped it in PTFE tape. Overkill perhaps but it worked a treat.

Derek:
Welcome back mate, youve been missed!
I'd never dream of taking any sort of credit for your sensor work or external fuel filter mod or headlight suggestions or......

bl00dy 'eck time to stop :lol:

Cheers - Frank

I googled a # Derek had posted for this switch, and came up with a few hits for BMW's, Volkswagon, Citreon, etc.
Found it at the auto parts online for $16.76 US, ordered a couple for myself for my 99 ST2. The fan seems to be coming on later than I like. New +/- errror was listed at 3.4'c at 100'c, fiqure 2 sensors with some age on them maybe 10'c or more possible error. I'll change them and feel better, hoefully run cooler.
My fan isn't going on until 221'f, but the bike is running between 155-180'f [so far, just got it going 450 mi. ago]and I live in the desert.
0-280-130-026 Bosch not sure if this is the long or the short one.

what if the fan goes round but not as fast as it does when you put 12 v direct to it ?

Probably a dodgy relay, but possibly the connections to the relay or to the fan.

it starts and eventually gets to a speed where you cant see the blades but previously you could hear it when sat on the bike with the engine running and helmet on. Now you cant hear it at all and the temp keeps on rising albeit not as fast as when it didnt work at all.

The only things between the fan and the battery are the relay, 2 fuses and various connections. The 7.5A fuse is under the seat alongside fuel pump and ECU fuses and they are all supplied directly from the main fuse in the fuse box (Fuse 1 = 30A). I think it is reasonable to assume that the feed as far as the fuses is OK or the fuel pump and ECU would also be running at reduced voltage. So the most likely reason is a bad connection at the fuse, check the blades for corrosion, a duff relay, but you said you have repaced it, corrosion in the relay socket, or corrosion in the fan connector terminals.

I suppose it's also possible that the fan bearings are full of crud. Does it spin easily by hand?

I fitted one of these, its a straight swop and it cured my misfire.:)