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water pump failure. Does it happen.

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Throbbing-Twin View Drop Down
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    Posted: 28 Jul 2015 at 22:41
Hi all. Back again with what may be another daft question.

Here goes.
My 99 RSV MILLE has started playing up. Symptoms are in warms up allot quicker than it used too and generally runs hotter than it used too. Started experiencing this a few weeks back when we had the hot weather but now it's cooler again it's not how it used to be. Used to sit at about 65 degrees cruising on the motorway. Now in lucky if it stays below 80. Hasn't had any spannering recently so can rule that out as not bad maintenance. Checked oil and coolant and levels all correct and oil is oil and coolant is coolant with no contamination between the 2. Cooling fins on rads and oil cooler clean and not clogged up so have decided it's not that. Fans kick in arround 94 and run and stop fine so my only thoughts is has my impellor on my water pump failed or could it be something else. All advice and suggestions welcome. Also is it easy to get too to check and remove etc. Handy with my spanners etc but can't find my manual lol.
If its not broken then fix it until it is
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TasRSV View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TasRSV Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2015 at 06:43
Hi TT

Have you checked that all of the relevant water pipes are getting warm? Blockages or an air lock would show up there (although I would not expect that to occur without some visible leakage). If it is maintaining temp and the fans cool it down it is unlikely to be the water pump.

Might be the thermostat. It sounds like you had a low temp version fitted (they are supposed to open at 65 degrees C; standard is 75). It is certainly easy to test - take it out and put it in a pan of water, heat it up and check the temp it opens with a thermometer. The housing is on the right side of the bike (as you sit on it) and will only require the removal of three clips. Make sure you have replacements available - the OE is not reusable. It's part 15 in the attached.http://www.af1racing.com/store/Scripts/prodList.asp?idCategory=924

Cheers

Dave
www.apriliaperformance.co.uk
www.apriliaforum.co.uk
www.apriliaownersclub.co.uk
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RSV_Ecosse Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2015 at 06:43
Fans should kick in @100 deg C. Most folk find they trigger at about 97 deg C. Normal running temp at cruising speed is usually around 74-76 deg C, so your previous figure of 65 deg C sounds a wee bit low. To that end I'd agree with Dave, sounds like you might have a low temp thermostat fitted. 

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Throbbing-Twin View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Throbbing-Twin Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2015 at 08:11
Cheers for the replies lads. I had initially thought it could have leaked somewhere and then pulled air in when cold to possibly cause an air lock but system is full to the brim and not lost any plus no visible leeks. As for possible blockage I suppose it can happen but can't think how as system hasn't been open for months so really can't see it being that. Planning to do clearances next week so will have a check on the thermostat and maybe replace while I'm at it. Just seems a bit odd. Sometimes I scare myself by thinking too much lol. If cooling system seems to be working then is something else causing it to get hotter quicker by overheating. I hate my brain sometimes.
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grumpy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote grumpy Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2015 at 08:43
Are you sure both fans are running? One of mine failed last year and the bike ran a good 5 - 10 deg higher.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 4vr Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2015 at 11:00
coolant has a life span, flush it with flush and refill, even with inhibiters, you still get a build up of crap, even more so if you use tap water, do the simple things first!

if you plan on keeping the bike use waterless coolants all my bikes runthem including my MV it never over heats, where as before it blown hoses off trying to get into oulton park in traffic

cheers
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Post Options Post Options   Thanks (0) Thanks(0)   Quote legend88 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2015 at 11:28
Originally posted by 4vr 4vr wrote:

if you plan on keeping the bike use waterless coolants all my bikes runthem including my MV it never over heats, where as before it blown hoses off trying to get into oulton park in traffic


Nice to here positive actual experience of waterless coolants on here as it has been debated many times and I am determined to try it at some point.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote 4vr Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2015 at 11:35
i even run my 2mokes on it, the stuff works, i tested that by removing cap at high temps and no gas build up, evans do a low viscosity as well, my MV didnt like the thick stuff rang them up and they sent 5l free of charge, didnt even cost me postage!!

my v4 is on the stuff!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote legend88 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2015 at 11:45
Which version  are you using in the V4 - The 'Power Sports R' ?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 4vr Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2015 at 11:50
im using a mix of the 180 cool and low viscosity they sent me
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Post Options Post Options   Thanks (0) Thanks(0)   Quote legend88 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2015 at 12:01
For ref, when you say the MV didn't like the normal spec what symptoms did it display and what is the low viscosity stuff called?

Sorry for the thread hijack TT



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Post Options Post Options   Thanks (0) Thanks(0)   Quote 4vr Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2015 at 12:58
running hotter , at motorway speeds still sat a 90 degrees, so thick for the impeller, changed for LV coolant, back to normal

on the v4 i dooont have the swelling on the left hand hose as i did before
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 4vr Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2015 at 12:59
it was just called low viscosity by hydratech!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote legend88 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2015 at 13:19
Good info for the memory banks - must try it soon.

In my research, Evans do say that the waterless coolant can run slightly hotter as it is more effective at taking heat out of the engine, and it is the coolant temp you are measuring not the engine temp (Which may actually be lower than before). However you have real life experience and I have only read their website that's why your info is so useful.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Throbbing-Twin Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2015 at 17:55
Interesting info. Might try some unless I find a problem when I get to look at it properly. Both fans working fine.
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