is this an oil leak? (pics included)

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workpeter
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is this an oil leak? (pics included)

#1 Post by workpeter » Thu Mar 14, 2019 10:08 pm

After 40 minutes of riding, my bike engine cut out whilst I was slowing down and coming to the end of my journey. I notice all this oily substance (see pictures). If it is oil, why is it coming out of there?
Not sure why the engine cut out, low oil pressure?

I couldnt restart the bike (played around with kill switch, clutch etc). The engine just wouldn't even make a sound (as if the kill switch was on).

Here is the interesting thing, I walked home and came back with only a tiny cupful of oil and put it in the bike. And then the bike starts....
i doubt that was the solution. When i checked the oil levels there was lots of oil in the bike.

Any ideas?

I recently had an oil change.
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Last edited by workpeter on Thu Mar 14, 2019 10:12 pm, edited 1 time in total.

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Re: is this an oil leak? (pics included)

#2 Post by Tiggie » Thu Mar 14, 2019 10:11 pm

Whats the oil level? has it been overfilled? :|
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Re: is this an oil leak? (pics included)

#3 Post by workpeter » Thu Mar 14, 2019 10:18 pm

Tiggie wrote:
Thu Mar 14, 2019 10:11 pm
Whats the oil level? has it been overfilled? :|
i suspect it was slightly overfilled. The manual says 3.5 litre capacity dry fil, but judging by the oil left in the 4litre bottle which the mechanic gave back suggests maybe around 3.8 litres was put in. However i do trust my mechanic. Do you think that could cause the chain of events I described?

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Re: is this an oil leak? (pics included)

#4 Post by Tiggie » Thu Mar 14, 2019 10:22 pm

I just wondered when you said you had an oil change. have you ridden it since that?

I have heard of older bikes having leaks after fully synthetic oil being used.

I'd wait until someone a bit cleverer than me chimes in first though :lol:
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Re: is this an oil leak? (pics included)

#5 Post by workpeter » Thu Mar 14, 2019 10:27 pm

Tiggie wrote:
Thu Mar 14, 2019 10:22 pm
I just wondered when you said you had an oil change. have you ridden it since that?

I have heard of older bikes having leaks after fully synthetic oil being used.

I'd wait until someone a bit cleverer than me chimes in first though :lol:
Ah ok. I've ridden it about 60miles since the oil change then it cut out. Its got Castrol Power 1 Engine Oil 10w-40 4T inside

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Re: is this an oil leak? (pics included)

#6 Post by Stu » Thu Mar 14, 2019 10:28 pm

certainly looks wet thats for sure!

Its on your radiator though so are you sure its not coolant?

if it is oil then it may well be leaking from the rocker cover gasket
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Re: is this an oil leak? (pics included)

#7 Post by workpeter » Thu Mar 14, 2019 10:40 pm

Stu wrote:
Thu Mar 14, 2019 10:28 pm
certainly looks wet thats for sure!

Its on your radiator though so are you sure its not coolant?

if it is oil then it may well be leaking from the rocker cover gasket
Do you think it's related to the bike cutting out and not starting up until later in the day?

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Re: is this an oil leak? (pics included)

#8 Post by Stu » Thu Mar 14, 2019 10:42 pm

workpeter wrote:
Thu Mar 14, 2019 10:40 pm
Stu wrote:
Thu Mar 14, 2019 10:28 pm
certainly looks wet thats for sure!

Its on your radiator though so are you sure its not coolant?

if it is oil then it may well be leaking from the rocker cover gasket
Do you think it's related to the bike cutting out and not starting up until later in the day?
Its hard to say!

if the bike is carbed then it could be carb icing in this weather!

It could also be a blocked tank breather stopping fuel flow

It could be that the oil/water thats on the rad could have wet the plugs causing it to stop!

Although if there was nothing on the starter it could be something totally different
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Re: is this an oil leak? (pics included)

#9 Post by workpeter » Thu Mar 14, 2019 10:51 pm

i notice the water coolant is just hovering over the low line. is it worth doing a flush and top up?
My bike engine heat indictor is often in the red.

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Re: is this an oil leak? (pics included)

#10 Post by Stu » Thu Mar 14, 2019 10:54 pm

Personally I would get it to someone who knows what they are looking at

Its hard to recommend what to do with things like this through the internet

you need to know what problems you have before just flushing things and stuff

Stick you location in your profile as someone may well be close by will to take a look for you
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Re: is this an oil leak? (pics included)

#11 Post by fastbob » Fri Mar 15, 2019 8:11 am

Surely if you rub the liquid between your fingers you would be able to tell whether it's oil or coolant . What's the oil change capacity with a filter change ? I wouldn't automatically assume that the bike cutting out is in any way related to what you have found . You discovered the leak BECAUSE you were looking for clues as to why the bike cut out . The secret to fault finding is to be totally logical and assume nothing .

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Re: is this an oil leak? (pics included)

#12 Post by Six30 » Fri Mar 15, 2019 9:40 am

Top tip .... Try cleaning the bike now and again and you will come across any thing that might need attention :thumb:
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Re: is this an oil leak? (pics included)

#13 Post by fastbob » Fri Mar 15, 2019 10:08 am

Six30 wrote:
Fri Mar 15, 2019 9:40 am
Top tip .... Try cleaning the bike now and again and you will come across any thing that might need attention :thumb:
Very sound advice .

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Re: is this an oil leak? (pics included)

#14 Post by workpeter » Fri Mar 15, 2019 10:22 am

So interesting development.

Was riding to work this morning and the engine heat indicator was off the charts!
I highly suspect the coolant has leaked away, which I think was that stuff coming out of the radiator last night and maybe why the engine cut out if an onboard CPU detected serious overheating?!

We did an experiment today where we put fresh water into the coolant system, and then we immediately notice it leaking from the inlet tube seal. Its this rubber tube which feeds the coolant into the radiator and the tube is fastened on with a PVC clip. So I'm gonna buy a replacement clip today and retighten it.
https://cpc.farnell.com/domus/125-4/4-r ... pvc%20clip

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Re: is this an oil leak? (pics included)

#15 Post by workpeter » Fri Mar 15, 2019 10:26 am

actually on seconds thoughts im probably wrong. Looking at the picture from last night, the leak was coming from the radiator, not the pipe. So maybe what i saw this morning was it leaking from the radiator onto the pipe.