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**antz.bin** · 06-05-2012, 09:23 PM

Query Approved

**Niks TheGame** · 06-06-2012, 12:35 AM

Mate...

I am also kin of experencin this issue..i hve completed 1400k on v 2.0 ... prior getting the first service i was gettin this issue ..after runnin aroun 5-6 km ..i was feeling the heat frm the right side....now its bit improved after 1st service..but still it gets heated up after 11 km around... that wasnt the case with v 1.0 ... i too had it .... go SVC and get the oil chked...

**Juris** · 06-06-2012, 01:42 AM

Originally posted by ashaq54 View Post

Hi All,

a week ago, just after riding 5 KMs, suddenly the Engine Overheating light came-up. I immidiately parked the bike on the side of the road and kept it shut down for a minute or two. once, firing up the engine again, the Engine Overheating light was still ON. took the bike a few hundred yards ahead to my office parking lot and only then noticed that, the radiator coolant was overflowing through the drainage pipe at the bottom of the bike. i am familiar with spillage of 1-2 drops, but it was quite a bit today. got quite confused/horrified as in my 3 years of riding the R15s (the version 1 for 2 years and this new one for the last 4 months), i have never experienced the lighting-up of the Engine Overaheat light. so, took the bike to the SVC and they checked the radiator, coolant level and the fan inside and the light never cam up again. plus, the fan was running nice. so, topped up the coolant and came back to office, a 10KM ride that took almost 2 hours in bumper-to-bumper traffic, the overheating light never came up again and I could hear the fan running.

this morning again, the engine overheating light came-up again just after a ride of 4 KMs and waiting at Bumper-to-Bumper traffic for a few minutes only, although I could see, hear & feel the radiator fan running. the light came up and stayed for 2-3 minutes then it went off as if nothing has happened. no coolant spillage or overflow this time.

however, during the gap of one week, i could feel clearly that the right side of the engine/fairing was getting much hotter than usual even after short rides of 5-7 KMs. this is the second time in a week the engine overheating light came out and since, this is quite unusual for me, i am getting a bit nervous about my bike.

now, i would seek your opinion since, some of you might have had experienced it randomly. please do let me know if any of you have experienced it and please assist me to calm down a bit.

Are you talking about Engine warning light(orange one) or engine overheat light(red one). I had a similar issue almost 2 years back when entire coolant was flushed via drainage pipe. The bike was thoroughly inspected at the SVC and the culprit was faulty coolant temperature sensor. If the orange light is coming than you can check for error code and verify in the manual for corresponding sensor issue. If the red light is coming than I am pretty sure the head gasket is gone and because of vapor lock the coolant circulation is barred. Result overheating and frequent fan kick ins. Get the bike inspected for gasket and/or coolant temperature sensor.

**Honda_CBF** · 06-06-2012, 07:54 AM

@ Ashaq,
sorry mate my post isn't much of your help just some advice:
get your bike thoroughly checked, as stated by other members issues can be caused by busted gaskets or malfunctioning sensors or can be caused by fueling issues (lean mix??).
And I think your coolant level was above max mark (when coolant leaked) what happens is with increase in temperature things expand, so coolant quantity increases.. And when there's no room for the increased (expanded) quantity, it leaks out.

**ashaq54** · 06-06-2012, 07:59 AM

yeah..it's the red light on the right.
and, yes, 2 weeks back I had an accident, a minor one, I had to replace the bodykits and then my personal mechanic, who has been working on my previous bike for 2 years, adviced me to replace the gasket. i guess, it's the issue with the gasket now. will check ASAP.

**ashaq54** · 06-12-2012, 08:33 AM

Hi All,

took the bike yesterday to my mechanic's shop. while going to the shop, the overheating light came up just after 2KMs and waiting at a traffic jam for 4-5 minutes. after the jam, took the bike to speeds of 60-70 for few hundred yards and the light went off. 15 minutes later the light came up and went off again.

my mechanic did a thorough check-up of the overall cooling system, topped up the coolant and he said, everything seems fine there. however, while coming back home and going to office, i could sense the bike was heating up more than normal, although the overheating light did not come up yet. also, few drops of coolant was overflowing through the drainage pipe, which makes me guess, that there is some kind of blockage due to which the coolant is not flowing properly. planning to take the bike to SVC on friday to have a detailed look at the gasket.

any insights from you...?

**ashaq54** · 06-18-2012, 06:19 PM

my bike's problem still persists...
there is coolant overflow through the drainage pipe every morning...the engine is getting hotter than usual, just like the first 500KMs..and, the engine overheating light comes up occassionally once i ride through heavy traffic...once the the light comes up it goes off again right after a short ride/burst in free roads...
i did change the engine oil last week, the fan runs well as i can see and hear that..the coolant was topped-up...the coolant system was checked by the SVC guyz and they say it is working fine...

i am quite confused and frustrated a lot.
guyz, can you help me out...?

**Juris** · 06-18-2012, 06:33 PM

Originally posted by ashaq54 View Post

my bike's problem still persists...
there is coolant overflow through the drainage pipe every morning...the engine is getting hotter than usual, just like the first 500KMs..and, the engine overheating light comes up occassionally once i ride through heavy traffic...once the the light comes up it goes off again right after a short ride/burst in free roads...
i did change the engine oil last week, the fan runs well as i can see and hear that..the coolant was topped-up...the coolant system was checked by the SVC guyz and they say it is working fine...

i am quite confused and frustrated a lot.
guyz, can you help me out...?

One question.... Did u inspect/replace gasket... Another thing- check for vapor lock.... When u open the head to inspect the gasket, ask him to drain the coolant from the bore. If the coolant drain is usual than there is no vapor lock. If vapor lock is there u ll get to see coolant splashing suddenly. Your bike is generating more heat or the coolant circulation is not functional. Check these two things and narrow down the problem.

**abhimanyu31** · 06-18-2012, 07:06 PM

Originally posted by ashaq54 View Post

my bike's problem still persists...
there is coolant overflow through the drainage pipe every morning...the engine is getting hotter than usual, just like the first 500KMs..and, the engine overheating light comes up occassionally once i ride through heavy traffic...once the the light comes up it goes off again right after a short ride/burst in free roads...
i did change the engine oil last week, the fan runs well as i can see and hear that..the coolant was topped-up...the coolant system was checked by the SVC guyz and they say it is working fine...

i am quite confused and frustrated a lot.
guyz, can you help me out...?

The fact that the engine temperature is coming down as soon as you are running it on free road shows that your cooling system is working when the bike is on the move. You have also mentioned that the fan starts running when the engine heats up (thereby, showing that the thermostat is working). That leaves 3 possibilities:

1. A weak fan, which is not pulling enough air through the radiator to cool the heated coolant sufficiently.

2. Any wrinkles where the hoses bend which can cause restriction in coolant flow.

3. Any blockages (no likely, but possible), in any of coolant routing passages.

The bottom line is that either coolant circulation is being restricted when the bike is stationary or the cooling fan is not providing enough air circulation to compensate for the bike being stationary.

In addition to the above, the most obvious one but I will still mention it, make sure that the vents in the fairing are not obstructed (do not put any cleaning cloth or such). Those vents are not for show they have a purpose.

**ashaq54** · 06-18-2012, 08:45 PM

Thanks fellow riders.

will visit my mech's shop this friday and will tell him to inspect all these.
the vents are not obstructed. no cleaning cloths there.
vapor lock and/or blocked coolant passage seems to be the potential reason. the fan was working fine for last 3 months, all of a sudden this fan going weak seems unlikely, still, nevertheless, will check that too.

let's see what happens, will keep you posted.

**dpak89** · 06-19-2012, 04:25 PM

@all: I also have the same issue in my 4k kms old V2. Except the fact that i dont have coolant overflow/drain.
I had starting problem, the reason being valve clearance. After this was rectified/adjusted i am having overheating issue! At slow speeds/hills climbing overheating lights up. But while cruising(speed above 60kmph) it never shows up.
Now is there a possibility that head gasket is not proper ?

**ashaq54** · 06-21-2012, 07:22 PM

today, my bike's condition got even worse. after riding for 4-5 KMs the engine overheating light came-up and stayed on. switched off the engine and once started after 3-4 minutes the light was still on. morever, after reaching home, i noticed, the radiator fan was not running.

from another mechanic i heard today that a faulty Radiator Fan Motor Relay could be the culprit. what do you guys think?

taking my beast to the mech's shop tomorrow morning.

**abhimanyu31** · 06-21-2012, 07:39 PM

Originally posted by ashaq54 View Post

today, my bike's condition got even worse. after riding for 4-5 KMs the engine overheating light came-up and stayed on. switched off the engine and once started after 3-4 minutes the light was still on. morever, after reaching home, i noticed, the radiator fan was not running.

from another mechanic i heard today that a faulty Radiator Fan Motor Relay could be the culprit. what do you guys think?

taking my beast to the mech's shop tomorrow morning.

Possible. Ask them to take out the relay and the fan and join it to a 12v source and see if the fan and the relay are functioning.

**ashaq54** · 07-15-2012, 06:35 PM

hi all,

since the SVC could not detect the specific reasons behind my bike's overheating issue, i had replaced both the thermostat and the fan motor relay. since then, the overheating issue seems to have been solved as the overheating light did not come up any more and also the bike was not heating up that much. it was heating up occasionally, like in heavy traffic, but the fan was kicking in and it was cooling off...which was quite normal.

however, the overflow of the coolant through the drainage pipe has been there and, interestingly, it is evident only in the mornings. once i reach my office every morning which is around 5-6 KMs away, right after parking i see several drops of coolant flowing through the drainage pipe. and, it is not one or two drops, it is several drops every morning and there must be many drops while riding too. if this goes on, the entire amount of the coolant will overflow out of the reservoir...and, sooner or later, my bike will again start overheating.

could you please shed some light on this issue...i am getting quite depressed with this issue these days. please help.

regards.

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