[sagarpadaki]

Originally Posted by voodoochild

I'm guessing the Rs.1800 doesn't include the price of the valves etc? An ASC is always a safer choice, especially when its a difference of just 800 bucks. Most Bajaj ASCs have received mixed reviews, but I would second svsantosh's opinion on AutoService Banashankari.

Cheers
Rahul

No,the price is including the valves,all inclusive.Will get it done at nearer RV bajaj as autoservice is far off for me

[sagarpadaki]

UPDATE:

Got the head overhauled done along with new valves+lapping,timing chain,tensioner,springs,and other small stuff.
Bike has become a lot lot smoother and revs up very fast(than before).No oil consumed till now(300 kms run).
Bore and piston were is perfect condition.Checked it personally.No cracks or deformations.
Job done at bajaj service center

Total damage to pocket:2300 rupees.

Thank you guys for your valuable guidance and suggestions

[sagarpadaki]

The oil drinking problem has reappeared! The over hauling was done at 26k km and now the bike is at 35k km. For the past 4k km the bike has been consuming oil at the rate of 250 ml per thousand km run. Now that's a lot of oil.

I have been using motul 5100 semi synth since the over haul has been done. Strangly there is no white smoke whatsoever from the exhaust!!! I am clueless as to what to do now. Where else could the oil be disappearing? I even tested for smoke from exhaust after a long 50 km drive. But there is none and the oil is still disappearing.!

[IndigoXLGrandDi]

Originally Posted by sagarpadaki

UPDATE:

Got the head overhauled done along with new valves+lapping,timing chain,tensioner,springs,and other small stuff.
Bike has become a lot lot smoother and revs up very fast(than before).No oil consumed till now(300 kms run).
Bore and piston were is perfect condition.Checked it personally.No cracks or deformations.
Job done at bajaj service center

Total damage to pocket:2300 rupees.

Thank you guys for your valuable guidance and suggestions

If the Bore and Piston were in Perfect Condition, were not they replaced last time?

You got Head overhauled done. What was actually done apart from what you mentioned above?


Did you check for any leakages from around the Cylinder Head?

I am facing leakage from Tappet Cover in my Feb 2007 180 UG-3. I am yet to confirm it from my local garage.

[sagarpadaki]

Originally Posted by IndigoXLGrandDi

If the Bore and Piston were in Perfect Condition, were not they replaced last time?

You got Head overhauled done. What was actually done apart from what you mentioned above?


Did you check for any leakages from around the Cylinder Head?

I am facing leakage from Tappet Cover in my Feb 2007 180 UG-3. I am yet to confirm it from my local garage.

No bore and piston were not replaced .They were de-carbonised,head was decarbonised new valves were put and lapping was done.Along with it few parts mentioned in the post were changed. There is no leakage whatsoever from the cylinder head cap,nor near the spark plug! No leakage ,no smoke but still oil is disappearing.No loss in pick up,no slugishness nothing. It still hits 110 kmph with relative ease.
I am baffled!

[IndigoXLGrandDi]

I came across similar query for Yamaha R15 in Autocar India's Feb 2012 issue.
The R15 used to consume engine oil in large amounts (the exact figure of oil consumption was not given by the owner).

On this ACI replied "It could be something like a blown crank-case oil seal or even worn valve stem seals, for a motorcycle should not usually damage its piston rings so early in its life. This is a problem that can only be correctly pinpointed after opening out the engine, and examining parts for wear or damage.
The best way to avoid such early wear is to change your engine oil regularly, at most within 5000km. ...... Another thing to keep in mind is to never push the motorcycle hard without a good warm up. Go easy for at least the first ten minutes of riding so the oil temperature/viscosity can reach optimal levels. Immediately getting astride and hammering the bike can cause this kind of irreversible wear."

Are you sure that the Valve stem seals were replaced while replacing the valves?
Have you checked for Blown crank-case oil seal?

[sagarpadaki]

Originally Posted by IndigoXLGrandDi

I came across similar query for Yamaha R15 in Autocar India's Feb 2012 issue.
The R15 used to consume engine oil in large amounts (the exact figure of oil consumption was not given by the owner).

On this ACI replied "It could be something like a blown crank-case oil seal or even worn valve stem seals, for a motorcycle should not usually damage its piston rings so early in its life. This is a problem that can only be correctly pinpointed after opening out the engine, and examining parts for wear or damage.
The best way to avoid such early wear is to change your engine oil regularly, at most within 5000km. ...... Another thing to keep in mind is to never push the motorcycle hard without a good warm up. Go easy for at least the first ten minutes of riding so the oil temperature/viscosity can reach optimal levels. Immediately getting astride and hammering the bike can cause this kind of irreversible wear."

Are you sure that the Valve stem seals were replaced while replacing the valves?
Have you checked for Blown crank-case oil seal?

Now that you said it ,today I noticed a burning smell from the engine, not from silencer but from the engine, around the area where the engine oil is poured ,ie ,the bottom part of the engine. This is after a a long drive of 25 km in heavy rain .

This has got me thinking if its indeed the crank case seal. Could there be any other possible explanation for the smell?

[rajivanoj]

Originally Posted by sagarpadaki

Now that you said it ,today I noticed a burning smell from the engine, not from silencer but from the engine, around the area where the engine oil is poured ,ie ,the bottom part of the engine. This is after a a long drive of 25 km in heavy rain .

This has got me thinking if its indeed the crank case seal. Could there be any other possible explanation for the smell?

I too have this same problem in my CT 100, for a year, It gives noise and low in pickup, then i came to know, there is almost no oil. But there is no oil leak in underneath, and no smoke in silencer. Then once i filled up the oil it runs smooth. Then oil vanishes in about 4000 kms. I am confused what to do. I got the crank redone twice, but the mechanic did not find any other mistake in the setting.

[a4anurag]

Originally Posted by rajivanoj

I too have this same problem in my CT 100, for a year, It gives noise and low in pickup, then i came to know, there is almost no oil. But there is no oil leak in underneath, and no smoke in silencer. Then once i filled up the oil it runs smooth. Then oil vanishes in about 4000 kms. I am confused what to do. I got the crank redone twice, but the mechanic did not find any other mistake in the setting.

Are you sure there is no whitish-blue smoke coming out?

Have you checked the piston rings?

Anurag.

[rajivanoj]

Originally Posted by a4anurag

Are you sure there is no whitish-blue smoke coming out?

Have you checked the piston rings?

Anurag.

yes anurag, i am 100% sure, there is no smoke, its not visible. as in normal 4 stroke bikes. If there is smoke , we can be sure that rings are weak and have to rework the cylinder, piston, rings etc. But there is no smoke. What are the other options?

[a4anurag]

Originally Posted by rajivanoj

yes anurag, i am 100% sure, there is no smoke, its not visible. as in normal 4 stroke bikes. If there is smoke , we can be sure that rings are weak and have to rework the cylinder, piston, rings etc. But there is no smoke. What are the other options?

How is the cylinder head casing and crankcase appear?

Do they have oil stains + dust on them?

Anurag.

[rajivanoj]

Originally Posted by a4anurag

How is the cylinder head casing and crankcase appear?

Do they have oil stains + dust on them?

Anurag.

yes, there is oil strain and it is like dried oil and baked, it is near the join of cylinder and top, i think its head. how to rectify it? whether have to shape it again for any defects in smooth surface?

[a4anurag]

Originally Posted by rajivanoj

yes, there is oil strain and it is like dried oil and baked, it is near the join of cylinder and top, i think its head. how to rectify it? whether have to shape it again for any defects in smooth surface?

Change the head gasket and that should address the oil leak from the head.

Anurag.

[ArizonaJim]

Something that has not been mentioned in any of the posts in this topic is "blow by".

Most of the posts have indicated there is no smoke coming from the exhaust. I assume this is when first starting the engine and (hopefully) when the motorcycle is being ridden down the road. (I have seen cases where there was little or no smoke when the engine is first started or idling. The oil burning was done while the motorcycle was being ridden at speed and of course the rider was busy watching where he/she was going so they didn't see it.)

A quick test to see if the engine is burning oil is to remove the spark plug and examine the electrode area. If the engine is burning oil, the tip will appear wet in addition to the normal build up of carbon.

Assuming there is no white smoke from the exhaust at any speed and there is no "wet" layer of oil on the outside of the engine exists, blow by is the next likely candidate.

Blow by is a term used to describe high pressure gas bypassing the piston rings and ending up in the crankcase.

Under normal conditions there is always a little bit of blow by because the piston rings cannot totally seal the high pressure gas.

If the piston rings and/or the cylinder have become worn because of dirt, lack of oil or just the distance ridden, they will allow considerable leakage of this gas.

The crankcase is always vented to allow any blow by gas leakage to escape.

Because the gas is passing thru the crankcase where there is a virtual cloud of oil mist flying off of the crankshaft and connecting rod it always carries some of this cloud of oil with it.

To reduce air pollution, the crankcase vent us usually directed into the air filter area so the engine can breath it in and burn it.

While this causes no problem for a new engine, one that is worn and suffering from excessive blow by can end up with a oil soaked air filter which ruins power and economy. To "fix" this problem, some people remove the crankcase vent hose from the air cleaner area and just direct it overboard to the ground resulting in oil loss that has no apparent cause and no "tell tail" evidence left behind.

The only real solution to excessive blow by is to have the piston rings replaced and the cylinder honed or re-bored if it is worn but before doing this, ride the motorcycle to warm it up. Then remove the vent hose from the air filter connection and start the engine.
Rev it up, watching the gas escaping from the vent hose. If it is excessive and cloudy, you have found the problem.

[a4anurag]

Originally Posted by ArizonaJim

Something that has not been mentioned in any of the posts in this topic is "blow by".

Thanks buddy, learnt a new term and its meaning after reading your post. AFAIK this could be there for cars to then?

Originally Posted by ArizonaJim

A quick test to see if the engine is burning oil is to remove the spark plug and examine the electrode area. If the engine is burning oil, the tip will appear wet in addition to the normal build up of carbon.

+1, hence loss in power and pick-up.

Originally Posted by ArizonaJim

To reduce air pollution, the crankcase vent us usually directed into the air filter area so the engine can breath it in and burn it.

Are you sure about this?

Of all the bikes I have seen till now have their crank case breather tube dangling below between the crankcase and swingarm joint. This pipe is coupled and held together along with the battery breather tube.

Anurag.