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Thread: Pulsar 150 engine head query

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    Default Pulsar 150 engine head query

    I had changed the engine head of my pulsar 150 recently, I have noticed the sealent applied by the
    service center guys on and around the head as shown in the picture


    I have seen the same kind of sealent after the head cleaning is done 3 years back.


    Why the sealent is needed there?If this is to prevent engine oil leakage!!!.. Because sometimes when I rubbed my finger on the front head joint
    I see couple of drops of oil accumulated.. I am still not sure is that oil or Grease or something. once I cleaned this, I dont see this happening
    for two or three weeks.




    Is there something fishy? that I need to worry about. please advise.
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    Default Re: Pulsar 150 engine head query

    I think you are taking this way above your head. This is a norm procedure. If the engine oil is not leaking from the head, the sealant and gaskets are doing thier job. Just enjoy the bike.
    Mugesh Sri likes this.
    Everybody has their own version of TRUTH!!!!!!

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    s1d
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    Default Re: Pulsar 150 engine head query

    You had the actual engine head replaced ?
    From your picture, the sealant has been applied (rather liberally by the mech like it was his in laws property) along with the valve cover gasket to minimize chance of leaks. the pulsar's and ktm's are notorious for a slight oil weep from the valve cover sealing surface. Nothing to worry about, a bit of sealant and a new gasket will arrest the weep for good. If the job hasn't been carried out properly of if either the valve cover/head seating surfaces is warped then it might not provide a good seal and you will see a bit of oil weep out now and then. Sometimes certain engine oil brands are also known to cause this weep.
    Keep an eye on it, and if you don't have any other issues but just a negligible weep.. wipe it off and continue using the bike.
    Mugesh Sri likes this.
    The real glory is being knocked to your knees and then coming back. That's real glory. That's the essence of it.

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    Default Re: Pulsar 150 engine head query

    Quote Originally Posted by s1d View Post
    From your picture, the sealant has been applied (rather liberally by the mech like it was his in laws property) along with the valve cover gasket to minimize chance of leaks. the pulsar's
    When ever any covers or enclosures are removed, mostly all of them have required gaskets. We just replace the old one with new gasket while finishing the required job.

    My question is why mechanics apply sealants like Anabond ? Is there any specific reason behind this ? Are gaskets not sufficient ? Please enlighten.

    Thanks.

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    s1d
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    Default Re: Pulsar 150 engine head query

    Quote Originally Posted by karteek View Post
    When ever any covers or enclosures are removed, mostly all of them have required gaskets. We just replace the old one with new gasket while finishing the required job.
    My question is why mechanics apply sealants like Anabond ? Is there any specific reason behind this ? Are gaskets not sufficient ? Please enlighten..
    In some cases the manufacturer recommends using a bit of sealant on certain areas.. for e.g. on a ktm duke/rc it is recommended to use a bit of sealant on the valve cover gasket around the circular areas to make a better seal. If you see the pic posted earlier, you will see a similar design (a circular portion) in the valve cover/gasket and this area seems to need some sealant. Reason, maybe because the clamping force on the valve cover is not very high and thus simply using a gasket might cause tiny weeps. Also these gaskets on the valve cover are rubber which harden over time and lose their efficiency.
    Another reason mechanics use sealant is maybe because they were trained to do so, or they simply want to ensure a better seal and not want to disassemble the engine to change a gasket, this is true especially when you go in for a rebuild involving splitting the crankcase and mechanics will use a sealant while putting the crankcase together.
    Also sometimes it's better to use a sealant in cases where they remove parts and clean out the old gasket using a blade.. this might cause tiny imperfections in the sealing surfaces which a gasket alone might not be able to seal. A bit of sealant will fill up any tiny scratches and provide a better seal. On areas like the clutch cover and the stator side covers, seldom is a sealant necessary, but again if you are frequently having a leak then it's better to put it back together with a bit of sealant.
    Using excessive sealant is not necessary (on the contrary might cause issues such as blocking up oil passages if it disintegrates inside the engine), just a thin layer will suffice.
    ajextreme, Mugesh Sri and karteek like this.
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    Default Re: Pulsar 150 engine head query

    Quote Originally Posted by s1d View Post
    You had the actual engine head replaced ?
    From your picture, the sealant has been applied (rather liberally by the mech like it was his in laws property) along with the valve cover gasket to minimize chance of leaks. the pulsar's and ktm's are notorious for a slight oil weep from the valve cover sealing surface. Nothing to worry about, a bit of sealant and a new gasket will arrest the weep for good. If the job hasn't been carried out properly of if either the valve cover/head seating surfaces is warped then it might not provide a good seal and you will see a bit of oil weep out now and then. Sometimes certain engine oil brands are also known to cause this weep.
    Keep an eye on it, and if you don't have any other issues but just a negligible weep.. wipe it off and continue using the bike.

    Thank you,,,

    Yes the pulsar engine head is replaced.


    The problem is the drops of oil,this get burns due to engine heat and sometimes I am feeling a slight amount of heat on my leg only during the night rides..but this is negligible when I wipe the oil..it's gone.


    Ya Definitely I will keep an eye on it.. and Thanks once again
    Last edited by Mugesh Sri; 02-18-2017 at 03:32 PM.

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    Default Re: Pulsar 150 engine head query

    Nothing to worry, All the pulsar 150 have this issue. Drops of oil coming out that cap Don't panic. Enjoy the ride

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