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General Category >> Rubber Side Down! >> Boiling noise
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Message started by Nick99 on 03/27/14 at 16:28:37

Title: Boiling noise
Post by Nick99 on 03/27/14 at 16:28:37

I just took about a 20 minute ride when I shut down there was a boiling noise coming from the case. I searched and found a post with the same question but did not say what it turned out being. Just put on dyna muffler, 152.5 main jet, replaced head cap, and modified cam chain tensioner. I used suzuki oil the dealership said was recommended could this be the problem. Oh and it's a 1999.

Title: Re: Boiling noise
Post by Oldfeller on 03/27/14 at 16:41:39

Are you running the stock vacuum actuated petcock still?

Title: Re: Boiling noise
Post by Nick99 on 03/27/14 at 16:43:26

Yes raptor will be here tomorrow

Title: Re: Boiling noise
Post by Nick99 on 03/27/14 at 17:22:05

Smells like some gas in oil. Will replace petcock and change oil. hopefully this will fix problem. thank you.

Title: Re: Boiling noise
Post by shorty on 03/28/14 at 08:03:47

sounds like gas being sucked into engine via faulty diaphragm (petcock) or float stuck permitting gas to flood into engine..
did engine seem rich when running?

Title: Re: Boiling noise
Post by Nick99 on 03/28/14 at 10:15:58

New petcock is supposed to be here today so I will get that changed tomorrow and oil changed. How can I tell if it was the float sticking other than just changing petcock and seeing if it happens again.

Title: Re: Boiling noise
Post by swedishbiker on 03/28/14 at 10:27:17

Gas would not boil in the crankcase. Sure you don't have a leaking plug on the head cover. Oil there can boil.

Title: Re: Boiling noise
Post by Nick99 on 03/28/14 at 10:33:12

Just replaced that head plug/cap and its no longer leaking and all the old oil that had leaked has been cleaned up.

Title: Re: Boiling noise
Post by verslagen1 on 03/28/14 at 11:32:14

Not unusual to hear boiling noises in the head, most likely oil.

Oil tends to pool by the valve springs and keep it relatively cool.
on the kickstand, it all drains. So a small amount may boil.

Title: Re: Boiling noise
Post by Nick99 on 03/28/14 at 11:37:12

ok cool! I am smelling some gas in oil so will put on raptor petcock tomorrow and change oil. Thank you everyone.