1999 G16 Smoking and using oil

cgtech · 09-19-2019, 01:06 AM

Quote:

Originally Posted by jparker000

I'm not sure of the G16 setup - my G9 has an oil bath air filter with a short hose (maybe 6" long) connecting the filter to the mouth of the carb. If your filter is a dry filter, this shouldn't be an issue.

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They never had a "oil bath" air filter, there's something wrong with yours, possibly oil overfilled.

meimk · 09-19-2019, 06:23 AM

FYI, I have done lots of valve stem seals on the G16 & up engines. Never had to pull the head to do it. I use a leak down tester to run air pressure into the cylinder (through the spark plug hole) to hold the valve itself up in place. I made a valve spring tool out of some scrap metal: notched a "V" in one end and drilled a hole in it to line up with one of the valve cover holes. Pull the keepers & spring, then the seal itself is easy. For whatever reason Yamaha only felt they needed a seal on the intake side, but the same seal WILL fit the exhaust side & I've had a couple smokers that benefitted from adding one.

slowride77 · 09-19-2019, 07:03 AM

Quote:

Originally Posted by meimk

FYI, I have done lots of valve stem seals on the G16 & up engines. Never had to pull the head to do it. I use a leak down tester to run air pressure into the cylinder (through the spark plug hole) to hold the valve itself up in place. I made a valve spring tool out of some scrap metal: notched a "V" in one end and drilled a hole in it to line up with one of the valve cover holes. Pull the keepers & spring, then the seal itself is easy. For whatever reason Yamaha only felt they needed a seal on the intake side, but the same seal WILL fit the exhaust side & I've had a couple smokers that benefitted from adding one.

Wow. Great idea. I would love to see the tool you made to remove the springs. Thanks for the info!

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CP241 · 09-19-2019, 07:11 AM

Quote:

Originally Posted by slowride77

Wow. Great idea. I would love to see the tool you made to remove the springs. Thanks for the info!

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Used to do the same thing in cars back when I worked at the dealership. This is what I used, works great.

https://www.summitracing.com/parts/l...caAuWQEALw_wcB

Theres these kind too, but I always preferred the other one above
https://www.jegs.com/i/JEGS/555/8052...caAqutEALw_wcB

09-19-2019, 06:23 AM	#22
meimk Gone Wild Join Date: Jun 2011 Location: Northern Indiana Posts: 2,823	Re: 1999 G16 Smoking and using oil FYI, I have done lots of valve stem seals on the G16 & up engines. Never had to pull the head to do it. I use a leak down tester to run air pressure into the cylinder (through the spark plug hole) to hold the valve itself up in place. I made a valve spring tool out of some scrap metal: notched a "V" in one end and drilled a hole in it to line up with one of the valve cover holes. Pull the keepers & spring, then the seal itself is easy. For whatever reason Yamaha only felt they needed a seal on the intake side, but the same seal WILL fit the exhaust side & I've had a couple smokers that benefitted from adding one.

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