Strange valve color

[Guest]

Hello :-)
I took apart my cylinder on my GS450.
I found that one of the four valves has an odd brown color.
I am not sure why this is happening, but a guess would be that this valve is stuck, or not closing/opening properly.
Any comments, og guesses ? :-)
Thanks!

2015-01-30 14.34.46.jpg

[trippivot]

that is a good color for an exhaust valve -it is hotter than the intake and it should be. it shows proper heat and mostly complete burn. that is also why exhaust valve lash is wider than intake.

[JEEPRUSTY]

looks normal to me

[mrbill5491]

Yup looks fine to me as well.

[aoywi]

Well, that makes me fell embarrassed ;-)
Thank you very much for your help! :-)

[Nessism]

Since the head is off you might want to service everything and install new valve stem seals. Assuming the previous owner kept on top of valve adjustments you may not have to do much other than just clean everything and lap in the valves.

[aoywi]

Nessism
I was planning on replacing the valve stem seals, as they come with the gasket set i bought :-)
Do you think i need to lap the valves even when they are used ? :-)

[Nessism]

Nessism
I was planning on replacing the valve stem seals, as they come with the gasket set i bought :-)
Do you think i need to lap the valves even when they are used ? :-)

Best thing to do is first remove the valves then inspect everything per the factory Suzuki service procedure. If everything checks out all you have to do is lightly lap the valves and reassemble. If the valves and seats are black and charred looking, you may need to have them professionally serviced before reassembly. Can't say for sure until you take it all apart.

[aoywi]

Best thing to do is first remove the valves then inspect everything per the factory Suzuki service procedure. If everything checks out all you have to do is lightly lap the valves and reassemble. If the valves and seats are black and charred looking, you may need to have them professionally serviced before reassembly. Can't say for sure until you take it all apart.

Okay, guess i have something to do this weekend then ;-)
Thanks a lot!