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Discussion Starter · #1 ·
Hi guys for k6 1000
The head is ok, but I have seen this know,the barrels got a deglaze prior and after 2-3 k we can see this
Fine or is the engine ready for more parts? Cheers
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I don't know much about internals Dany. How did the plugs look when you took them out? What prompted investigating here? The carbon deposits on the back of the intake valves are wierd. Have you had fuel issues or running rich?
 

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I would take all needed measurments (cyls bore, pistons, rings, pins) and compare those with the reference data from manual. Then I could make decission about repair. If bore under limits I would makes walls renewal by very light honing as max (in case of iron liner). I don't know this engine has an iron liners or has an aluminium monoblock
 

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Bought the engine second had
Did lower rebuild but knock is still there
Flex honed barrels and with less than 2k km the marks are there
That marks look likes a result of overheating or oil starvation (clogged oil jets maybe?). Have you a photo of the corresponding side of the piston?
 

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Discussion Starter · #8 ·
Oil jets are ok,I'm also running an ape high oil volume gear and relief valve
I have overall higher oil pressure
Will take pistons out and measure

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My valves are heaps worse then that. But the engine still runs good though.
I've had my crank vent hose disconnected for the last 40K, after i cleaned my valves. But they are
back to about the same now. So the carbon is not coming from the crankcase pressure, but more
likely valve stem seals (as mentioned above).

But from your other post, you mentioned that you changed the valve stem seals. So i'm not sure
whats going on there. Maybe yours is coming through the crank case?

Also, the knocking sound from your other video, could it be from the clutch area?
Is the knock worse with the clutch lever pulled?
There was a guy on here who had loose pins on the back of his clutch basket.

Just a thought.
 

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Intake valves full of carbon View attachment 299936 View attachment 299937

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If you remove the stator cover I know on my K7 I can actually inspect the rods and lower cylinders with a flash light behind flywheel. Deff cyl # 1,2 cyl 3,4 might be harder to inspect. I do see that triangler mirror finish on wall in the bore which looks polished.
 

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Discussion Starter · #14 ·
My valves are heaps worse then that. But the engine still runs good though.
I've had my crank vent hose disconnected for the last 40K, after i cleaned my valves. But they are
back to about the same now. So the carbon is not coming from the crankcase pressure, but more
likely valve stem seals (as mentioned above).

But from your other post, you mentioned that you changed the valve stem seals. So i'm not sure
whats going on there. Maybe yours is coming through the crank case?

Also, the knocking sound from your other video, could it be from the clutch area?
Is the knock worse with the clutch lever pulled?
There was a guy on here who had loose pins on the back of his clutch basket.

Just a thought.
The knock is the same

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