SOHC.co.uk Forums > CB350/400
CB400/4 ENGINE STRIP, ASSESSMENT AND REBUILD BY JULIE - NOW COMPLETE
Woodside:
me too took my old fireblade for an mot this morning...les than a mile from my house just got in and ive clocked up 110 miles....i have been thinking of selling it now im thinking perhaps not
Nurse Julie:
--- Quote from: Woodside on October 14, 2017, 03:19:25 PM ---me too took my old fireblade for an mot this morning...les than a mile from my house just got in and ive clocked up 110 miles....
--- End quote ---
So you were out for just over 5 minutes then Jason ;D ;D ;D
Woodside:
hhmm awol 3 hours
almost ended up in brighton
Nurse Julie:
--- Quote from: Laverda120 on October 14, 2017, 11:53:27 AM ---John,
There is an oil bath of sorts in the 400 head directly below the camshaft. From memory I think only the cam lobes themselves dip into the oil in the bath as the cam spins.
As the oil sprays out of the drillings from the spray bar over the cam it collects in the oil bath to a certain level. When the level is reached the oil runs back down into the engine. Maybe Julie has a photo of the top of the cylinder head to demonstrate the theory?
--- End quote ---
I have just put the camshaft back in place to see if I can get any further insight into this. It was impossible to photograph the underside of the lobes in their 'fully down' position and impossible to measure also. To me it looks like there is about 10mm clearance under the lobe to the bottom of the 'bath'. What I did see though is a definite 'tide mark' around the edge of the bath which would suggest that what Laverda120 says is correct, that the cam lobes dip in the oil bath on each revolution and possibly the tip of some of the lobes may sit in oil when the engine is not running (obviously depending on where the cam stops) . What I can't find though is any drain holes out of the baths, so where would the excess oil that is sprayed from the oil arms go when the bath is full?.
Tide mark
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And again
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hairygit:
Most of it goes down the camchain tunnel.
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