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Most of it goes down the camchain tunnel.Sent from my X6pro using Tapatalk
Quote from: Laverda120 on October 14, 2017, 11:53:27 AMJohn,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?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 (Attachment Link) And again (Attachment Link)
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?
Quote from: Nurse Julie on October 14, 2017, 04:33:58 PMQuote from: Laverda120 on October 14, 2017, 11:53:27 AMJohn,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?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 (Attachment Link) And again (Attachment Link) Like the 500.there is no drain. It is a mini sump to provide oil to the cam after standing. During start up before the oil pressure builds up.a simple method to protect lobes and followers. During running the oil gets splashed Arround and lubricants valves. Chain. Before returning to the sumpSent from my SM-G361F using Tapatalk
Don't do what I did and fit the restrictors wrong way up, they get bent and when you try to straighten them they break.They have to go with stem downward.Luckily I was just doing a dry assembly so spotted it.
Apart from the obvious problem you have with the engine, and as you feel it's not been rebuilt prior to this, it appears that it has been run on oil of decent condition as all the tell tale wear points seem in very good condition.
Have you got any theory as to how the pistons got like that?