Breathing Problems
Posted: Thu Jul 07, 2016 7:15 pm
I have just re-commissioned a 1961 G80CS scrambler imported from the states and refurbished there (but I don't know when). It's running well now but I have an oil leak from somewhere. The engine leaks when running but is quite dry when left to stand overnight which suggests its a breathing problem. As far as I can tell without dismantling, it seems to be from somewhere between the crankcase and the primary chaincase (alloy).
Before I go any further with the investigation, does this ring any bells with you experts? I'm not clear as to how the engine is meant to breathe and the workshop manual is not particularly helpful on this one. Any tips or thoughts before I start tearing things apart would be much appreciated. I'm running the beast on 30 grade Castrol. All I can see is a pipe from the rear of the chaincase directed towards the back chain, which is presumably to relieve the chaincase of any oil pressure, but I'm not clear how the pressure is meant to get there in the first place.
Also, I have changed the inlet cam to SH (as per exhaust) to calm things down a bit! (Edited by the Advertising Editor to remove an advert which is not allowed on this part of the forum. Guest members can place an advert in the for sale section for a charge of £5, it's free for full members - Clive)
Cheers
Peter
Before I go any further with the investigation, does this ring any bells with you experts? I'm not clear as to how the engine is meant to breathe and the workshop manual is not particularly helpful on this one. Any tips or thoughts before I start tearing things apart would be much appreciated. I'm running the beast on 30 grade Castrol. All I can see is a pipe from the rear of the chaincase directed towards the back chain, which is presumably to relieve the chaincase of any oil pressure, but I'm not clear how the pressure is meant to get there in the first place.
Also, I have changed the inlet cam to SH (as per exhaust) to calm things down a bit! (Edited by the Advertising Editor to remove an advert which is not allowed on this part of the forum. Guest members can place an advert in the for sale section for a charge of £5, it's free for full members - Clive)
Cheers
Peter