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1976 CB550F1 (what have I let myself in for) Project
eight0:
So the bike has a bit of a bad oil leak.
It appears to be coming from the base gasket, it leaks all around it when it's been running. You can just see it in this photo where it's leaked over the top case. It also leaked from both sides and dropped around the alternator cover and points cover.
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When it's cold and sitting it still leaks but not from the base gasket, it comes from the left side off the bottom of the oil pan.
Tackling the base gasket first, should I re-torque the head?
Bryanj:
You can try but i doubt it will cure it
eight0:
Oh that's not good. What usually causes that then and what's the fix?
Bryanj:
Hadnt magnified it enough to see that, yes there is an O ring in a groove but i think that washer is steel, its the one on the top bolt that is soft. Either way it should not have a spring washer and the bolt slotlooks chewed
eight0:
Well I found the cause of the major oil leak, the drain on the oil pump wasn't snugged up completely. I was still getting oil pressure so I hope it hasn't starved the engine at all.
There doesn't appear to be any oil leaking from the top tensioner nut but I've replaced the bottom spring washer with a copper one and it seems to be better. It's possible I've missed the rubber O ring on the inside, I really can't remember. I'll have to live with it until I can bring myself to dive back into the top end.
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