SOHC.co.uk Forums > CB750
Help! What's caused this?
Nurse Julie:
With the oil pressure switch being situated in the top crank case, all it shows it that you have pressure to the bottom end of the engine. It's definitely oil starvation that's caused that. That's a great shame, I bet you are totally gutted. I'm assuming you could get the rocker cover off without removing the engine with the frame being slightly modified, which is a major result.
haynes66:
i was told by an old honda guy to turn the engine over with the rocker cover caps off to see if oil arrives at the head. i assume that's a good idea?
Nurse Julie:
--- Quote from: haynes66 on March 25, 2022, 04:36:29 PM ---i was told by an old honda guy to turn the engine over with the rocker cover caps off to see if oil arrives at the head. i assume that's a good idea?
--- End quote ---
Yes, it is. Always take the 2 end tappet caps off and make sure the oil is getting up there on both sides before riding the bike and putting the engine under load.
K2-K6:
--- Quote from: haynes66 on March 25, 2022, 04:36:29 PM ---i was told by an old honda guy to turn the engine over with the rocker cover caps off to see if oil arrives at the head. i assume that's a good idea?
--- End quote ---
sensible containment definitely.
Core cause, absolute, paranoia over making sure there's nothing in the oil distribution system to travel up that route and get caught by the restrictor coming into the head.
It's there to preserve pressure at the crankshaft, the head being effectively open bath type distribution, the restricors set the boundary between the two.
Bryanj:
I have even seen bits of old scraped off base gasket block a jet
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