Honda-SOHC
SOHC.co.uk Forums => CB750 => Topic started by: philward on February 22, 2017, 06:46:05 PM
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I've just fitted engine/pump and although I'm no where near start up (need sump on to route CR exhaust system) I have taken the general forum advice and packed the pump with vaseline. Can the experts on pump priming confirm that you just pack all the rotors/gallery's - ie there's no special technique?
Thanks
Phil
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From the £ shop and just pack it in before putting the pump back together.
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I've just fitted engine/pump and although I'm no where near start up (need sump on to route CR exhaust system) I have taken the general forum advice and packed the pump with vaseline. Can the experts on pump priming confirm that you just pack all the rotors/gallery's - ie there's no special technique?
Thanks
Phil
Is this a better method than just submerging it in oil and turning it to get all the air bubbles out?
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Oil will just run out the pump with gravity ;) Don't ask me how I know this :) :)
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Submerge pump in oil turn it over an lift the oil stopper/leak valve (very thin screw driver) turn the pump and immediately you will see the air bubble gulp out, release the valve you will instantly feel the extra resistance, I have done this many times and learned it's the only way to get the oil pressure up quickly
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That is fine, as long as your not building engines and sitting them on shelves for six months +.
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I had a problem every time, despite priming and trying vaseline.
Only thing that worked was making up an adaptor using a tubeless car tyre valve in rubber pipe and pressurising oil tank via the breather.
With plugs removed was able to get oil pressure light out before starting
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See my solution here. last post tells how i finally got mine going!
http://www.sohc.co.uk/index.php/topic,11713.msg90871.html#msg90871