I can’t seem to figure out why my 420 is not pumping oil into the oil filter cover I thought it was the pump I bought an brand new one from Honda put it in out 3 quarts of oil in and still nothing please someone help me

 

Did you check the oil pump drive when you fitted the new one, to ensure the pump is being driven? The pump should have been primed by pouring some oil into it on assembly. On the suction side of the pump, it must not be able to suck air. If the pipework (if there is any on a 420) or O ring is missed off, it will suck air instead of oil.

 

I did check to make sure it was spinning and it is but I didn’t prime it by pouring oil in it I just put it on and the o rings are fine they brand new so do I need take it back apart and put oil inside the suction side of the pump?

 

Trying to think how the oil system works, If I remember rightly, oil is pumped from the pump into the outside of the filter, then out through the cover, back into the case and out again round the cooler. If so you could probably prime it by pouring oil down the hole at the back of the filter housing.

 

ok I’ll try that but can’t do it till tmr I’ll let you know how it goes

 

that did not work I guess time tare it back apart and check everything you have any idea what to check

 

Everything on the suction side, if the pump is actually turning, it must be sucking air. On earlier Hondas a pipe system crossed inside the clutch cover so, if the pipes were not fitted air tight, it could suck air instead of oil. I don't think the 420 has this, relying on galleries in the castings from pick up to pump. These have ring dowels and O rings to seal the pump ports. There will be a pressure relief valve in the system too, but I would have expected some oil to be flowing, even if this valve is stuck open.

 

I attached some photos of the pump and case I don’t know what I’m looking at but I did turn the engine over with case off and the oil pump is turning

 

here some pictures I took today I don’t really know what to look at

 

I’ve tried to upload pictures to show you the oil pump and where the oil goes into the pump at but it will not let me keeps saying moderator has to approve the post and it been 2 days but anyways I’ve got the cover off I rechecked the oil pump to make sure it was moving when I crank engine over without spark plug in it moved the pump now I’m lost to what to check there so many holes on the engine case I can’t tell which is the oil holes