New to me '85 E35 w/5421 M25 engine. I have been told to bleed the air out of the fuel filter with a new spin-on filter. How do I do that and where do I bleed the fuel? Picture of bleed valve? Thanks folks!
Might be similar to our M25XP.
With the key on to activate the 'Facet" electric lift pump, I could hear the soft clicking of the lift pump holding pressure, and then open the knurled little valve knob right by the high pressure pump, and this would let fuel fill up the system/filter housings to that point and be routed back to the tank.
After a minute, close that valve and the clicking of the pump almost stops.
Only unpleasant part is also listening to the irritating buzz of the 'low oil pressure' alarm, since the engine is not operating even tho the key is 'on'..
At that point, go ahead and glow plug for ten seconds and hit starter button. Should run fine. Usually, unless there is still some air in the line......
Fuel Bleeding Questions I've had to bleed the fuel lines on my M-25 twice in the last month: Once after changing the engine-mounted fuel filter, and once after running it with the fuel SOV closed (I've graduated to the "those that will" camp). I'll need to bleed it again after I change the...
Great info Kenneth. Does anyone know the metric/sae size of the bleed bolt on the top of the spin-on filter housing...?
Loren confirmed there is a knurled knob at the injector bleeder.
I will try to bleed first at the filter housing, then the injector bleeder. Hope that works.