Bleeding hell!

[muchy_]

I'm about to change my fuel filters for the first time which I can do no probs. I just wondered if anyone knew if I need to bleed the injector pump on my BMC1500 or do I just bleed the pipework through untill I get to the injectors? The reason I ask is that I seem to remember speaking to someone who had broken down due to air trapped in the injector pump.

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[oldharry]

With luck you may get all the air out after changing the filter and bleeding it carefully.

If you do have to bleed the pump, there is a slotted screw in the top of the body of the pump. Slacken it and operate the lift pump until clear fuel is running out of it. Tighten it down again and all should be well. You should not need to bleed the HP injector lines as well unless a lot of air has got in, or the engine has been turned over with air still in the fuel.

If the pump is starved of fuel or suffers an air leak while operating you will need to bleed both it and the injector lines.

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[GrahamSC]

Yes. start at the filters and work towards the pump, bleed the pump, then slacken of the feed pipe at the injector end, turn over the engine with the starter if you have not got a handle, till no bubbles appear at the union, stop, then tighten them up.
Keep clear of the spurting fuel, do not get your face near it. The engine should fire the next time you start it, but it may take a few seconds
Easy
Regards
Graham

<hr width=100% size=1>Never recovered from loss of Tot, 1974

 

[JSB]

I have a couple of basic manuals on the BMC 1.5 (as I have one). The first states"After renewing the fuel filter element, it will only be necessary to bleed the fuel filter points (1 and 2) provided the engine has not been cranked over. 1 refers to the blanking plug and 2 refers to the screw union (where the fuel return pipe is connected to the filter). The other manual states "Slacken the union at the filter end of the injection pump . Operate the lift pump by hand, and when the fuel coming from the slackened union is free from air bubbles, tighten the union. Slacken the plug in the unused connection in the filter head. Operate thelift pump by hand, and when the fuel coming from the slackened union is free from air bubbles, tighten the plug.

Hope this helps.

John

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[Talon]

Also, depending which way your filters are mounted, fill them with diesel before scerwing them on, saves a lot of pumping... [smil]

<hr width=100% size=1>Alex

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