lift pump and what im doing wrong

dieselwheasel · Jul 17, 2010

Need help guys, followed the steps on how to change a manual lift pump on my 200tdi. WHen I have the pump in my hand it pumps fuel no problem, as soon as i attach it and tighten it up it doesnt work. The pump handle just goes straight down with no resistance. What am I doing wrong here?

instantsquid · Jul 17, 2010

There's a cam in the engine which operates the lift pump - depending on it's position it may be that it's got the lever fully up, and I think this will mean the handle on the outside won't operate. If you're sure it's fitted properly, give the engine a quick spin. It might well start up without you having to bleed anything - mine did (I fitted a new lift pump last weekend)

jamescronin · Jul 17, 2010

If your worried, open the bleed screw on the injector pump and turn the engine over - a jut of fuel should spray out - and yes if the diaphram is being held compressed by the cam it will not pump very well using the handle

dieselwheasel · Jul 20, 2010

Many thanks guys, I turned the engine over a little bit and it went in a treat. I will probably have to take it off again as I ruined the gasket and it only has sealer on it. But I fitted it replaced all the pipes and hey presto it fired up and is working well again.

lift pump and what im doing wrong

dieselwheasel

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instantsquid

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jamescronin

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dieselwheasel

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