Duck bill part of non-return (fuel)

tom1979 · Jan 29, 2020

I know it's been discussed on here but again the search function is not working....

The duck bill part of the non-return on the fuel filter housing - is this required ??

Thanks!

jamesmartin · Jan 29, 2020

tom1979 said:
I know it's been discussed on here but again the search function is not working....

The duck bill part of the non-return on the fuel filter housing - is this required ??

Thanks!

its not fitted on many and those that are tend to be deformed to be partially open in any case, i would change the air bleed valve though

tom1979 · Jan 29, 2020

jamesmartin said:
its not fitted on many and those that are tend to be deformed to be partially open in any case, i would change the air bleed valve though

I've changed that - I'm wondering if the filter housing needs to be replaced. I've had a problem when once the D2 has been stood a while there's no throttle response for a few seconds, and runs a bit rough. This morning it roughly started and then died. It had new genuine injector washers and o rings last week. Once it's running it will be fine all day until it's been left for a several hours. If I hadn't done the injector seals I would be doing that next, but they've been done.

jamesmartin · Jan 29, 2020

tom1979 said:
I've changed that - I'm wondering if the filter housing needs to be replaced. I've had a problem when once the D2 has been stood a while there's no throttle response for a few seconds, and runs a bit rough. This morning it roughly started and then died. It had new genuine injector washers and o rings last week. Once it's running it will be fine all day until it's been left for a several hours. If I hadn't done the injector seals I would be doing that next, but they've been done.

unless theres a leak from filter housing theres nothing else can go wrong,air bleed valve rids the system of air if its not blocked, pump or washers id think

tom1979 · Jan 29, 2020

jamesmartin said:
unless theres a leak from filter housing theres nothing else can go wrong,air bleed valve rids the system of air if its not blocked, pump or washers id think

How would the pump cause poor starting but runs fine once started?

jamesmartin · Jan 29, 2020

tom1979 said:
How would the pump cause poor starting but runs fine once started?

they can,id have alook to see if its screens are partially blocked and orange rubber valve at bottom of its housing itsnt stuck open

tom1979 · Jan 29, 2020

jamesmartin said:
they can,id have alook to see if its screens are partially blocked and orange rubber valve at bottom of its housing itsnt stuck open

It's a new pump, but I suppose that doesn't mean much. Whereabouts is the rubber valve on the pump?

jamesmartin · Jan 29, 2020

tom1979 said:
It's a new pump, but I suppose that doesn't mean much

a new good cheap pattern,filter housing is fed by the low pressure pump in tank and also the return from engine ie through the duck bill, when filter is full that feeds the high pressure pump in tank then direct to fpr

Discodevon · Jan 30, 2020

Was it starting ok before the injector seal change Tom?

tom1979 · Jan 30, 2020

Discodevon said:
Was it starting ok before the injector seal change Tom?

It didn't start at all as the engine was knackered so this is another engine with most ancillaries new!

Discodevon · Jan 30, 2020

tom1979 said:
It didn't start at all as the engine was knackered so this is another engine with most ancillaries new!

Ah ok, did you see the engine start and run before you got it mate?

tom1979 · Jan 30, 2020

Discodevon said:
Ah ok, did you see the engine start and run before you got it mate?

Yes but I only used the bottom end, as I had a head on the shelf that had been pressure tested etc. The old engine the injector tip had come away and be swallowed up in Cylinder 1 !

Discodevon · Jan 30, 2020

Maybe check the timing again or try different injectors?

tom1979 · Feb 14, 2020

I’m suspecting valve stem seals

raywin · Feb 14, 2020

You can get new valves here:
https://www.ebay.co.uk/itm/LAND-ROV...VE-REPAIR-KIT-DA3950-/223904782895?nav=SEARCH

I have often wondered about fitting one of these in the fuel line
https://www.ebay.co.uk/itm/6-8-10-1...ve-Petrol-Diesel-Oil-/333364969775?nav=SEARCH

sierrafery · Feb 15, 2020

If it was like in the advertising in the ebay link then better without it as on early modells, why introduce something unnecessary which can create problems? mine have never had one and i dont miss it at all... the starting problems are caused by the air bleed vave in most cases

Duck bill part of non-return (fuel)

tom1979

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