Mechanical Fuel Pump

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20cent
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Joined: Fri Jun 19, 2020 10:36 pm
My E21(s): '80 316 1.8 manual

Mechanical Fuel Pump

Post by 20cent »

Hi everyone

I recently bought a 1980 E21 316 with the 1766 cc engine. It seems to be having a problem with the mechanical fuel pump, when it is driven by the engine it doesn't seem to be pumping anything but when I remove it and operate it manually it seems to work just fine. When turning over the engine without the fuel pump I can see the rod that is supposed to push the spring in the pump move a little. Does this mean the cam is worn and I have to replace the camshaft or is there another solution?


shadyracer01
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My E21(s): 323i '82 Y x2, 1 in resto, 1 now spares

Re: Mechanical Fuel Pump

Post by shadyracer01 »

If theres a separate pushrod between pump and camlobe then maybe a longer pushrod or modification can be effected. If also theres a thick mounting gasket for pump housing to cambox then perhaps this can be slimmed down a bit, wear on camshaft unlikely id say but not impossible.
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Jeroen
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Re: Mechanical Fuel Pump

Post by Jeroen »

Believe I've heard of these issues before and then a thinner (skimmed) gasket might indeed help getting enough movement of the pushrod, but I think I'd try a different fuel pump first.
Regards/groeten, Jeroen
20cent
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Posts: 2
Joined: Fri Jun 19, 2020 10:36 pm
My E21(s): '80 316 1.8 manual

Re: Mechanical Fuel Pump

Post by 20cent »

Thanks for the replies, I will try this.
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uwbuurman
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My E21(s): 1978 type 1 323i 5speed dogleg Polaris
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Re: Mechanical Fuel Pump

Post by uwbuurman »

Great! And if you could find the time to introduce the car to us, it would be great. Lots of pics please :mrgreen:
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1978 BMW 323i
1980 BMW 528i maior restitutio
1987 BMW 325iA cabriolet
2006 BMW 320d touring High Executive
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