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Re: Oil related questions
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14 July 2017 12:07PM
The bypass valve opens to prevent oil starvation of the engine. As you say the filter may be clogged. Or when the oil is still cold not enough may pass through.

If you Google on the bypass valve, you find plenty. Try to read more than one article. When you have read them all, still keep an open mind.

If we neglect the internal leakage of the oil pump, the Fulvia oil pump is a pump that pumps a fixed volume per revolution. The oil pressure is the "back pressure" as determined at the receiving end. The sum of all the clearances at the bearings etc and the viscosity of the oil determine oil pressure. Theoretically the pressure could go up to infinity if nothing breaks and the engine has unlimited power.

However, there is another by pass valve just before the oil filter where the oil arrives from the pump. That valves opens at 6 bar and bleeds excessive oil back to the sump.

Huib



Lancia Fulvia specialist.
Netherlands - Niederlande
SubjectAuthorViewsPosted

Oil related questions

ThomasW32311 July 2017 09:09PM

Re: Oil related questions

ThomasW29712 July 2017 06:01PM

Re: Oil related questions

Huib27813 July 2017 10:11AM

Re: Oil related questions

ThomasW26813 July 2017 06:19PM

Re: Oil related questions

Huib27414 July 2017 12:07PM

Re: Oil related questions

ThomasW26914 July 2017 07:35PM

Re: Oil related questions

Huib26017 July 2017 02:37PM



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Omicron Lancia Spares and Restorations
pre-Beta spares
and restorations
CASA FULVIA
Fulvia service
and restauration
Emporio Ricambi, specialist for Lancia spares
Lancia spares
Lancia Vintage Spares
Rosso Corsa Italia, Lancia Fulvia spares
Lancia, 70 Years of Trailblazing