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Discuss Oil boiler trying to fire up and grinding noise in the Oil and Solid Fuel Forum area at UKPlumbersForums.co.uk.

  1. Inverness

    Inverness Plumber GSR

    hi guys went to replace a leaky oil flexi hose today which it beers leaking for some time.. So when I fired the boiler on it was if it was struggling to fire up and there was a grinding noise too. Would this be a new oil pump? I'll be doing my oftec at the end of this month. Cheers to all you oil wizards!
     
  2. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    I would say pump or fan but not an oily
     
  3. Inverness

    Inverness Plumber GSR

    Motor and pump.
     
  4. SimonG

    SimonG Trusted Plumber Top Contributor!!

    Depends on the actual noise. Could be fan interference with the casing. Could be bearings. Could be fuel pump.

    Basically if it's moving then it can grind.

    Best to rule out the obvious first. I.e. fan against casing, and then go from there.
     
  5. Best

    Best Trusted Plumber Top Contributor!!

    Normally with experience you can tell just by the type of sound whether it is a motor bearing or a worn oil pump. (Fan will also make a grinding noise if fitted in wrong position too tight to something, or if imbalanced, by a dead mouse for example)
    Bearings are by far the most common noise fault. The bearing close to oil pump (on typical direct connection double ended motor burners) is usually the first to be faulty, like Riellos etc.
    Oil pump if noisy might show flickering on oil gauge, proving it is worn.
    If in doubt, just remove oil pump and test run the burner for a few seconds and see if noise still there.
     
  6. Inverness

    Inverness Plumber GSR

    Thanks. When I connected the oil gauge it was flickering. When the boiler is turned on the initial start up before it fully kicks in. It’s doing this all the time so I couldn’t take a reading co2. But you can hear a grinding noise. What would you replace first??
     
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  7. Inverness

    Inverness Plumber GSR

    It is a camray 5 oil boiler. With a riello burner.
     
  8. Inverness

    Inverness Plumber GSR

    Would I need a fan puller? How would I see if it’s the fan from the casing ?
     
  9. Chalked

    Chalked Plumber GSR

    Flickering pressure gauge and grinding noise, would generally show a failing pump.
    But could also be air in the line, blocked fuel line, or blocked filter. Or lack of fuel.
    Do you have a vacuum gauge?
     
  10. Inverness

    Inverness Plumber GSR

    Yes I do have a vaccum guage. But I've never used it before. Can you explain further on how to set it up and what would I be looking for?
     
  11. Inverness

    Inverness Plumber GSR

    I did bleed the oil with my oil guage device.
     
  12. Inverness

    Inverness Plumber GSR

    Maybe replace the oil pump first?
     
  13. Inverness

    Inverness Plumber GSR

    The boiler does not go to lock out it just keeps on working trying to fire up the initial start up and continues doing this...
     
  14. Best

    Best Trusted Plumber Top Contributor!!

    Riello oil pumps can have their drive pin and first gear broken/worn and will slip and suddenly stop pumping oil. That is easy to check by opening the oil pump outer cover and then removing the inner gear cover (keeping gears pointing upwards or they will fall out rendering pump useless) and see if drive is broke.
    You will need bearing pullers, small socket set (think 5.5mm socket for Riello motor bolts to get at bearings)
    Fan puller advisable, but is possible to remove fans by turning them rather than pulling them, while stopping other end of motor turning.
     
  15. Best

    Best Trusted Plumber Top Contributor!!

    If your Riello pump looks like this, then it is knackered.
    image.jpeg
     
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