Oil boiler trying to fire up and grinding noise

[Inverness]

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!

 

[ShaunCorbs]

I would say pump or fan but not an oily

 

[Inverness]

Motor and pump.

 

[SimonG]

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.

 

[Best]

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.

 

[Inverness]

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??

 

[Inverness]

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

 

[Inverness]

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

 

[Chalked]

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?

 

[Inverness]

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?