Overfilled oil on 147 JTDm - Alfa Romeo Forum
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Overfilled oil on 147 JTDm

Not long had the Alfa; topping up the oil, and not used to how slowly diesel oil is to drain down, I've overfilled (oil is just up to the bendy bit on the dipstick). Do I need to get the excess taken out?

When I got it, I had the car serviced by an Alfa specialist, and the oil level on the dash said maximum, so I assumed that was correct. Today, one bar was not illuminated, so I decided to top up the oil. 250 mls went in, waited 5 minutes, no change in the indicator, nor on the dipstick, a bit more and a bit more (1 liter total added). Still no change. Went back, 45 minutes later, and it now says maximum, and plenty of oil on the dipstick.

Now I read that the oil should not be at maximum. On a petrol car, I wouldn't worry too much, but on a diesel, apparently the excess oil can be drawn in, and the engine just run off the oil, until it runs out of oil.....

Should I worry?
saz9961 is offline  
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hello saz

i'd drain some oil out until it is correct on the dipstick if i were you.

not bad too do if you can get her on normal drive on ramps or axle stands up front, and if i recall you'll need an 8mm hex key or bit for the sump bung, or at least thats what my 2.4 jtd requires.

the fear you have of the extra oil being drawn in, is real but rare in the alfa's, and normally requires some oil seals to be tired, or the oil to be ridiculously high, sufficient to over pressurize and force its way past seals.

renault dci's can be quite prone according to a renault technician friend of mine, and apparently many a young mechanic has been spotted sprinting across the dealership yard yelling, "she's gonna blow Captain!"

i think its turbo compressor seals that fail, allowing the cooling oil to enter compressor housing under pressure and assist in driving the compressor wheel, resulting in increase rev's which creates even more pressure until the turbo is literally sucking the oil out of the engine and using it as fuel through the turbo unit, at an ever increasing rate or rev's! and you can't turn it off!!!!

eventually, unless the car is stalled, it will rev's its nuts off until no oil remains and blow the bottom end out of the thing!!!!!!


but a little high on the stick wouldn't give you this issuen i think, biut better to be safe than sorry eh!

it can however force its way through to your clutch i believe, maybe someone else could confirm?????

cheers saz,

get draining


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147 , jtdm , oil , overfilled

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