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S40 / V40 '96-'04 General Forum for the Volvo S40 and V40 (Classic) Series from 1995-2004. |
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fuel smell in oilViews : 805 Replies : 9Users Viewing This Thread : |
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Apr 11th, 2024, 16:07 | #1 |
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fuel smell in oil
hi, wondering if anyone can help?
its a 2003 S40 1.8 sport my car went into the garage today for a new timing belt & pulley, new thermostat, and oil/filter change... I'm having the work done with a Volvo Specialist and got a call from them stating they could smell petrol in the oil, they checked the injectors and said they was dry and no leaks there, at this point they are unaware of what is causing the smell? also a few months back i got a full service done at another garage and apparently it was over-filled by an inch i do very few miles in my car, and only use it a couple of days a week so it just sits there most of the time and when i do use it i'm only doing short/local trips. i have no problems starting it, no loss of power, no idle issues or things like that if any of the above is any help? does anybody have any idea? help would be appreciated, its a little worrying. the garage has suggested not to carry out the new timing belt/pulley repair until they can figure out what the smell is, instead suggesting to just have fresh oil/filter and give it a couple of months of driving to see if the smell comes back? Last edited by jackson74; Apr 11th, 2024 at 16:15. |
Apr 11th, 2024, 16:59 | #2 |
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short journeys are not good for any car when the car is started the fuel mixture is increased same as pulling the choke on an older car it possible that this is your problem how short are your journeys? it might be doing this if your journeys are less then 4 miles .it might be worth having the injectors checked to see if they are working correctly.
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Apr 11th, 2024, 18:09 | #3 | |
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just a little worrying that a Volvo Specialist can't pinpoint the issue, hence the post in the hope someone has had a similar issue Last edited by jackson74; Apr 11th, 2024 at 18:21. |
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Apr 11th, 2024, 19:16 | #4 |
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which volvo specialist did you use ? its unusual for a good volvo garage to fail on finding faults.
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Apr 11th, 2024, 20:34 | #5 |
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All engines have slight blow-by, gasses that escape past the piston rings and flow into the crankcase where they mix with the oil. When you start your engine cold, the computer commands a rich mixture and some of that fuel doesn't burn and ends up in the crankcase.
If you drive short trips and never get the engine hot enough to evaporate that fuel, you end up with a petrol smell in your oil. Although, petrol in the oil isn’t good. Your engine needs lubrication that only the oil can give. Needs a service (oil change) and a good drive. That’s the cheapest option at first. If it still smells like petrol after new oil and a decent spin, something else is wrong. Likely injectors, which can’t be tested by simply looking at them.
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Apr 12th, 2024, 00:31 | #6 | |
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no regular short journeys are good for a any vehicle. You really need to go and blow the cobwebs out it will cost you in the long run otherwise. |
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Apr 12th, 2024, 12:12 | #7 |
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fuel in oil
If oil level was to high befor, it is also possible they did not overfill but fuel came in the oil and the level got higher. So oil + fuel gave an inch overfill and not only the oil. If so have it checked again after the service now.If level go up again there i a big problem that need to get fixed soon.
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Apr 12th, 2024, 13:30 | #8 |
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just got a call from the garage.. it was a the broken thermostat, tricking the engine thinking it was running cold all the time and using extra fuel hence the smell in the oil, so all is well again and no major engine problem phew!
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Apr 12th, 2024, 14:46 | #9 | |
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Are you having the timing belt replaced?
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Apr 12th, 2024, 16:07 | #10 | |
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yeah initially that's why i took my car in to get a new timing belt and pulley as it was due a new belt, plus it was making an constant/intermittent noise which is common on my model and its because of the pulley which causes that noise. I will add that within seconds of me pulling up into the car park the mechanic came out and without me asking he told me what was wrong with it lol Last edited by jackson74; Apr 12th, 2024 at 16:17. |
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