Question about Audi A4
Burning oil smell from under bonnet of 2005 a4 1.8t
Posted by Anonymous on
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Posted on Jan 02, 2017
if the smell only comes on when the heater is on try pulling the blower motor mice like to build nests in the blower motor housing.
Posted on Mar 23, 2009
A burning rubber smell under the hood might be just that - consider having your accessory drive belt inspected, as it is possible that a bearing in one of the accessories (alternator, power steering pump, air conditioning compressor, etc.) or in the tensioner mechanism might be failing. This sort of fault will often cause that particular accessory bearing to spin less freely than the others, and as a result the belt continues to pass over the associated pulley at the same speed as the engine. Essentially, the result is similar to a car spinning its tires on dry pavement - and a similar 'burning rubber' odor is the friction and heat of the rubberized belt.
If the odor is more like burning oil than burning rubber, the rear valve cover gasket is situated in a place that results in dripping oil, even small and unnoticable amounts, onto the exhaust manifold that is directly underneath the valve cover.
These two items might be places to start your inquiry. Best of luck to you!
Posted on Apr 27, 2009
Most likely cause is a leak in the valve cover gasket. Under pressue, a good sized leak will spurt and burn off on the manifuld, causing the smell of burning oil you're getting. This also would cause the presence of oil throughout the engine compartment. Best of luck on your problem.
Posted on Jun 19, 2009
It really depends on where the oil is leaking from. Most of the time, engine vibration and constant bumpy rides could loosen bolts and nuts here and there causing parts to brush against each other. In areas like the Gearbox and the engine itself, there is a thin material known as a Gasket that seats in between some these parts to prevent lubricants [i.e.oil] from leaking. If this gasket wears out, you have an oil leak. However friction is rarely the cause of oil leaks. When a gasket serves its time [after years of heating and cooling, contaction and expansion] it simply needs changing. So you could check to see if really you have worn out gaskets or loose joints.
As for the smell of burning oil, that is probably due to worn out engine rings. Around every Piston are a series of rings that prevent lubricating oil from going into the combustion chambers. when they are worn out, some oil becomes part of the combustion process reducing your cars overall power and causing smoke.
As for Cost, you wont spend much to have the oil leaks checked, as for the rings, you'll probably spend a little bit more. Where I live all that never goes past $170
Posted on Jun 19, 2009
Normal oil consumption for a car is about 1 quart per 3,000miles. If you can calculate how much of a quart low you are per oil change you will be able to tell whether your oil consumption is excessive or not.
Posted on Aug 07, 2009
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