Mechanics

EXCESS OIL CONSUMPTION

2002 Nissan Altima • 68,000 miles

Car uses alot of oil. And smells from engine when warms up constantly. But, car, has no signs of, any leak at all.
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Chrislarsen
October 14, 2012.



Gotta be leaking if you can smell it under the hood. There's two ways to find an elusive leak. One is by adding a small bottle of dark purple dye, driving a little, then searching with a black light. The dye will show up as a bright yellow stain that you can follow back to the source. That is usually used when there's an obvious leak but you can't find from where.

When there's little pooled oil or drips, you can use a smoke machine to inject a white, non-toxic smoke into the dipstick tube, then you look for where that smoke sneaks out. That will work when the leak is in a non-pressurized part of the engine such as the oil pan, cylinder head cover, and the return passages. It might not work if the leak is in a pressurized passage.

Caradiodoc
Oct 14, 2012.
No leaks means oil is being burnt in cylinders mostly due to worn valve seals.

KHLow2008
Oct 14, 2012.
Thx alot looked all around possible places on engine where there could be a leak and nothing

Tiny
Chrislarsen
Oct 14, 2012.
How can I be smelling it curbing whenever hot bout no smoke and no leak. There is smoke from tailpipes but not engine at all.

Tiny
Chrislarsen
Oct 14, 2012.
If the engine is burning oil, the dye will show up inside the tail pipe, but that doesn't explain why you're smelling it.

Caradiodoc
Oct 14, 2012.
That's what I'm trying to determine, why its going thru so much oil but not leaking and smelling very bad inside car if any windows are down at all. Going thru about a quart of oil pier fill of fuel.

Tiny
Chrislarsen
Oct 14, 2012.
Smoking from exhaust is usualy an indication of oil being burnt in cylinders if the smoke is grey.

KHLow2008
Oct 14, 2012.
Smoke is black initially than blue. So far looked 4 of 6 spark plugs and saw small on one amount of oil on one but that's it no leakage around valve covers or oil pan or any other spot where leak is possible. Very mind boggling and has no profane issues at all been this way froe over a year.

Tiny
Chrislarsen
Oct 14, 2012.
What is so mind boggling about this? The valve seals are bad allowing oil to get into the cylinders to be burnt.

KHLow2008
Oct 14, 2012.
Just that low miles on motor and that smell whenever engine in warm to where you can't drive work windows down. That's mind boggling without a leak.

Tiny
Chrislarsen
Oct 14, 2012.
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