So there are no breather connections into the inlet side? I can't see how the oil could get into it in any other way (unless it's brake fluid, or auto transmission fluid)
Chris.
Heavy oil consumption
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No breathers connected at all. I had not considered brake fluid but it is definitely engine oil.
I have had a closer look in the plenum and there is a build up of engine oil on the engine side on the throttle butterfly valve (if thats what its called) and it is completely clean on the air filter side of the valve.
It almost looks like oil is being pushed up to that point and then presumably the oil is then being drawn down into all the other cylinders ?
So it may just be one piston at fault, but how can it be forcing oil up that far in the engine?
Thanks James
I have had a closer look in the plenum and there is a build up of engine oil on the engine side on the throttle butterfly valve (if thats what its called) and it is completely clean on the air filter side of the valve.
It almost looks like oil is being pushed up to that point and then presumably the oil is then being drawn down into all the other cylinders ?
So it may just be one piston at fault, but how can it be forcing oil up that far in the engine?
Thanks James
As the inlet manifold gasket is also the valley gasket with loads of oil splashing about in there it is very easy for oil to get into the inlet port and then up into the manifold and get drawn into other cylinders.
If the Valley gasket has been.
1. Reused
2. Badly installed
3. Damaged
4. Or the heads have been skimmed on the piss creating a wedge effect that would throw out the alignment of the inlet manifold and the heads leading to a lack of clamping pressure on the gasket. Maybe just one head maybe both.
Check valley gasket for signs of leaking into the manifold ports.
A blown head gasket could also create this problem if the head gasket is acting like a one way valve pressure seals the cylinder but under suction draws oil and crank vapour into the cylinder if the blow is near the inlet valve then there is a path to manifold - rare though
If the Valley gasket has been.
1. Reused
2. Badly installed
3. Damaged
4. Or the heads have been skimmed on the piss creating a wedge effect that would throw out the alignment of the inlet manifold and the heads leading to a lack of clamping pressure on the gasket. Maybe just one head maybe both.
Check valley gasket for signs of leaking into the manifold ports.
A blown head gasket could also create this problem if the head gasket is acting like a one way valve pressure seals the cylinder but under suction draws oil and crank vapour into the cylinder if the blow is near the inlet valve then there is a path to manifold - rare though
4.5L V8 Ginetta G27
