A possibility that has not been mentioned yet.... Intake manifold gasket. This engine was descended from the older 2.9 Ranger engine. Those engines had a tendency to "suck in" the intake manifold gaskets into the valley under the manifold. At first, there were few if any symptoms, oil consumption would then increase, and finally they would start running poorly. IF you did not follow procedure TO THE LETTER when you installed the manifold after you replaced the heads, there is a possibility of a problem there. Bear in mind that this engine uses cast iron heads and aluminum intake manifold and plenum. Torque, sequence, and procedure are important. Valve seals are another possibility, but I would say that rings are highly unlikely from my experience with this engine.
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Today's Featured Article - A Lifetime of David Brown - by Samuel Kennedy. I was born in 1950 and reared on my family�s 100 acre farm. It was a fairly typical Northern Ireland farm where the main enterprise was dairying but some pigs, poultry and sheep were also kept. Potatoes were grown for sale and oats were grown to be used for cattle and horse feeding. Up to about 1958 the dairy cows were fed hay with some turnips and after that grass silage was the main winter feed. That same year was the last in which flax was grown on the farm. Flax provided the fibre which w
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