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why would u pull oil out of there instead of the head? you can have problems with the oil blowing past the seals if u pull it right from the oil pump...pressure might be too high...
The line doesn't take it directly from the pump. It's actually off the oil filter housing so the turbo gets the freshest and cleanest oil.
As far as your problem...if you're really concerned with blockage, do a complete oil system flush. It's best to take it somewhere if you want it to be thorough. If you want a DIY method, drain the oil and replace it with this mixture:
2 quarts oil
1 quart ATF
1 quart diesel fuel
Run your car around the block for about 10 mintues without hammering on it. Remember, you only have two quarts of oil in there. Depending on how bad your engine is fouled it may smoke like crazy or not. Use your own good judgement about where you drive around. Then just change the oil and plugs like normal.