FRONT END ROTATING KNOCKING NOISE WHEN TURNING TO THE LEFT.

make sure that the squeak is not from dry rings in the bore
put oil down the cylinder and rotate the crank
if it goes it could be just dry and need no further checks but if it is in a bearing then it is serious and needs replacing
turning a crank should produce a dry scraping noise as the pistons move up and down the bores but certainly not other noise

Usually comes from a front or rear wheel bearing.

bad motor or transmission mount.

Ensure the wheel nuts and Axle nuts are properly torqued to the specification. Lift up the front wheels, place supports under the car and do the following:
- Sit if front of right wheel, slightly move it right and left and feel any abnormal noise if coming out of it. If click-click or Tuck-Tuck sound is observed it could be due to the excessive play in the tie rod end, rack end, ball joint wheel bearing or U joint. Next hold the Tire with your one hand at the top and with other hand at the bottom. Shake the Tire inside out and feel any noise or play. If play is observed, it could be the worn out ball joint or the wheel bearing. Now hit the Tire at the top with rubber hammer and observe any rattling noise coming from near the center of the wheel. If you could listen to the extra noise it could be due to the dried up caliper pins. Grease the pins with graphite grease. If all is found fine, similarly check the left wheel and repair as necessary.

Could be you have one of the C/V or "constant velocity" joints going bad. Would be easier on a car lift to check however look at the rubber boots, one on each end of both front drive shafts behind each front wheel, to see if damaged, torn etc. If a boot is torn and lost it's grease for sometime then the joint will give a knocking noise on turns and will need replaced.

Sounds a lot like a pitted wheel bearing. Try jacking up the front of the truck and rotating the wheels by hand while listening closely. Some noise is normal but anything rhythmic points to a bad wheel bearing.

Check the front wheel bearing, it is probably worn. Could be a ball joint. Grab the front wheel and pull back and forth, if it moves in and out...something is worn.

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The knocking noise on your van is front sway bar bushings

it could be tht the exhaust pipe is loose and therefor makes shaking and kinda banging noise. hope i helped! ;-)

This is the problem with suspensions problem of the car or major problem with the engine in the car get it check by the dealer as this may factory defective part install as this car is still under warranty.........................................................