Still can't understand the logic of some DIYers that REFUSE to buy a torque wrench.

That plastic cap will probably cost more to replace than a cheap Harbor Freight 3/8 torque wrench and a 3/8 to 1/2 socket adapter (to fit the 1/2 drive 36mm socket).

DIY 101...... step 1, get torque wrenches, step 2, get a Bentley manual or online access to torque specs.

DIYing without tq wrenches is a fools folly.

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'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!