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M62 8 Cylinder Power Steering Pump Replacement
 
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Pelican Technical Article:

M62 8 Cylinder Power Steering Pump Replacement

Nick Czerula

Time:

3 hours3 hrs

Tab:

$250

Talent:

****

Tools:

Set of sockets (13mm 17mm), wrenches (17mm), T40 Torx, screwdrivers

Applicable Models:

BMW X5 Sport Utility (2000-06)

Parts Required:

Power steering pump, power steering fluid, power steering hose clamp, serpentine belts, high pressure line O-ring

Hot Tip:

Work with a cool engine

Performance Gain:

Quite power steering pump, remedy power steering leaks

Complementary Modification:

Change power steering fluid reservoir

When a power steering pump begins to fail, it will emit a groan when steering from side to side, or you will notice increased steering effort. Of course, the pump could leak also, but a noisy weak pump is most common. Inside the power steering fluid reservoir there is a small filter that can become restricted. The filter is not serviceable separately. If you believe it to be the problem, replace the power steering fluid reservoir. See our tech article on power steering fluid reservoir replacing. If you loose function of your power steering or it takes a greatly increased effort to steer your vehicle, remove the drive belt and inspect the power steering pump shaft. If you can slide the pulley out of the power steering pump, the shaft is broken. You will have to replace the power steering pump.

In this article, I'll go over the steps involved with replacing and bleeding the power steering pump on M62 8-cylinder models.

Raise and support the front of your vehicle safely. See our tech article on jacking up your car. Be sure to wear your safety glasses whenever you work under your car.

Remove the lower splash shields. Remove the drive belts. See our tech articles on these subjects should you need help.

Place an oil drain pan under the left side of the engine.

The power steering pump (green arrow) is located on the left lower side of the engine.
Figure 1

The power steering pump (green arrow) is located on the left lower side of the engine. This view is from above with the drive belt removed. The pump is removed from below.

First we have to remove the intake air duct that runs from the throttle housing (yellow arrow) to the mass air flow sensor (green arrow).
Figure 2

First we have to remove the intake air duct that runs from the throttle housing (yellow arrow) to the mass air flow sensor (green arrow).

Working at the fresh air intake, remove the four plastic rivets (green arrows).
Figure 3

Working at the fresh air intake, remove the four plastic rivets (green arrows). Use a pair of pliers (inset) to remove the center rivet. Once all center rivets have been removed, pull the duct up to detach it from the vehicle.

Then lift the duct up on the left side while detaching it from the duct (green arrow) on the right side.
Figure 4

Then lift the duct up on the left side while detaching it from the duct (green arrow) on the right side.

Working at the mass air flow sensor, loosen the hose clamp using a flathead screwdriver (green arrow).
Figure 5

Working at the mass air flow sensor, loosen the hose clamp using a flathead screwdriver (green arrow).

Working at the throttle housing duct, loosen the hose clamp using a flathead screwdriver (green arrow).
Figure 6

Working at the throttle housing duct, loosen the hose clamp using a flathead screwdriver (green arrow).

Next, you will have to rotate the throttle housing duct up toward the left side of the vehicle in the direction of the green arrow.
Figure 7

Next, you will have to rotate the throttle housing duct up toward the left side of the vehicle in the direction of the green arrow. This will detach it from the mass air flow sensor. Once detached from the mass air flow sensor, pull the duct off the throttle housing. There are two small hoses you have to disconnect in the following step. Be careful not to damage them during this step.

Working at the bottom of the intake air duct, detach the plastic line by squeezing the release collar (green arrows) while pulling the line off the duct.
Figure 8

Working at the bottom of the intake air duct, detach the plastic line by squeezing the release collar (green arrows) while pulling the line off the duct. Then pull the vacuum hose (yellow arrow) straight off the duct to remove it.

When removing the duct, be sure not to misplace the rubber duct seal (green arrow).
Figure 9

When removing the duct, be sure not to misplace the rubber duct seal (green arrow). The seal will either stay inside the duct or remain attached to the throttle housing.

Working from below, on the left side of the engine, remove the pressure line using a 17mm crows-foot wrench (blue arrow).
Figure 10

Working from below, on the left side of the engine, remove the pressure line using a 17mm crows-foot wrench (blue arrow). Do not remove it yet. Leaving it installed until the last minute will prevent dirt from entering the pump. Next, the rear mounting fastener has to be removed. The pump uses an adjuster secured by a nut. The yellow arrow points to the adjustment wheel. The green arrow points to the adjuster lock nut. The red arrow points to the stud end that the nut is removed from. Use an open end wrench and remove the nut from the stud.

Now, you can remove the two 5mm Allen power steering mounting fasteners (green arrows).
Figure 11

Now, you can remove the two 5mm Allen power steering mounting fasteners (green arrows). Once removed, unscrew the pressure line and allow the remaining fluid to drain into a suitable container. The high pressure steering line is sealed with an O-ring. Be careful not to lose the O-ring when removing the line. It can get stuck in the pump and fall out when the pump is removed. Once the line is removed, inspect the O-ring and replace if necessary (O-ring available separately from Pelican Parts).

Next, pull the hose down enough to access the inlet hose.
Figure 12

Next, pull the hose down enough to access the inlet hose. Cut the hose clamp for the inlet hose to the power steering pump (green arrow). Then, remove the hose from the pump. Have a drain pan under the pump, excess fluid will leak out.

Rotate the pump so the pulley is facing up.
Figure 13

Rotate the pump so the pulley is facing up. Then remove it through the subframe area. With the pump removed, remove the pulley and mounting bracket's T40 Torx fasteners. Then transfer over the front and rear mounting bracket and pulley over to the new pump, if necessary. Install the hoses to the new pump. Do not tighten yet. Then install and tighten the front fasteners. Then rotate the plastic adjustment wheel until snug. Then install and tighten the rear mounting nut. Tighten the hose clamp on the inlet hose. Then tighten the pressure hose. Reassemble the remaining items in the reverse order of removal. Once complete, fill and bleed the power steering pump. Before starting the engine, fill the power steering reservoir with clean fluid to the MAX level on the dipstick. Start the engine and turn the steering wheel fully left and right three times. Turn the engine off. Check the fluid level. Add power steering fluid until it reaches MAX on dipstick. When full, the fluid should be clear and foam free. Foam or bubbles is a sign of air in the system.

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Page last updated: Wed 12/7/2016 02:24:38 AM