Engine - Screeching Noise During Warm Up

Boxster (987)

1/06 ENU 1726

Date Feb 27, 2006

Screeching Noise From The Engine During Warm-up

Vehicle Type:
Boxster (987)/Boxster S (987)

Model Year:
As of 2005 up to 2006

Concerns:
Engine

Situation:
Clearly perceptible noise (screeching) from the engine in the warm-up phase

A noise (screeching) can be heard from the engine at around 2,000 rpm during the engine warm-up phase.

In many cases, the noise is an indication that the engine or oil pump has been changed.

The noise is caused by the control piston in the oil pump.

Action Required:

Note
In the event of a complaint, a modified control piston must be installed in the oil pump cover.

Date of Introduction:
Engines manufactured since December 5, 2005 as of engine numbers:

M96.25 61 6 04763
M96.26 62 6 03668

Parts Info:
997.107.125.01 --> New/control piston
996.107.123.50 -->Seal

Work Procedure:

1 Remove cover for rear underbody --> Workshop Manual '5794 19 Removing and installing cover for rear underbody - section on "Removing"'





2 --> figure 1-Item 1 - shows the screw plug in the oil pump cover.

ATTENTION
Oil will run out (0.25 - 0.5 liters) when you remove the screw plug/control piston.

^ Risk of oil get on you and the workshop floor.

--> Place a suitable container underneath to catch the oil.

The contact surface in the oil pump cover can become damaged if an unsuitable tool is used for removing the control piston.

^ Damage to the contact surface can cause the control piston to stick.

^ This can reduce the oil pressure and damage the engine.

--> If the control piston does not come out of the oil pump cover by itself, pull it out carefully using a suitable extraction device.

3 Remove the control piston.





4 Lightly oil the new control piston and use a new sealing ring, Part No. 996.107.123.50 (--> figure 2-Item 2-).

5 Install the new control piston as shown in --> Figure 2

6 Tighten screw plug to Tightening torque 50 (37 ftlb.) Nm, contrary to instructions in the Technical Manual.

7 Install cover for rear underbody --> Workshop Manual '579479 Removing and installing cover for rear underbody - section on 'Installing"'

8 Check engine oil level display in the instrument cluster and top up the oil if necessary --> Workshop Manual '770701 Chocking engine oil level'





Working Time:

References:
Workshop Manual '519479 Removing and installing cover for rear underbody'
Workshop Manual '770707 Checking engine oil level'





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