Screeching Noise From The Engine During Warm-up – 2005-2006 Porsche Boxster & Boxster S

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Technical Information

Boxster (987)
1/06 ENU 1726

1

 

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 604763

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 ‘579479 Removing and installing cover for rear underbody- section on “Removing'”
  2. ⇒Figure 1 –Item 1– shows the screw plug in the oil pump cover.

screw plug in the oil pump coverFigure 1

 

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.

 

WARNING

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 ofthe oil pump cover by itself, pull it out carefully using a suitable extraction device.

  1. Remove the control piston.
  2. Lightly oil the new control piston and use a new sealing ring, Part No. 996.107.123.50 (⇒Figure 2 –Item 2-)
  3. Install the new control piston as shown in ⇒Figure 2.
  4. Tighten screw plug to Tightening torque 50 (37 ftlb.) Nm, contrary to instructions in the Technical Manual.
  5. Install cover for rear underbody ⇒Workshop Manual 519419 Removing and installing cover for rear underbody – section on Installing”
  6. Check engine oil level display in the instrument cluster and top up the oil if necessary ⇒Workshop Manual ‘170101 Checking engine 0il level’

screw plug in the oil pump coverFigure 2

 

Working Time: 1 7 26 19 00: Removing and installing pressure-regulating valve Labor time: 60 TU
References: ⇒Workshop Manual ‘519419 Removing and installing cover for rear underbody’

⇒Workshop Manual ‘170101 Checking engine oil level’

 

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