PCV valve leak

  • 2.5L
  • 5 CYL
  • 2WD
  • 67,500 MILES
Hello. I am driving the car listed above SE. I have the following check engine light P2279 Intake Manifold Leak. I believe the cause of this CEL to be a faulty PCV valve.

The symptoms are rough idling, a high pitched whining sound from the engine, and suction coming from the oil cap.

The engine valve cover has the PCV valve built in. When I remove the vent hose from the valve cover and plug it with my finger, the idle of my vehicle immediately evens out. It sounds and runs as it would prior to experiencing it's present issue.

I intend to replace the valve cover assembly, but in the interim, can I cap off the PCV vent hose to safely drive my vehicle?
Do you
have the same problem?
Monday, August 5th, 2019 AT 1:08 PM

2 Replies

No you cannot cap off anything it will cause the engine to build pressure and blow the seal out. Here are the instructions in the diagrams below on how to fix the problem:

3 - Valve Cover - 07K103469L $286.67

1. Bolt 10 Nm

2. Cylinder Head Cover
With the pressure regulator valve for the crankshaft housing ventilation.
Tightening sequence, refer to => [ Tightening Sequence for the Cylinder Head Cover Bolts ].
Removing and installing, refer to => [ Cylinder Head Cover ].

3. Cylinder Head Cover Gasket
Replace if damaged or leaking.

4. Crankcase Ventilation Hose
To the intake manifold.

5. Oil Filler Cap
6. Gasket
Replace if damaged or leaking.

7. Bolt 10 Nm
8. Wire Bracket
9. Seal
Removing and installing, refer to => [ Chain Compartment Cover Seal ] See: Timing Cover Gasket > Removal and Replacement > Chain Compartment Cover Seal.

10. Wire Bracket
11. Chain Compartment Cover
Removing and installing, refer to => [ Chain Compartment Cover ] See: Timing Cover > Removal and Replacement > Chain Compartment Cover.
12. Bolt 2 Nm
13. Camshaft Adjustment Valve 1 (N205)
Check using the vehicle diagnosis, testing and information system VAS 5051.

Replace if damaged.
For the camshaft position sensor item 16 => [ (Item 16) ] no replacement part.

15. Bolt 10 Nm
16. Camshaft Position Sensor (G40)
17. Transport Strap
18. Bolt 25 Nm
19. Cylinder Head Gasket
Always replace.
After replacing, replace the entire amount of coolant.

20. Cylinder Head
Removing and installing, refer to => [ Cylinder Head ].
Checking the cylinder head for warpage, refer to => [ Checking the Cylinder Head for Distortion ].
It is not permitted to rework the sealing surface.
With the coolant pipe connection pressed in.
- If necessary, remove coolant deposits using a copper wire brush or fine sandpaper (minimum 100 grit).
- If the pipe connection is worn, replace it using liquid locking fluid (D 000 600 A2).

21. Cap
On engines without a Secondary Air Injection (AIR) system only.
Engines with a AIR system, refer to => [ Secondary Air Injection System Overview ].

22. Gasket
Always replace.

23. Bolt 40 Nm +180 (1/2) additional turn.
Always replace.
Follow the loosening/tightening sequence. Refer to => [ Cylinder Head ].

24. Wire Bracket
For the heated oxygen sensor (G39).

Check out the diagrams (Below). Please let us know what happens.
Was this
Tuesday, August 6th, 2019 AT 2:37 PM

This seems like you confirmed what you issue is which is good however, I would not delay to long in getting it repaired. Basically the PCV system either vents the combustion chamber gases in the engine to the atmosphere or on newer vehicles, it routes them back into the engine to be reused.

If these are not being vented then they are staying inside the vehicle. This will cause higher pressure on the inside of the engine and those gases are staying inside.

Basically, if you go too long, then the pressure will cause an oil leak as it will blow out the seals. I would not recommend it.

I would just make sure you fix them ASAP and drive as little as possible.
Was this
Tuesday, August 6th, 2019 AT 2:46 PM

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