Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1479

17. Remove primary timing chain (7) (Refer to 9 - ENGINE/VALVE TIMING/TIMING CHAIN AND SPROCKETS -

REMOVAL).

18. Remove upper primary timing chain guides (10).

19. Remove camshaft bearing caps gradually in the

sequence shown.

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ENGINE - 2.7L DOHC - SERVICE INFORMATION

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20. Remove camshafts (3) & (10) and valvetrain components from cylinder head. Note component locations for

re-installation in original locations.

21. For left cylinder head removal:

•

Remove fastener securing engine oil dipstick tube to cylinder head. Remove engine oil dipstick tube.

•

Remove generator.

22. For right cylinder head removal:

•

Remove cylinder head ground strap.

•

Disconnect EGR valve electrical connector and remove EGR valve from head (Refer to 25 - EMISSIONS
CONTROL/EXHAUST GAS RECIRCULATION/VALVE - REMOVAL).

CAUTION: Ensure cylinder head bolts 1 - 3 are
removed before attempting the removal of cylinder
head, as damage to cylinder head and/or block
may occur.

23. Remove cylinder left head bolts (2) and right head

bolts (1) in sequence shown.

24. Remove cylinder head(s).

25. Remove and discard cylinder head gasket.

26. Clean cylinder head and block sealing surfaces

(Refer

to

9

-

ENGINE/CYLINDER

HEAD

-

CLEANING).

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ENGINE - 2.7L DOHC - SERVICE INFORMATION

9 - 1941

CLEANING

To ensure engine gasket sealing, proper surface preparation must be performed, especially with the use of alumi-
num engine components and multi-layer steel cylinder head gaskets.

NOTE: Multi-Layer Steel (MLS) head gaskets require a scratch free sealing surface.

Remove all gasket material from cylinder head and block (Refer to 9 - ENGINE - STANDARD PROCEDURE). Be
careful not to gouge or scratch the aluminum head sealing surface.

Clean all engine oil passages.

INSPECTION

1. Before cleaning, check for leaks, damage and

cracks.

2. Clean cylinder head and oil passages.

3. Check cylinder head for flatness .

4. Cylinder head must be flat within:

•

Standard dimension = less than 0.05 mm (0.002
inch.)

•

Service Limit = 0.2 mm (0.008 inch.)

•

Grinding Limit = Maximum of 0.2 mm (0.008
inch.) is permitted.

CAUTION: 0.20 mm (0.008 in.) MAX is a combined
total dimension of the stock removal limit from
cylinder

head

and

block

top

surface

(Deck)

together.

INSTALLATION

NOTE: The cylinder head bolts are tightened using
a torque plus angle procedure. The bolts must be
examined

BEFORE

reuse.

If

the

threads

are

necked down the bolts must be replaced

Necking can be checked by holding a straight edge
against the threads (3). If all the threads do not con-
tact the scale (2), the bolt must be replaced.

CAUTION: When cleaning cylinder head and cylin-
der block surfaces, DO NOT use a metal scraper
because the surfaces could be cut or ground. Use
ONLY a wooden or plastic scraper.

1. Clean sealing surfaces of cylinder head and block

(Refer to 9 - ENGINE - STANDARD PROCE-
DURE).

2. Install new head gasket over locating dowels.

3. Install cylinder head to block, assuring head is

properly positioned over locating dowels.

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4. Lubricate bolt threads with clean engine oil and

install bolts.

5. Tighten bolts in sequence shown for left head (2)

and right head (1), using the following steps and
torque values:

•

Step 1: Bolts 1–8 to 48 N·m (35 ft. lbs.)

•

Step 2: Bolts 1–8 to 75 N·m (55 ft. lbs.)

•

Step 3: Bolts 1–8 to 75 N·m (55 ft. lbs.)

•

Step 4: Bolts 1–8 to +90° Turn Do not use a
torque wrench for this step.

•

Step 5: Bolts 9–11 to 28 N·m (250 in. lbs.)

6. For left cylinder head installation:

•

Install engine oil dipstick tube.

•

Install generator.

7. For right cylinder head Installation:

•

Install cylinder head ground strap.

•

Install EGR valve (if equipped) (Refer to 25 - EMISSIONS CONTROL/EXHAUST GAS RECIRCULATION/
VALVE - INSTALLATION).

8. Install all valvetrain components and camshafts

(Refer to 9 - ENGINE/CYLINDER HEAD/CAM-
SHAFT(S) - INSTALLATION). Tighten camshaft
bearing caps in sequence shown to 12 N·m (105
in. lbs.).

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ENGINE - 2.7L DOHC - SERVICE INFORMATION

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