oil AUDI A4 1995 B5 / 1.G AFC Engine Lock Carrier Removing For Service Workshop Manual

15-9

Cylinder head cover, installing


CAUTION!

Part numbers are listed for reference only.
Always check with your Parts department for
the latest information.
The inside and outside surfaces of the
cylinder head cover gasket must be lightly
coated with silicone lubricant D 007 000 04
before installation.

Installing cylinder head sealing cap
Cylinder heads available from the Parts department can be used on either
the left and right hand sides and are provided with a sealing cap for use
where appropriate. - Carefully coat four edges on cylinder head sealing surfaces with
Silimate, Part No. AMV 174 004 01, using a small screwdriver.
Silimate must be kept out of oil opening -A-.
- Coat edge of sealing cap with sealing paste AMV 188 000 02.

- Tap sealing cap in using drift VW 295, far enough so that outer edge of
sealing cap is flush with chamfer on cylinder head.
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15-10

Camshaft oil seals, replacing


Front

- Remove toothed belt page 13-11
.

- Remove cylinder head cover.

- Remove rear toothed-belt guard.

Note:
Do not oil sealing lip or outer edge of seal before pressing in.
Left front - Remove seal with seal extractor 3240.
- Clean bearing and sealing surfaces.

Right front - Press seal in as far as possible using seal installer 3241.
- Use pulling sleeve on camshaft.
- Press seal in flush using 3241.
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15-12


Note:
Do not oil sealing lip or outer edge of seal before pressing in.
Tightening torque:
CMP sensor plate: 20 Nm (15 ft lb) - Use seal extractor 3240 or 2085 and bolt 2085/1 to remove seal.
- Clean bearing and sealing surfaces.
- Use guide sleeve and insertion tool 3241 to press seal in until fully
seated.
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- Disconnect harness connector at oil pressure sensor and at oil
pressure switch.
- Disconnect harness connector at the Camshaft Position (CMP) sensor
housing.
- Disconnect vacuum pipe at intake manifold changeover valve (blue)
and also at EGR valve (brown).
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15-18

Compression pressure, checking


Engine warm-oil temperature at least 30 C
(86 F)

Throttle valve fully open during cranking

- Disconnect harness connectors from ignition coil
power output stage and from all six fuel
injectors.

- Use compression pressure recorder VAG 1381
together with adapter 1381/5 or equivalent to
measure compression.

Note:
Refer to operating instructions for use of the
recorder.

- Operate starter until tester shows no additional
increase in pressure.

Compression pressures
New: 9-14 bar (131-203 psi)
Wear limit: 7.5 bar (109 psi)
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15-22

Hydraulic valve lifters, checking


Note:

Irregular valve noise during cranking is
normal.
Do not interchange hydraulic lifters. If
necessary mark them when they are being
removed.
Place lifters that have been removed on a clean
surface with the contact surface (camshaft end)
facing downward.
Hydraulic lifters cannot be repaired or adjusted.
Faulty lifters must be replaced.

- Start and run engine until warm-until radiator
coolant fan has come on at least once.

- Increase engine speed to approx. 2500 RPM for
2 minutes
If the irregular valve noise stops and then re-
occurs again each time vehicle is used in stop
and go traffic:

-
Replace the oil check valves Repair Group
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15-24

Valve stem oil seals, replacing


Cylinder head installed

- Remove toothed camshaft drive belt page 13
-
11
.

- Remove camshafts and hydraulic lifters.

- Remove spark plugs.

- Rotate crankshaft by hand to set piston of
appropriate cylinder to Bottom Dead Center
(BDC).

- Thread VW 653/3 hose, US 1106 cylinder
leakdown tester or equivalent with seal into
spark plug hole by hand and apply a continuous
pressure of at least 6 bar (87psi).

Note:
Tight valve keepers can be loosened by tapping lightly on lever VW 541/1
with a hammer. - Install compressor tool 2036 and adjust to height of studs.
- Remove valve spring with valve spring tensioner VW 541/1 and thrust
pad VW 541/5 or equivalent.
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15-25


- Remove valve stem oil seal with slide hammer 3047 A.
- Install new valve stem oil seal.

Note:
Always use the enclosed plastic sleeve for installation of valve stem oil
seals to protect the seal from being damaged by the valve keeper
grooves. - Fit protective sleeve over valve stem, slide seal carefully onto valve
guide.
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15-30

Replacing

CAUTION!

Cylinder heads with valve seats that can no
longer be refaced, or which have already
been machined to the minimum dimension,
should no longer be repaired.

CAUTION!
When the shoulder on the new guide makes contact, the pressing
force must not exceed 1.0 ton or the guide shoulder could break off. - Press out worn valve guides from camshaft side using drift 10-206.
(Replacement guides with shoulder must be pressed out from
combustion chamber side.)
- Coat new guides with oil and, using drift 3121, press into cold cylinder
head from camshaft side until shoulder makes contact.
- Use 7mm reamer 3120 to ream new valve guides to size, using plenty
of cutting fluid.
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