2003 FORD MUSTANG lash adjuster

z
excessive connecting rod bearing clearance
Valve Train Analysis— Engine Off—Valve Cover Removed
Check for damaged or severely worn parts and correct assembly. Make sure correct parts are used
with the static engine analysis as follows.
Valve Train Analysis— Engine Off, Rocker Arm
z Check for loose mounting bolts, studs and nuts.
z Check for plugged oil feed in the rocker arms (6564) or cylinder head.
Valve Train Analysis— Engine Off, Camshaft Roller Followers and Hydraulic Lash Adjusters,
Overhead Camshaft
zCheck for loose mounting bolts on camshaft carriers.
z Check for plugged oil feed in the camshaft roller followers, lash adjusters or cylinder heads.
Valve Train Analysis— Engine Off, Camshaft— Engines
z Check for broken or damaged parts.
Valve Train Analysis— Engine Off, Push Rods
z Check for bent push rods (6565) and restricted oil passage.
Valve Train Analysis— Valve Springs
z Check for broken or damaged parts.
Valve Train Analysis— Engine Off, Valve Spring Retainer and Valve Spring Retainer Keys
z Check for correct seating of the valve spring retainer key (6518) on the valve stem and in valve
spring retainer (6514).
z Check for correct seating on the valve stem.
Valve Train Analysis— Engine Off, Valves and Cylinder Head
z Check for plugged oil drain back holes.
z Check for worn or damaged valve tips.
z Check for missing or damaged guide- mounted valve stem seal.
z Check collapsed valve tappet gap.
z Check installed valve spring height.
z Check for missing or worn valve spring seats.
z Check for plugged oil metering orifice in cylinder head oil reservoir (if equipped).
Static checks (engine off) are to be made on the engine prior to the dynamic procedure. Klj . 14 ba
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Valve seat angle 44.75 degrees
Valve spring free length —
Valve spring squareness —
Valve spring compression pressure —
valve
open (without damper) 1000 N (224 lbs) @ 29.2 mm (1.16 in)
Valve spring compression pressure —
valve
closed (without damper) 350 N (79 lbs) @ 40.7 mm (1.62 in)
Valve spring installed height 40.7 mm (1.62 in)
Valve spring installed pressure —
Rocker arm ratio 1.73
Hydraulic Lash Adjuster
Diameter 22.195-
22.212 mm (0.8738- 0.8745 in) Clearance-
to-bore 0.018-
0.068 mm (0.0007- 0.0027 in) Service limit 0.127 mm (0.005 in)
Hydraulic leakdown rate a
Collapsed lash adjuster gap —
Camshaft
Theoretical valve lift @ 0 lash —
intake 11.30 mm (0.45 in)
Theoretical valve lift @ 0 lash —
exhaust 11.47 mm (0.45 in)
Lobe lift —
intake 6.53 mm (0.257 in)
Lobe lift —
exhaust 6.57 mm (0.259 in)
Allowable lobe lift loss 0.127 mm (0.005 in)
Journal diameter 52.082-
52.108 mm (2.0505- 2.0515 in) Camshaft journal bore inside diameter —
No. 1 55.689-
55.664 mm (2.192- 2.191 in) Camshaft journal bore inside diameter —
No. 2
and No. 3 55.308-
55.283 mm (2.177- 2.176 in) Camshaft journal bore inside diameter —
No. 4 55.684-
55.664 mm (2.192- 2.191 in) Camshaft journal-
to-bearing clearance 0.025-
0.076 mm (0.001- 0.003 in) Runout 0.05 mm (0.002 in) runout of No. 2 or No. 3
relative to No. 1 and No. 4 End play 0.025-
0.150 mm (0.001- 0.006 in) Cylinder Block
Cylinder bore diameter 96.813 mm (3.81 in)
Cylinder bore maximum taper 0.050 mm (0.002 in)
Cylinder bore maximum out-of-
round 0.050 mm (0.002 in)
Main bearing bore inside diameter 68.905 mm (2.713 in)
68.885 mm (2.712 in)
Camshaft bearing bore inside diameter —
intake 47.097 mm (1.8542 in) max. 47.072 mm (1.8532
in) min. Camshaft bearing bore inside diameter —
exhaust 39.739 mm (1.5645 in) max. 39.714 mm (1.5635
in) min. Head gasket surface flatness 0.08 mm (0.003 in) in 152.0 mm (6.00 in)
Crankshaft
Main bearing journal diameter 63.983-
64.003 mm (2.5190- 2.5198 in) Klj . 2 ba
62003 Mustang Workshop Manual
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Valve spring installed height 42.3-
42.9 mm (1.67- 1.69 in) Valve spring installed pressure 283.0-
321.0 N @ 42.56 mm (63.61 lb @ 1.68 in) Roller follower ratio —
intake 2.02:1
Roller follower ratio —
exhaust 2.03:1
Hydraulic Lash Adjuster
Diameter 16.000-
15.988 mm (0.6299- 0.6294 in) Clearance-
to-bore 0.018-
0.069 mm (0.0007- 0.0027 in) Service limit 15.988 mm
Hydraulic leakdown rate
c 5-
25 seconds Collapsed lash adjuster gap —
desired 0.45-
0.85 mm (0.02- 0.03 in) Camshaft
Theoretical valve lift @ 0 lash —
intake 13.00 mm (0.51 in)
Theoretical valve lift @ 0 lash —
exhaust 13.75 mm (0.54 in)
Lobe lift —
intake 7.11038 mm (0.28 in)
Lobe lift —
exhaust 7.4794 mm (0.30 in)
Allowable lobe lift loss 0 mm (0.0 in)
Journal diameter 26.962-
26.936 mm (1.0615- 1.0605 in) Camshaft journal bore inside diameter 27.012-
26.987 mm (1.0635- 1.0625 in) Camshaft journal-
to-bearing clearance 0.025-
0.076 mm (0.00098- 0.002992 in) Camshaft journal-
to-bearing clearance —
service limit 0.100 mm (0.003937 in) max.
Runout —
Front and rear journals 0.03 mm (0.001 in)
Runout —
four inner journals 0.09 mm (0.003 in)
End play 0.027-
0.190 mm (0.001- 0.007 in) End play —
service limit 0.190 mm (0.007480 in)
Cylinder Block
Cylinder bore diameter 31 mm (1.24 in) from top of block
red — 90.200-90.210
blue — 90.210-90.220
yellow — 90.220-90.230 Cylinder bore maximum taper 0.70 mm (0.027559 in)
Cylinder bore maximum out-of-
round —limit 0.20 mm (0.007874 in)
Cylinder bore maximum out-of-
round —service
limit 0.70 mm (0.027559 in)
Main bearing bore inside diameter 72.400-
72.424 mm (2.8504- 2.8513 in) Crankshaft
Main bearing journal diameter 67.482-
67.504 mm (2.66- 21.661 in) Main bearing journal maximum taper 0.004 mm (0.0002 in)
Main bearing journal maximum out-of-
round 0.05 mm (0.002 in)
Main bearing journal-
to-cylinder block clearance
— desired 0.025-
0.044 mm (0.001- 0.002 in) Main bearing journal-
to-cylinder block clearance
— allowable 0.025-
0.050 mm (0.00098- 0.00197 in) Connecting rod journal diameter 52.983-
53.003 mm (2.085941- 2.086728 in) Klj . 2 ba
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IN-
VEHICLE REPAIR
Hydraulic Lash Adjuster
Removal and Installation 1. Remove the roller followers. For additional information, refer to Camshaft Roller Follower in this
section.
2. Remove the eight hydraulic lash adjusters.
3. Inspect the lash adjusters. For additional information, refer to Section 303 - 00 .
4. To install, reverse the removal procedure.
SECTION 303-
01B: Engine — 4.6L (2V) 2003 Mustang Workshop Manual Klj . 1 ba
12003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

55.
NOTE: The hydraulic lash adjusters must be reinstalled in their original locations. Record the
hydraulic lash adjuster locations.
Remove the hydraulic lash adjusters.
RH cylinder head 56. CAUTION: The cylinder head must be cool before removing it from the engine.
Cylinder head warpage can result if a warm or hot cylinder head is removed.
CAUTION: Place clean shop towels over exposed engine cavities. Carefully remove
the towels so foreign material is not dropped into the engine.
CAUTION: The cylinder head bolts must be discarded and new bolts installed. They
are tighten- to-yield designed and cannot be reused.
CAUTION: Do not use metal scrapers, wire brushes, power abrasive discs or other
abrasive means to clean the sealing surfaces. These tools cause scratches and gouges
that make leak paths. Use a plastic scraping tool to remove all traces of the head gasket.
CAUTION: Aluminum surfaces are soft and can be scratched easily. Never place the
cylinder head gasket surface, unprotected, on a bench surface.
Remove the bolts and the RH cylinder head.
zDiscard the cylinder head gasket.
z Discard the cylinder head bolts. Klj . 18 ba
212003 Mustang Workshop Manual
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3. Using the special tool, compress the valve spring.
4. Remove the valves.
1. Remove the valve spring retainer keys.
2. Remove the valve spring retainers.
3. Remove the valve spring.
4. Remove the valves.
5. Remove the hydraulic lash adjusters.
6. Remove the bolts and the camshaft bearing caps. Klj . 2 ba
42003 Mustang Workshop Manual
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4. Remove the special tools from both ends of the cylinder head.
NOTE: Lubricate the hydraulic lash adjusters with clean engine oil.
5. Install the hydraulic lash adjusters in their original locations.
6. CAUTION: Timing chain procedures must be followed exactly or damage to the
valves and pistons will result.
NOTE: LH shown, RH similar. Klj . 4 ba
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Valve head diameter—
exhaust 30 mm (1.18 inch)
Valve face runout 0.05 mm (0.002 in)
Valve face angle 45.5 degrees
Valve seat width—
intake 1.8-
2.2 mm (0.071- 0.086 inch) Valve seat width—
exhaust 1.8-
2.2 mm (0.071- 0.086 inch) Valve seat runout 0.05 mm (0.002 inch)
Valve seat angle 45 degrees
Valve spring free length—
intake 42.16 mm (1.6598 inch)
Valve spring free length—
exhaust 42.16 mm (1.6598 inch)
Valve spring squareness 2 degrees
Valve spring compression pressure—
intake 711.47 N @ 26.19 mm (159.9 lb-
ft @
1.031 inch) Valve spring compression pressure—
exhaust 711.47 N @ 26.19 mm (159.9 lb-
ft @
1.031 inch) Valve spring installed height 36.14 mm (1.4228 in)
Valve spring installed pressure—
intake 289.1 N @ 36.14 mm (64.99 lb-
ft @
1.4228 inch) Valve spring installed pressure—
exhaust 289.1 N @ 36.14 mm (64.99 lb-
ft @
1.4228 inch) Roller follower ratio 1.8:1
Hydraulic Lash Adjuster
Diameter 16.000-
15.988 mm (0.6299- 0.6294 inch) Clearance-
to-bore 0.018-
0.069 mm (0.000709- 0.002717
inch) Service limit 0.016 mm (1.0006299 inch)
Hydraulic leakdown rate
c 5-
25 seconds Collapsed lash adjuster gap 0.80-
1.20 mm (0.0315- 0.0472 inch) Camshaft
Theoretical valve lift @ 0 lash—
intake (primary and
secondary) 10.0 mm (0.3937 inch)
Theoretical valve lift @ 0 lash—
exhaust 10.0 mm (0.3937 inch)
Lobe lift 5.54 mm (0.218 in)
Allowable lobe lift loss 0.130 mm (0.0051 in)
Journal diameter 26.962-
26.936 mm (1.0615- 1.0605 inch) Camshaft journal bore inside diameter 27.012-
26.987 mm (1.0635- 1.0625 in) Camshaft journal-
to bearing clearance 0.025-
0.076 mm (0.00098- 0.002992
inch) Runout 0.025 mm (0.0010 in)
End play 0.025-
0.165 mm (0.00098- 0.00649 inch) Cylinder Block
Cylinder bore diameter 90.2-
90.239 mm Cylinder bore maximum taper 0.016 mm
Cylinder bore maximum out-of-
round 0.016 mm
Main bearing bore diameter 72.402-
72.422 mm Klj . 2 ba
62003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...