sion. If a machined groove on the plunger is visible
(Fig. 118), the timing chain and/or related compo-
nents are worn or stretched to service limits.
(3) Inspect all chain guides, sprockets and tension-
ers for wear. Replace as necessary following the pro-
cedures this section.
SPECIFICATIONS
2.7L ENGINE
DESCRIPTION SPECIFICATION
General Specifications
Type 60° DOHC V-6 24-Valve
Displacement 2.7 Liters (167 Cubic
Inches)
Bore & Stroke
86.0 x 78.5 mm
(3.386 in. x 3.091 in.)
Compression Ratio 9.67:1
Lead Cylinder #1 Right Bank
Firing Order 1-2-3-4-5-6
Cylinder Block
Cylinder Bore Diameter 86.0 mm
(3.3859 in.)
Out of Round (Max.) 0.076 mm
(0.003 in.)
Taper (Max.) 0.051 mm
(0.002 in.)
Pistons
Material Aluminum Alloy
Piston Diameter 85.981 mm 60.013
(3.3851 in. 60.0006)
DESCRIPTION SPECIFICATION
Clearance at Size
Location
– 0.0016 to +0.0396 mm
(– 0.0001 to +0.0016 in.)
Piston Weight 316–326 grams
(11.1466–11.4994 oz.)
Piston Ring Groove
Diameter—No. 1
77.65–77.85 mm
(3.0571–3.065 in.)
Piston Ring Groove
Diameter—No. 2
75.72–75.92 mm
(2.9811–2.989 in.)
Piston Ring Groove
Diameter—No. 3
77.42–77.62 mm
(3.0481–3.0559 in.)
Piston Pins
Type Full Floating
Pin Diameter 21.997–22.000 mm
(0.8661–0.8662 in.)
Clearance in Piston 0.002–0.010 mm
(0.0001–0.0004 in.)
Clearance in Rod 0.007–0.018 mm
(0.0003–0.0008 in.)
Piston Rings
Ring Gap—Top
Compression Ring
0.20–0.36 mm
(0.008–0.014 in.)
Ring Gap—2nd
Compression Ring
0.37–0.63 mm
(0.0146–0.0249 in.)
Ring Gap—Oil Control
(Steel Rails)
0.25–0.76 mm
(0.010–0.030 in.)
Piston Ring Side Clearance
Compression Rings—Top
and Second
0.040–0.080 mm
(0.0016–0.0031 in.)
Oil Ring (Steel Rails) 0.061–0.207 mm
(0.0025–0.0082 in.)
Piston Ring Width
Compresion Rings—Top
and Second
1.47–1.49 mm
(0.0579–0.0587 in.)
Oil Ring (Steel Rails) 0.445–0.470 mm
(0.0176–0.0186 in.)
Connecting Rods
Bearing Clearance 0.024–0.064 mm
(0.001–0.0026 in.)
Side Clearance 0.13–0.38 mm
(0.0052–0.015 in.)
Fig. 118 Primary Timing Chain Tensioner
1 – MAXIMUM WEAR INDICATOR GROOVE
LH 2.7L ENGINE 9 - 67
CLEANING AND INSPECTION (Continued)
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