General
Displacement | 3.0L | ||
Number of cylinders | 6 | ||
Bore | 3.50 inch | ||
Stroke | 3.14 inch | ||
Firing order | 1-4-2-5-3-6 | ||
Oil pressure (Hot 2500 rpm) | 40-60 psi | ||
Cylinder head and valve train | Combustion chamber volume | 2.874 cu in. | |
Valve guide bore diameter | Intake and Exhaust | 0.2772 - 0.2763 inch | |
Valve seats | Width-Intake | 0.06-0.08 inch | |
Width-Exhaust | 0.08-0.10 in. | ||
Angle | 45° | ||
Runout (T.I.R.) | 0.003-0.004 in. | ||
Bore diameter insert counterbore diameter | Intake | 1.8542 in. MAX | |
1.8532 in. MIN | |||
Exhaust | 1.5645 in. MAX | ||
Gasket surface flatness | 0.003 in. over 6.00 in. | ||
Valve stem to guide clearance | Intake | 0.001-0.0028 inch | |
Exhaust | 0.0015-0.0033 inch | ||
Valve head diameter | Intake | 1.57 inch | |
Exhaust | 1.30 inch | ||
Valve face runout limit | 0.002 in. | ||
Valve face angle | 45° | ||
Valve stem diameter (STD) | Intake | 0.2744-0.2752 inch | |
Exhaust | 0.2740-0.2748 in. | ||
Over size | Intake | 0.289-0.290 inch | |
Exhaust | 0.289-0.290 inch | ||
Intake | 0.304-0.305 inch | ||
Exhaust | 0.304-0.305 inch | ||
Valve springs compression pressure | Valve open to maximum lift | 193-217 lb @ 1.17 inch | |
Valve closed | 64-72 lb 1.60 inch | ||
Free length (approximate) | 1.83 inch | ||
Installed spring height | 1.650-1.736 inch | ||
Service limit | 10% Force Loss @ Specified Height | ||
Rocker Arm | Ratio | 1:61 | |
Valve tappet, hydraulic | Diameter (Std) | 0.874 inch | |
Clearance to bore | 0.0007-0.0027 inch | ||
Service limit | 0.005 inch | ||
Leakdown rate | 20-200 seconds to leakdown 0.125 inch @50 lbs load and tappet filled with leak-down fluid. | ||
Collapsed tappet gap (nominal) | Intake | 0.088-0.189 inch | |
Exhaust | 0.088-0.189 inch | ||
Camshaft position sensor shaft bearing bore diameter | Tappet bore diameter | 0.8752-0.08767 inch | |
Camshaft bore inside diameter | No. 1 | 2.1531-2.1541 inch | |
No. 2 | 2.1334-2.1344 inch | ||
No. 3 | 2.1334-2.1344 inch | ||
No. 4 | 2.1531-2.1541 inch | ||
Camshaft | Lobe lift | Intake | 0.251 inch |
Exhaust | 0.264 inch | ||
Allowable lobe lift loss | 0.005 inch | ||
Theoretical valve lift @ zero lash | Intake | 0.404 inch | |
Exhaust | 0.424 inch | ||
End play | Service limit | 0.007 inch | |
Journal to bearing clearance | Clearance | 0.001-0.003 inch | |
Journal diameter | All | 2.0074 - 2.0084 inch | |
Cam bearing I.D. | 2.0094-2.0104 inch | ||
Runout limit | 0.002 inch Runout of #2 or #3 relative to #1 and #4 | ||
Out-of-round limit | 0.001 inch | ||
Cylinder block | Head gasket surface flatness | 0.003 inch @ 6.00 inch | |
Head gasket surface finish | 1.0-3.3 Micrometers (RMS) | ||
Cylinder bore | Diameter | 3.504 inch | |
Surface finish (RMS) | 0.45-0.96 micrometers | ||
Out-of-round limit | 0.001 inch | ||
Out-of-round service | 0.002 inch limit | ||
Taper service limit | 0.002 inch | ||
Main bearing bore diameter | 2.713 inch @ 2.712 in. | ||
Crankshaft and flywheel | Main bearing journal diameter | 2.5190-2.5198 in. | |
Out-of-round limit | 0.0003 in. | ||
Taper limit | 0.006 in @0.003 in per 1 in. | ||
Journal runout limit | 0.002 in. | ||
Surface finish (RMS) | 10.0 micro in. | ||
Thrust bearing journal | Length | 1.0148-1.067 inch | |
Connecting rod journal | Diameter | 2.1253-2.1261 inch | |
Out-of-round limit | 0.0003 inch MAX @ 0.0006 in Total | ||
Taper limit | 0.0003 in per inch | ||
Surface limit (RMS) | 0.25 micrometers | ||
Main bearing thrust face | Surface finish (RMS) | 0.4 micrometers | |
Runout limit | 0.001 inch | ||
Flywheel ring gear lateral turnout (T.I.R.) | Automatic transmission | 0.07 inch | |
Crankshaft end play | 0.004-0.008 inch | ||
Connecting rod bearings | Clearance to crankshaft | Desired | 0.001-0.0014 inch |
Allowable | 0.00086-0.0027 inch | ||
Bearing wall thickness (Std) | 0.0612-0.0618 inch | ||
Main bearings | Clearance to crankshaft | Desired | 0.001-0.0014 inch |
Allowable | 0.0005-0.0023 inch | ||
Bearing wall thickness | 0.0962-0.0976 inch 1st and 2nd 0.0980-0.0955 inch 3rd and Rear | ||
Connecting rod, piston and rings | Connecting rod | Piston pin bore diameter | 0.9096-0.9112 inch |
Crankshaft bearing bore diameter | 2.250-2.251 inch | ||
Length (center-to-center) | 5.530-5.533 inch | ||
Alignment (bore-to-bore max. diff.) | Twist | 0.003 per inch | |
Bend | 0.0016 per inch | ||
Side clearance (assembled to crank) | Standard | 0.006-0.014 inch | |
Service limit | 0.014 in MAX | ||
Piston Diameter | Coded red | 3.5024-3.5031 inch | |
Coded blue | 3.5035-3.5041 inch | ||
Coded yellow | 3.5045-3.5051 inch | ||
Piston-to-bore clearance | 0.0012-0.0022 inch | ||
Service limit | 0.031 inch Max | ||
Service piston selection When replacing pistons, measure the cylinder bore. Install the indicated service piston. | Piston bore diameter | Service piston grade required | |
Red | 3.5043-3.5053 inch | ||
Blue | 3.5053-3.5063 inch | ||
Yellow | 3.5063-3.5073 inch | ||
Ring groove width | Compression (top) | 0.0602-0.0612 inch | |
Compression (bottom) | 0.0602-0.0612 inch | ||
Oil | 0.1587-0.1596 inch | ||
Piston pin | Length | 2.248-2.278 inch | |
Diameter | 0.9119-0.9124 inch | ||
Pin to piston clearance | 0.002-0.0005 inch | ||
Pin to rod clearance | Press Fit 4 Kilonewtons 900 lbs. | ||
Piston rings - ring width | Compression (top) | 0.0575-0.0587 inch | |
Compression (bottom) | 0.0575-0.0587 inch | ||
Oil ring | Side Seal-Snug Fit | ||
Service limit | Side Clearance 0.0006 in MAX | ||
Ring gap | Compression (top) (in gauge) | 0.01-0.02 inch | |
Compression (bottom) | 0.01-0.02 in | ||
Oil ring (steel rail) (in gauge) | 0.010-0.049 in. | ||
Side clearance | 1st ring | 0.0016-0.0037 inch | |
2nd ring | 0.0016-0.0037 inch | ||
Lubrication system | Oil pump | Relief valve spring tension force @ length | 10.1-9.1 lb @ 1.11 in. |
Relief valve to bore clearance | 0.0029-0.0017 inch | ||
Oil pump gear backlash | 0.008-0.012 inch | ||
Oil pump gear radial clearance | Idler and driver | 0.0055-0.002 inch | |
Oil pump gear height clearance | 0.0027-0.0015 inch | ||
Idler shaft to idler gear clearance | 0.0027-0.0015 inch | ||
Driver shaft to housing clearance | 0.0019-0.0005 inch | ||
Oil capacity with filter change | 4.5 Quarts | ||
Drive belt tension | Vee-ribbed drive belts | 6 rib (non-serpentine) | |
New belt installation tension New belt installed and tensioned; engine not rotated. | 34-23 ft.lbs. | ||
Used belt reset tension Used belt is any belt that has been rotated on an engine. | 31-36 ft.lbs. | ||
Cold belt audit check Cold belt i.e., 3-hour soak ; 0 warm uo. | Allowable limits | 20 ft.lbs. |