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3.7L Engine - Service Information: Application RAM Pickup 3500

Mechanical 1 illustration ~373 words

FORM-IN-PLACE GASKET AND SEALER APPLICATION

Assembling parts using a form-in-place gasket requires care but it's easier than using precut gaskets.

Mopar® Gasket Maker material should be applied sparingly 1 mm (0.040 in.) diameter or less of sealant to one gasket surface. Be certain the material surrounds each mounting hole. Excess material can easily be wiped off. Components should be torqued in place within 15 minutes. The use of a locating dowel is recommended during assembly to prevent smearing material off the location.

Mopar® Engine RTV GEN II or ATF RTV gasket material should be applied in a continuous bead approximately 3 mm (0.120 in.) in diameter. All mounting holes must be circled. For corner sealing, a 3.17 or 6.35 mm (1/8 or 1/4 in.) drop is placed in the center of the gasket contact area. Uncured sealant may be removed with a shop towel. Components should be torqued in place while the sealant is still wet to the touch (within 10 minutes). The usage of a locating dowel is recommended during assembly to prevent smearing material off the location.

Mopar® Gasket Sealant in an aerosol can should be applied using a thin, even coat sprayed completely over both surfaces to be joined, and both sides of a gasket. Then proceed with assembly. Material in a can w/applicator can be brushed on evenly over the sealing surfaces. Material in an aerosol can should be used on engines with multi-layer steel gaskets.

Scheme 125

Scheme 125: ENGINE GASKET SURFACE PREPARATION
Scheme 125: ENGINE GASKET SURFACE PREPARATION
1 - ABRASIVE PAD
2 - 3M ROLOC™ BRISTLE DISC
3 - PLASTIC/WOOD SCRAPER

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

Never use the following to clean gasket surfaces

  1. Metal scraper (3).
  2. Abrasive pad (1) or paper to clean cylinder block and head.
  3. High speed power tool (1) with an abrasive pad or a wire brush.

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

Only use the following for cleaning gasket surfaces

  1. Solvent or a commercially available gasket remover
  2. Plastic or wood scraper.
  3. Drill motor with 3M Roloc™ Bristle Disc (white or yellow).
CAUTIONExcessive pressure or high RPM (beyond the recommended speed), can damage the sealing surfaces. The mild (white, 120 grit) bristle disc is recommended. If necessary, the medium (yellow, 80 grit) bristle disc may be used on cast iron surfaces with care.
DESCRIPTIONSPECIFICATION
Type90° SOHC V6 12 Valve
Number of Cylinders6
Firing Order1-6-5-4-3-2
Lead CylinderNo. 1 Left Bank
Compression Ratio9.6:1
Max. Variation Between Cylinders25%
MetricStandard
Displacement3.7 Liters226 Cubic Inches
Bore93.0 mm3.66 in.
Stroke90.8 mm3.40 in.
Horsepower211 @ 5200 RPM
Torque236 ft. lbs. @ 4000 RPM
Compression Pressure1172-1551 kPa170-225 psi

GENERAL SPECIFICATIONS

DESCRIPTIONSPECIFICATION
MetricStandard
Bore Diameter93.013 ± 0.0075 mm3.6619 ± 0.0003 in.
Out of Round (MAX)0.076 mm0.003 in.
Taper (MAX)0.051 mm0.002 in.

CYLINDER BLOCK

DESCRIPTIONSPECIFICATION
MetricStandard
Diameter92.975 mm3.6605 in.
Weight365.0 grams12.87 oz.
Ring Groove Diameter
No. 185.37 - 83.13 mm3.282 - 3.273 in
No. 282.833 - 83.033 mm3.261 - 3.310 in.
No. 383.88 - 84.08 mm3.302 - 3.310 in.

PISTONS

DESCRIPTIONSPECIFICATION
MetricStandard
Clearance In Piston0.006 - 0.015 mm0.0002 - 0.0005 in.
Diameter24.017 - 24.020 mm0.9455 - 0.9456 in.

PISTON PINS

DESCRIPTIONSPECIFICATION
MetricStandard
Ring Gap
Top Compression Ring0.20 - 0.36 mm0.0079 - 0.0142 in.
Second Compression Ring0.37 - 0.63 mm0.0146 - 0.0249 in.
Oil Control (Steel Rails)0.25 - 0.76 mm0.0099 - 0.30 in.
Side Clearance
Top Compression Ring0.051 - 0.094 mm0.0020 - 0.0037 in.
Second Compression Ring0.040 - 0.080 mm0.0016 - 0.0031 in.
Oil Ring (Steel Ring)0.019 - 0.229 mm0.0007 - 0.0091 in.
Ring Width
Top Compression Ring1.472 - 1.490 mm0.057 - 0.058 in.
Second Compression Ring1.472 - 1.490 mm0.057 - 0.058 in.
Oil Ring (Steel Rails)0.445 - 0.470 mm0.017 - 0.018 in.

PISTON RINGS

DESCRIPTIONSPECIFICATION
MetricStandard
Bearing Clearance0.006 - 0.044 mm0.0002 - 0.0017 in.
Side Clearance0.10 - 0.35 mm0.004 - 0.0138 in.
Piston Pin Clearance0.015 - 0.028 mm0.0006 - 0.0011 in.
Bearing Bore Out of Round (MAX)0.004 mm0.0002 in.
Total Weight (Less Bearing)612 grams21.588 ounces

CONNECTING RODS

DESCRIPTIONSPECIFICATION
MetricStandard
Main Bearing Journal Diameter63.488 - 63.512 mm2.4996 - 2.5005 in.
Bearing Clearance0.002 - 0.046 mm0.00008 - 0.0018 in.
Out of Round (MAX)0.005 mm0.0002 in.
Taper (MAX)0.006 mm0.0004 in.
End Play0.052 - 0.282 mm0.0021 - 0.0112 in.
End Play (MAX)0.282 mm0.0112 in.
Connecting Rod Journal Diameter57.908 - 57.892 mm2.2798 - 2.2792 in.
Bearing Clearance0.006 - 0.0440.0002 - 0.0011 in.
Out of Round (MAX)0.005 mm0.0002 in.
Taper (MAX)0.006 mm0.0002 in.

CRANKSHAFT

DESCRIPTIONSPECIFICATION
MetricStandard
Bore Diameter26.02 - 26.04 mm1.0245 - 1.0252 in.
Bearing Journal Diameter25.975 - 25.995 mm1.0227 - 1.0235 in.
Bearing Clearance0.025 - 0.065 mm0.001 - 0.0026 in.
Bearing Clearance (MAX)0.065 mm0.0026 in.
End Play0.075 -0.200 mm0.003 - 0.0079 in.
End Play (MAX)0.200 mm0.0079 in.

CAMSHAFT

DESCRIPTIONSPECIFICATION
Intake
Opens (BTDC)5.6°
Closes (ATDC)240.1°
Duration245.7°
Exhaust
Opens (BTDC)241.5°
Closes (ATDC)20.1°
Duration261.6°
Valve Overlap25.7°

VALVE TIMING

DESCRIPTIONSPECIFICATION
MetricStandard
Face Angle45° - 45.5°
Head Diameter
Intake48.52 - 48.78 mm1.9103 - 1.9205 in.
Exhaust36.87 - 37.13 mm1.4516 - 1.4618 in.
Length (Overall)
Intake113.45 - 114.21 mm4.4666 - 4.4965 in.
Exhaust114.92 - 115.68 mm4.5244 - 4.5543 in.
Stem Diameter
Intake6.931 - 6.957 mm0.2729 - 0.2739 in.
Exhaust6.902 - 6.928 mm0.2717 - 0.2728 in.
Stem-to-Guide Clearance
Intake0.018 - 0.069 mm0.0008 - 0.0028 in.
Exhaust0.047 - 0.098 mm0.0019 - 0.0039 in.
Max. Allowable Stem-to-Guide Clearance (Rocking Method)
Intake0.069 mm0.0028 in.
Exhaust0.098 mm0.0039 in.
Valve Lift (Zero Lash)
Intake12.00 mm0.472 in.
Exhaust12.00 mm0.472 in.

VALVES

DESCRIPTIONSPECIFICATION
MetricStandard
Free Length (Approx)
Intake48.18 mm1.896 in.
Exhaust - w/damper49.2 mm1.973 in.
Spring Force (Valve Closed)
Intake332.0 - 368.0 N @ 40.12 mm74.63 - 82.72 lbs. @ 1.5795 in.
Exhaust - (without damper)356 - 394 N @ 39.12 mm80.031 - 88.57 lbs. @ 1.54 in.
Spring Force (Valve Open)
Intake948.0 - 1038.0 N @ 28.12 mm213.2 - 233.8 lbs. @ 1.107 in.
Exhaust - without damper874 - 956 N @ 27.12 mm196.5 - 214.9 lbs. @ 1.067 in.
Number of Coils
Intake7.30
Exhaust7.15
Wire Diameter
Intake4.77 -- 3.80 mm0.1878 -- 0.1496 in.
Exhaust4.66 -- 3.72 mm0.1843 --.1464 in.
Installed Height (Spring Seat to Bottom of Retainer)
Nominal
Intake40.12 mm1.579 in.
Exhaust - w/damper40.12 mm1.579 in.

VALVE SPRING

DESCRIPTIONSPECIFICATION
MetricStandard
Gasket Thickness (Compressed)0.7 mm(0.0276 in.)
Valve Seat Angle44.5° - 45.0°
Valve Seat Runout (MAX)0.051 mm0.002 in.
Valve Seat Width
Intake1.75 - 2.36 mm0.0698 - 0.0928 in.
Exhaust1.71 - 2.32 mm0.0673 - 0.0911 in.
Guide Bore Diameter (Std.)6.975 - 7.00 mm0.2747 - 0.2756 in.
Cylinder Head Warpage (Flatness)0.0508 mm0.002 in.

CYLINDER HEAD

DESCRIPTIONSPECIFICATION
MetricStandard
Clearance Over Rotors/End Face (MAX)0.095 mm0.0038 in.
Cover Out - of - Flat (MAX)0.025 mm0.001 in.
Inner and Outer Rotor Thickness12.02 mm0.4731 in.
Outer Rotor to pocket (Diametral) clearance (MAX).235 mm0.0093 in.
Outer Rotor Diameter (MIN)85.925 mm0.400 in.
Tip Clearance Between Rotors (MAX)0.150 mm0.006 in.

OIL PUMP

SPECIFICATIONSPECIFICATION
MetricStandard
At Curb Idle Speed (MIN)*25 kPa4 psi
@ 3000 RPM170 - 758 kPa25 - 110 psi
* CAUTION: If pressure is zero at curb idle, DO NOT run engine at 3000 RPM.

OIL PRESSURE

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