- Joined
- Jul 24, 2022
- Messages
- 63
- Reaction score
- 44
- Points
- 18
- Location
- Utah
- Vehicle Year
- 1994
- Make / Model
- Mazda B4000
- Engine Type
- 4.0 V6
- Engine Size
- 4.0 OHV V6
- Transmission
- Manual
- 2WD / 4WD
- 4WD
*articles and machine shops will be updated as people give me info of other sources and shops near them*
Articles and Resources for Rebuild
The Ranger Station Performance Build Article
Engine Builder Mag Article on the History and Differences Between 4.0l Parts Over the Years
Machine Shops
Jensen Auto Service - Ogden, Utah
SPECS
*All measurements in inches*
Cylinder Head
Minimum Thickness:
2.8800"
Warp Spec:
0.006" OVERALL
Chamber Volume:
1990-1994: 60 CC'S 1995-2000: 48 CC'S (note: 98tm castings have smaller exhaust ports) Marnel 43 CC'S
Lifter Bore Diameter:
0.8742-0.8755"
Valves
Intake Valve Lash:
0.090-0.170" DRY
Exhaust Valve Lash:
0.090-0.170" DRY
Installed Stem Height:
1.7350-1.7450"
Stem Diameter:
Intake: 0.3159-0.3167" Exhaust: 0.3149-0.3156"
Head Diameter:
Intake: 1.710" Exhaust: 1.358"
Angle:
44°
Margin:
0.0310"
Guide Height:
0.650-0.660"
Guide Clearance:
Intake: 0.0008-0.0025" Exhaust: 0.0018-0.0035"
Seat Width:
0.060-0.079"
Seat Angle:
45°
Valve Springs
Free Length:
2.140"
Installed Height:
1.578-1.609"
Open Test Pressure:
162-175 LBS @ 1.180"
Close Test Pressure:
76-86 LBS @ 1.585"
Cylinder Block
Bore Diameter:
3.9527-3.9543"
Deck Height (Measured from main to deck):
8.8580"
Bore Center to Center
4.760"
Lifter Bore Diameter Oil Clearance:
0.0005-0.0022"
Crankshaft
Stroke:
3.325"
Cylinder Bore:
3.9527-3.9543"
Rod Journal
Rod Journal Diameter:
2.1252-2.1260"
Journal Width:
0.8220"
Oil Clearance (Rod Journal):
0.0005-0.0024"
Main Journal
Position 1-6:
2.2433-2.2441"
Oil Clearance (Main Journal):
0.0005-0.0019"
End Play:
0.0020-0.0125"
Thrust Width:
1.0390-1.0410"
Rear Seal Diameter:
2.3760"
Pulley Diameter:
1.1025"
Gear Diameter:
1.1025"
Connecting Rod
Big End Housing Bore:
2.2370-2.2378"
Big End Width:
0.9930"
Big End Side Clearance:
0.0002-0.0025"
Bolt Diameter:
0.315"
Small End Bore For Bushing:
0.9432-0.9439"
Small End Bore Finished Inside Diameter:
0.9432-0.9439"
Center To Center Distance:
5.748"
Twist/Bend:
Maximum 0.002/0.0006"
Service Limit:
0.014"
Camshaft
Lobe Lift:
Intake and Exhaust: 0.4024
Journal Diameters:
1. 1.9516-1.9524"
2. 1.9374-1.9382"
3. 1.9224-1.9232"
4. 1.9071-1.9079"
Journal Oil Clearance:
0.0010-0.0026
Camshaft End Play:
0.0008-0.004"
Lifter Diameter:
0.8742-0.8755"
Torque Specs
Intake Manifold:
Torque in steps 8,13,18 FT/LBS
Exhaust Manifold:
19 FT/LBS
Flywheel:
55-59 FT/LBS FLY, 20-34 FT/LBS FLEX
Flywheel surfacing: flat
Damper:
30-37 FT/LBS + 80°-90°
Main Bearing Cap:
66-77 FT/LBS
Connecting Rod:
18-24 FT/LBS
Cylinder Head:
44, 55 FT/LBS + 80°-85°
Camshaft Gear Bolt:
44-50 FT/LBS
Articles and Resources for Rebuild
The Ranger Station Performance Build Article
Engine Builder Mag Article on the History and Differences Between 4.0l Parts Over the Years
Machine Shops
Jensen Auto Service - Ogden, Utah
SPECS
*All measurements in inches*
Cylinder Head
Minimum Thickness:
2.8800"
Warp Spec:
0.006" OVERALL
Chamber Volume:
1990-1994: 60 CC'S 1995-2000: 48 CC'S (note: 98tm castings have smaller exhaust ports) Marnel 43 CC'S
Lifter Bore Diameter:
0.8742-0.8755"
Valves
Intake Valve Lash:
0.090-0.170" DRY
Exhaust Valve Lash:
0.090-0.170" DRY
Installed Stem Height:
1.7350-1.7450"
Stem Diameter:
Intake: 0.3159-0.3167" Exhaust: 0.3149-0.3156"
Head Diameter:
Intake: 1.710" Exhaust: 1.358"
Angle:
44°
Margin:
0.0310"
Guide Height:
0.650-0.660"
Guide Clearance:
Intake: 0.0008-0.0025" Exhaust: 0.0018-0.0035"
Seat Width:
0.060-0.079"
Seat Angle:
45°
Valve Springs
Free Length:
2.140"
Installed Height:
1.578-1.609"
Open Test Pressure:
162-175 LBS @ 1.180"
Close Test Pressure:
76-86 LBS @ 1.585"
Cylinder Block
Bore Diameter:
3.9527-3.9543"
Deck Height (Measured from main to deck):
8.8580"
Bore Center to Center
4.760"
Lifter Bore Diameter Oil Clearance:
0.0005-0.0022"
Crankshaft
Stroke:
3.325"
Cylinder Bore:
3.9527-3.9543"
Rod Journal
Rod Journal Diameter:
2.1252-2.1260"
Journal Width:
0.8220"
Oil Clearance (Rod Journal):
0.0005-0.0024"
Main Journal
Position 1-6:
2.2433-2.2441"
Oil Clearance (Main Journal):
0.0005-0.0019"
End Play:
0.0020-0.0125"
Thrust Width:
1.0390-1.0410"
Rear Seal Diameter:
2.3760"
Pulley Diameter:
1.1025"
Gear Diameter:
1.1025"
Connecting Rod
Big End Housing Bore:
2.2370-2.2378"
Big End Width:
0.9930"
Big End Side Clearance:
0.0002-0.0025"
Bolt Diameter:
0.315"
Small End Bore For Bushing:
0.9432-0.9439"
Small End Bore Finished Inside Diameter:
0.9432-0.9439"
Center To Center Distance:
5.748"
Twist/Bend:
Maximum 0.002/0.0006"
Service Limit:
0.014"
Camshaft
Lobe Lift:
Intake and Exhaust: 0.4024
Journal Diameters:
1. 1.9516-1.9524"
2. 1.9374-1.9382"
3. 1.9224-1.9232"
4. 1.9071-1.9079"
Journal Oil Clearance:
0.0010-0.0026
Camshaft End Play:
0.0008-0.004"
Lifter Diameter:
0.8742-0.8755"
Torque Specs
Intake Manifold:
Torque in steps 8,13,18 FT/LBS
Exhaust Manifold:
19 FT/LBS
Flywheel:
55-59 FT/LBS FLY, 20-34 FT/LBS FLEX
Flywheel surfacing: flat
Damper:
30-37 FT/LBS + 80°-90°
Main Bearing Cap:
66-77 FT/LBS
Connecting Rod:
18-24 FT/LBS
Cylinder Head:
44, 55 FT/LBS + 80°-85°
Camshaft Gear Bolt:
44-50 FT/LBS
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