Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1998ASTRO VAN 2WD V6-4.3L VIN WREPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTENGINESERVICE AND REPAIRENGINE OVERHAUL (UNIT REPAIR)ENGINE DISASSEMBLYENGINE BLOCK PLUG REMOVAL
1998 Chevrolet Astro Van 2WD V6-4.3L VIN W
Engine Block Plug Removal
1998 Chevrolet Astro Van 2WD V6-4.3L VIN WSECTION Engine Block Plug Removal
^ Tools Required
- J 41712 Oil Pressure Switch Socket
1. Remove the knock sensor from the engine block.
CAUTION: Wear safety glasses in order to avoid eye damage.
2. Remove the engine oil pressure gauge sensor using the J 41712.
3. Remove the engine oil pressure sensor fitting.
4. Remove the dowel straight pins (transmission locator) (if required).
5. Remove the engine block left side oil gallery plug.
6. Remove the engine block left rear oil gallery plug.
7. Remove the engine block right rear oil gallery plug.
8. Remove the expansion cup plug (camshaft rear bearing hole) and discard.
9. Remove the expansion cup plug (balance shaft rear bearing hole) and discard.
10. Remove the spring type S pin (crankshaft rear oil seal housing locator) (if required).
11. Remove the front oil gallery plugs or balls from the front of the engine block and discard.
Insert a 3/8 x 26 in. rod into the rear oil gallery holes and drive out the plugs or balls.
12. Remove the oil filter bypass valve and discard.
- J 41712 Oil Pressure Switch Socket
1. Remove the knock sensor from the engine block.
CAUTION: Wear safety glasses in order to avoid eye damage.
2. Remove the engine oil pressure gauge sensor using the J 41712.
3. Remove the engine oil pressure sensor fitting.
4. Remove the dowel straight pins (transmission locator) (if required).
5. Remove the engine block left side oil gallery plug.
6. Remove the engine block left rear oil gallery plug.
7. Remove the engine block right rear oil gallery plug.
8. Remove the expansion cup plug (camshaft rear bearing hole) and discard.
9. Remove the expansion cup plug (balance shaft rear bearing hole) and discard.
10. Remove the spring type S pin (crankshaft rear oil seal housing locator) (if required).
11. Remove the front oil gallery plugs or balls from the front of the engine block and discard.
Insert a 3/8 x 26 in. rod into the rear oil gallery holes and drive out the plugs or balls.
12. Remove the oil filter bypass valve and discard.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.