MSD 8381 GM LT-1 5.7L 93-94 Distributor Installation - Manual (Page 2)

2 INSTALLATION INSTRUCTIONS
M S D
• W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4
DISASSEMBLY
1. Disconnect the negative battery cable.
2. Locate the radiator petcock and drain the coolant from
the system.
3. Disconnect the MAF, IAC, ICT and TPS sensors (Figure
3). Remove the air intake ducktwork.
4. Once the coolant is drained, remove the upper radiator
hose from the thermostat housing.
5. Loosen the three bolts that secure the crankshaft
pulley/hub assembly. Do not remove them entirely at
this time.
6. Remove the accessory drive belt by moving the spring
loaded idler pulley. Use caution as this pulley is spring
loaded! The belt will slide off the pulley system and the
idler pulley will settle beyond its installed position.
7. Once the belt is removed, proceed with removing the
pulley from the crankshaft hub by pulling the three
retaining bolts. A puller will be required (Figure 4).
8. It may be necessary to remove the cooling fan. This is
done by removing the four bolts and disconnecting the
wiring connection.
9. Disconnect the air pump power wires and remove the
air pump from its mounting brackets.
10. Disconnect the coolant temperature wiring sensor
located on the water pump.
11. Loosen the lower radiator hose clamp and the two
heater hose clamps at the water pump. Coolant will
generally still pour out of the hoses and water pump.
12. To remove the water pump, the power steering pump
may need to be removed. With a short extension, the
water pump bolt should be able to be accessed. There
are six water pump bolts. Once again, more coolant
may spill out.
13. At this point, you should be able to access the distributor
cap! Mark the location of each spark plug wire before
removing them.
14. Remove the vacuum lines (if equipped) and the
distributor connector at the distributor and on the
passenger side of the intake manifold (Figure 5).
15. Using the supplied special tool and a 1/4" wrench,
Figure 6 Removing the Original Cap.
Figure 5 Disconnect the Distributor Connector.
Figure 7 Rotor Location.
MARK ROTOR
LOCATION
Figure 3 Disconnect TPS and IAC.
Figure 4 Removing the Hub.
IAC
TPS