Escort L4-98 1.6L SOHC VIN 5 FI (1985)
Water Pump: Service and Repair
1.
Disconnect battery ground cable and drain coolant system.
2.
Remove accessory drive belts, then the engine front timing cover.
3.
Position No. 1 cylinder at TDC, then loosen both belt tensioner attaching bolts.
4.
Secure tensioner as far left as possible, then remove timing belt. Discard timing belt.
5.
Remove camshaft sprocket, then the rearward front timing cover stud.
6.
Disconnect heater return tube hose connection at water pump inlet tube.
7.
Remove water pump inlet tube fasteners, then the tube and gasket.
8.
Remove water pump to cylinder block bolts, then the water pump.
9.
Reverse procedure to install. Refer to ``Timing Belt, Replace'' for proper belt tension procedures.
TURBOCHARGER
The turbocharger is used to increase engine power on a demand basis. As engine load increases and the throttle opens, more air-fuel mixture flows into
the combustion chambers. As the increased flow is burned a larger volume of high energy exhaust gases enters the engine exhaust system and is directed
through the turbocharged turbine housing. Some of the exhaust gas energy is used to increase the speed of the turbine wheel which is connected to the
compressor wheel. The increased speed of the compressor wheel compresses the air-fuel mixture and delivers the compressed air-fuel mixture to the
intake manifold. The high pressure in the intake manifold allows a denser charge to enter the combustion chambers, in turn developing more engine
power during the combustion cycle. Turbocharger output is governed by an integral wastegate which controls the passage of exhaust gas past the turbine.
The electronic fuel injection system provides precise air-fuel mixture control. The fuel injectors at each cylinder intake port deliver more fuel when
needed for high turbocharger boost power output. The EEC-IV electronic engine control system provides precise control of fuel injection response to
throttle position, air temperature, engine temperature, altitude and engine emission levels. The EEC-IV system also controls spark timing, exhaust gas
recirculation and automatically shuts-off the air conditioner compressor at wide-open throttle to eliminate engine power drag when full engine output is
needed.
