GM Storm/Spectrum 1985-1993 Repair Guide

Water Pump

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REMOVAL & INSTALLATION



Except Twincam Engines

See Figures 1 and 2

  1. Disconnect the negative battery cable and drain the cooling system.
  2.  
  3. Loosen the power steering pump adjustment bolts and remove the drive belt.
  4.  
  5. Remove the timing belt; refer to the procedure later in this section.
  6.  
  7. Remove the tension pulley and spring.
  8.  
  9. Remove the water pump mounting bolts, water pump and gasket. Clean the mounting surfaces of all remaining gasket material.
  10.  
  11. To install, reverse the removal procedures. Tighten the water pump bolts to 17 ft. lbs. (23 Nm) and the tension pulley to 30 ft. lbs. (40 Nm).
  12.  
  13. Connect the negative battery cable and fill the cooling system, then start the engine and check for leaks.
  14.  



Click image to see an enlarged view

Fig. Fig. 1: Water pump and timing belt tension pulley - SOHC engines



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Fig. Fig. 2: Cut away view of the water pump assembly - SOHC engines

Twincam Engines

See Figure 3

1.6L DOHC ENGINE
  1. Disconnect the negative battery cable and drain the cooling system.
  2.  
  3. Support the engine using a suitable floor jack and remove the right front engine mount.
  4.  
  5. Remove the engine mount bridge and the upper timing belt cover.
  6.  
  7. Remove the power steering belt and the lower timing belt cover.
  8.  
  9. Loosen the timing belt tension pulley and remove the timing belt.
  10.  
  11. Remove the power steering pump and bracket.
  12.  
  13. Remove the water pump attaching bolts, then the water pump from the vehicle. Thoroughly clean all remaining gasket material from the mating surfaces.
  14.  
  15. Reverse procedure to install and tighten the water pump bolts to 17 ft. lbs. (24 Nm). Connect the negative battery cable and refill the cooling system. Start the engine and check for leaks.
  16.  

1.8L ENGINE
  1. Disconnect the negative battery cable and drain the engine cooling system.
  2.  
  3. Remove the timing belt covers; refer to the procedure later in this section. Loosen the timing belt tensioner pulley bolt, then remove the belt from the water pump pulley.
  4.  
  5. Remove the 2 bolts from the power steering pump bracket, then position the pump aside with the lines still attached. Be careful not to kink or damage the steering fluid lines.
  6.  
  7. Remove the water pump mounting bolts, then remove the pump from the engine. Thoroughly clean the gasket mating surfaces of all remaining gasket material.
  8.  

To install:
  1. Install the water pump using a new gasket, then tighten the retaining bolts to 18 ft. lbs. (24 Nm).
  2.  
  3. Position the power steering pump assembly, then install the retaining bolts and tighten to 25 ft. lbs. (34 Nm).
  4.  
  5. Install the timing belt to the pump pulley, then tighten the tensioner pulley bolt to 30 ft. lbs. (40 Nm).
  6.  
  7. Install the timing belt covers.
  8.  
  9. Connect the negative battery cable and fill the cooling system, then start the engine and check for leaks.
  10.  



Click image to see an enlarged view

Fig. Fig. 3: Water pump and timing belt tension pulley - DOHC engines

 
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