Oil Pump Drive Chain Tensioner Installation

Special Tools 

EN-50513  Fixing Pin

For equivalent regional tools, refer to Special Tools .

NOTE:

Before installing the oil pump drive chain tensioner, check the components of the timing chain system for damage and wear.

1. Check the components of the timing chain system for damage and wear:
   • Timing chain guides with plastic attachment
   • Timing chain tensioner and timing chain tensioner shoe with plastic attachment
   • Timing chain and all timing chain sprockets
   • Oil pump sprocket
   • Oil pump drive chain tensioner
Fig 1: Oil Pump Drive Chain Tensioner, Bolts And Fixing Pin
Courtesy of GENERAL MOTORS COMPANY
2. Install the oil pump drive chain tensioner (1).
3. Install the oil pump drive chain tensioner bolts (2, 4).
CAUTION:

Refer to Fastener Caution .

4. Tighten the oil pump drive chain tensioner bolt (2) to 25 N.m (18 lb ft).
5. Tighten the oil pump drive chain tensioner bolt (4) to 10 N.m (89 lb in).
Fig 2: Oil Pump Drive Chain Tensioner And Fixing Pin
Courtesy of GENERAL MOTORS COMPANY
6. Remove the EN-50513  fixing pin (2).