Tools Required

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

SA9178NE-A Dial Bore Gauge. See Special Tools .

Fig 1: Measure Cylinder Bore Wear And Taper

Courtesy of GENERAL MOTORS CORP.

Using the SA9178NE-A , measure the cylinder bore wear and taper. See Special Tools .
1. Measure the bore both parallel and perpendicular to the crankshaft.
2. Measure the bore at the top, center and bottom of each cylinder. If the bore size or taper exceeds the service limit of 89.065 mm (3.5065 in), the block must be bored and fitted with oversized pistons. Scored or scratched cylinder bores must be honed.
  Specification:
  - Cylinder bore diameter - new: 89.0-89.015 mm (3.5039-3.5045 in)
  - Cylinder bore diameter - service limit: 89.065 mm (3.5065 in)
  - Cylinder bore diameter - with 0.25 mm oversize pistons: 89.25-89.265 mm (3.5138-3.5144 in)
  - Maximum reboring limit: 0.25 mm (0.01 in)
  - Cylinder bore taper limit: 0.05 mm (0.002 in) measured at the top and bottom of the cylinder bore

Fig 2: Measuring Cylinder Block Warpage

Courtesy of GENERAL MOTORS CORP.

Using a straight edge and feeler gage, measure the top of the cylinder block for warpage.
Specification:
- Cylinder block deck surface flatness - new: 0.07 mm (0.003 in) maximum
- Cylinder block deck surface flatness - service limit: 0.1 mm (0.004 in)
Inspect for the following conditions:
- Gasket sealing surfaces for excessive scratches or gouging
- Threaded bolt holes for damaged threads
- Restrictions within the coolant or oil passages