2007-2009 Saturn Aura Repair Manual (P/N C30842)

• Covers 2007–2009 Saturn Aura models equipped with the 2.4L LAT inline 4-cylinder engine
• Original OEM publication C30842 featuring engine component identification, specific torque values, and diagnostic flow charts
• Contains 55 detailed exploded-view diagrams and assembly illustrations for the engine block, cylinder head, and intake components
• This 100-page OEM reference serves as the primary technical document for 2.4L powertrain mechanical maintenance

Engine Mechanical Architecture

This reference material outlines exact technical data for the 2.4L powertrain. You will find specific bore and stroke measurements, compression ratios, and piston ring end gaps essential for evaluating internal wear. Prior to beginning any teardown, always verify that shop equipment meets required safety standards and follow standard heavy-lifting precautions for engine blocks. The documentation structures critical clearances into accessible tables. This layout allows technicians to quickly verify tolerances directly at the workbench.

Diagnostic and Specification Highlights

Assembly data details fastener tightening sequences for major components. This includes cylinder head bolts, connecting rods, and the crankshaft balancer. To ensure maximum precision, all torque values appear in both metric (N.m) and standard (lb-ft/lb-in) units. For example, the cylinder head bolt torque requires a multi-stage sequence culminating in a precise final-stage angle of 155°.

Intake valve clearance is documented strictly at 0.030–0.057 mm. Crankshaft main bearing clearance sits tightly between 0.031 and 0.067 mm. You will also find peripheral specs, like the oil pump pressure relief valve plug, which must be torqued to 40 N.m (30 lb-ft). Please note that this document provides a contents overview for the reference manual. It does not contain step-by-step repair guides or diagnostic procedures.