• | J 43655 Camshaft Support Holding |
• | SA9127E-7 Fuel Pressure Flow |
Caution: Refer to Battery Disconnect Caution in the Preface section.
Caution: Whenever fuel line fittings are loosened or disconnected, wrap a shop cloth around the fitting to collect fuel. Place the cloth in an approved container.
Notice: An open-end wrench must be used to support the fuel line to rail connection during loosening/tightening to avoid damaging the fuel rail assembly.
Notice: To avoid valve piston contact, No. 1 cylinder piston must be positioned at approximately 60 degrees before-top dead center (BTDC). Pistons are properly positioned when the diamond shaped hole on the intake camshaft sprocket is located at 12 o'clock.
Important: To rotate camshafts, use a 24 mm open end wrench on camshaft flats. Camshafts should be rotated in a clockwise direction only, facing camshaft sprockets from passenger side of the vehicle.
Important: When removing guide bolts, do not drop the bolt down into the front cover area
Important: Lubricate the sprocket pins with clean motor oil. This will allow the sprockets to easily slide on the sprocket pins.
Notice: Refer to Fastener Notice in the Preface section.
Tighten
Tighten the support plate to cylinder head to 10 N·m (89 lb in).
Important:
• When sliding the timing chain and sprocket onto the guide pins, be sure the timing chain is positioned properly on the adjustable and fixed guide or guide damage will occur. Care should be taken when removing the sprockets from the camshafts. • Camshafts are spring loaded and may rotate. Care should be taken until all spring tension is removed from the camshaft.
Notice: After cylinder block, head, or lifter replacement, it will be necessary to allow the engine to idle for 3-5 minutes. If the lifters are noisy, warm the engine up at less than 200 RPM. After the coolant temperature has reached approximately 85°C (185°F), cycle the engine RPM from idle to 300 RPM for approximately 10 minutes or drive the vehicle 8 kilometers (5 miles) to purge the air. If the air cannot be purged, the faulty lifters will have to be replaced.
Notice: Lifters that are pumped up may cause PCM misfire codes to set. Continue to operate the engine until the lifters bleed down. Using the scan tool, clear the codes and malfunction history.
Notice: If a valve seal is removed after it has been installed, it must be discarded. The valve stem lock groove will cut the seal's lip during removal. Use extreme care when installing valve retainers and do not damage the valve stems.
Notice: Refer to Fastener Notice in the Preface section.
Tighten
Tighten the camshaft cap bolts to 10 N·m (89 lb in).
Important:
• Ensure that the alignment slots are correctly aligned with the notches in the camshaft sprockets before final tightening is applied. • Verify the timing chain is properly positioned on the fixed guide or guide damage will occur. • Verify the camshafts are properly timed as outlined in this section prior to starting the engine.
Tighten
Tighten the camshaft sprocket bolts to 85 N·m (63 lb ft) +30 degrees.
Tighten
Tighten the camshaft bearing cap bolts to 10 N·m (89 lb in).
Important: Apply Permatex® Threadlocker Blue to the upper timing chain guide bolts. Refer to Adhesives, Fluids, Lubricants, and Sealers for the correct part number.
Tighten
Tighten the timing chain guide upper bolts to 10 N·m (89 lb in).
Important: Apply sealant GM P/N 12378521 (Canadian P/N 88901148) to the cylinder head near the rear intake cap as shown.
Tighten
Tighten the intake camshaft rear cap to 25 N·m (18 lb ft).
Tighten
Tighten the power steering block-off plate to 25 N·m (18 lb ft).
Tighten
Tighten the camshaft cover bolts to 10 N·m (89 lb in).
Notice: An open-end wrench must be used to support the fuel line to rail connection during loosening/tightening to avoid damaging the fuel rail assembly.
Tighten
Tighten the transfer line fitting-to-fuel rail to 10 N·m (89 lb in).
Tighten
Tighten the fuel line transfer bolt to 10 N·m (89 lb in).
Tighten
Tighten the camshaft cover ground strap bolts to 10 N·m (89 lb in).
Tighten
Tighten the coolant pipe bracket bolt to 10 N·m (89 lb in).
Tighten
Tighten the spark plugs to 20 N·m (15 lb ft).
Tighten
Tighten the ignition module-to-camshaft cover bolts to 8 N·m (71 lb in).
Tighten
Tighten the battery terminal bolt to 17 N·m (13 lb ft).