VALVE LIFTER Nissan Armada I

VALVE LIFTER

Check if the surface of the valve lifter has any wear or cracks.

Scheme 182

1. If any damage is found, replace the valve lifter.
2. Select the thickness of the head so that the valve clearance is within the standard when replacing. Refer to «VALVE CLEARANCE»(ref-233240-S08124944862006052500000) .

Scheme 183

1. Measure the diameter of the valve lifter. Standard: 33.977-33.987 mm (1.3377-1.3381 in)

Scheme 184

1. Measure the diameter of the valve lifter hole of the cylinder head, using suitable tool. Standard: 34.000-34.016 mm (1.3386-1.3392 in) Calculation of Valve Lifter Clearance (Valve lifter clearance) = (valve lifter hole diameter) - (valve lifter diameter) Standard: 0.013-0.039 mm (0.0005-0.0015 in)
2. If the measurement is not within specification, referring to each specification of the valve lifter diameter and hole diameter, replace either or both the valve lifter and cylinder head.

Scheme 185

Scheme 186

Scheme 187

Scheme 188

Scheme 189

Scheme 190

Scheme 191

Scheme 192

Scheme 193

Scheme 194

Scheme 195

Scheme 196

Scheme 197

Scheme 198

1. Install the valve lifters if removed. Install removed parts in their original locations.
2. Install the camshafts. Refer to the (Scheme 185) for identification of the right and left bank, and intake and exhaust. Install so that the dowel pin at the front of the camshaft face is in the direction (Scheme 187)
3. Install the camshaft brackets. Install by referring to the installation location mark on the upper surface. Install so that the installation location mark can be correctly read when viewed from the intake manifold side. Install No. 1 camshaft bracket using the following procedure: Apply liquid gasket to No. 1 camshaft bracket (Scheme 189) Use Genuine RTV Silicone Sealant or equivalent. Refer to «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-233237-S23907478682006052500000). CAUTION: After installation, be sure to wipe off any excessive liquid gasket leaking from part "A" and "B" (both on right and left sides). Remove completely any excess of liquid gasket inside bracket. Apply liquid gasket to the back side of the front cover (Scheme 190) Use Genuine RTV Silicone Sealant or equivalent. Refer to «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-233237-S23907478682006052500000). Position No. 1 camshaft bracket close to the mounting position, and then install it to prevent from touching liquid gasket applied to each surface. Temporarily tighten the front cover bolts (4 for each bank) (Scheme 192)
4. Tighten the camshaft bracket bolts as follows: Camshaft bracket bolts Step 1 (bolts 9 - 12): 2.0 N.m (0.2 kg-m, 17 in-lb) Step 2 (bolts 1-8): 2.0 N.m (0.2 kg-m, 17 in-lb) Step 3 (all bolts): 5.9 N.m (0.6 kg-m, 52 in-lb) Step 4 (all bolts): 10.4 N.m (1.1 kg-m, 92 in-lb) CAUTION: After tightening the camshaft bracket bolts, be sure to wipe off excessive liquid gasket from the parts listed below. Mating surface of rocker cover Mating surface of front cover Tighten the front cover bolts (4 for each bank) (Scheme 194)to the specified torque. Front cover bolts: 11.0 N.m (1.1 kg-m, 8 ft-lb)
5. Install the camshaft sprockets using the following procedure: Install the camshaft sprockets aligning them with the matching marks painted on the timing chain when removed. Align the camshaft sprocket key groove with the dowel pin on the camshaft front edge at the same time. Then temporarily tighten bolts. Install the intake and exhaust side camshaft sprockets by selectively using the groove of the dowel pin according to the bank. (Common part used for both banks.) Lock the hexagonal part of the camshaft in the same way as for removal, and tighten the bolts. Check again that the timing mating mark on the timing chain and on each sprocket are aligned.
6. Install the chain tensioner using the following procedure: NOTE: Left bank is shown. Install the chain tensioner. Compress the plunger and hold it using a stopper pin when installing. Loosen the slack guide side timing chain by rotating the camshaft hexagonal part if mounting space is small. Chain tensioner bolts: 6.9 N.m (0.70 kg-m, 61 in-lb) Remove the stopper pin and release the plunger, and then apply tension to the timing chain. Install the chain tensioner cover onto the front cover (RH bank). Apply liquid gasket (Scheme 198) Use Genuine RTV Silicone Sealant or equivalent. Refer to «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-233237-S23907478682006052500000) Tensioner cover bolts: 9.0 N.m (0.92 kg-m, 80 in-lb)
7. Check and adjust valve clearances. Refer to «VALVE CLEARANCE»(ref-233240-S08124944862006052500000).
8. Installation of the remaining components is in the reverse order of removal.