Volvo DL 1981 Owner Manual

I Engine Mechanical Components, Page 69 of 127 pages for Volvo DL 1981 Owner Manual. The Owner Manual is applied into the following products: GL 1981, GT 1981

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1981 Volvo DL, GL and GLT fittings. Drive belts The belt tension can be checked by depressing the fan belt at a point midway between the alternator and fan pulleys as illustrated. It should be possible to press down the belt about 1/4" - 3/8" (5-10 mm). This also applies to other drive belts on the engine. pg. 54 Servicing I Engine Mechanical Components Torque manifold nuts The manifold nuts should be torqued at the 600-1,200 mile (1,000-2,000 km) inspection. A loose manifold could alter air/fuel ratio and cause an increase in emission and/or poor driveability. Valves The valve clearance should be checked every 30,000 miles (50,000 km). Vacuum fittings, hoses and connections Unstable idle, misfiring or poor emission control is often caused by leaking vacuum hoses or connections. Check hoses and connections on distributor vacuum unit, EGR valve (where applicable) and connections on heater control servo systems and hydraulic brake servo. Camshaft drive belt The camshaft drive belt tensioner should be adjusted at the 600-1,200 mile inspection. An incorrectly tensioned drive belt will impair exhaust emission as the valves will open and close incorrectly. file:///K|/ownersdocs/1981/81_dl_gl_glt/81DLGLGLT_03a.htm (12 of 18)12/22/2006 10:28:38 PM

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