Although the average Porsche today may cost as much as a small house, there was a time when Porsche attempted to return to its Volkswagen roots by offering a bargain-priced sports car for the masses. The 928 and 944 were something of a departure for the company, which had added this pair of rear-drive, front-engine, four-cylinder rides as entry models to its signature rear-drive, flat-six line-up. The 928S shared its water-cooled 2.5-litre (151 cubic inch) inline-four with the 944 that would eventually come to replace it.
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Balance Shaft to Crankcase
Torque specs for 1982 to 1985 engines were 6 foot-pounds (ft-lbs) for the M6 bolts, 15ft-lbs for the M8 bolts and 22ft-lbs for the M8 nuts. For 1985 to 1986 cars: 24ft-lbs for the nuts, 7.5ft-lbs for the M6 bolt and M8 bolts. For 1987 to 1991: 24ft-lbs (bearing bridge to crankcase nuts) and 15ft-lbs for the M8 bolts.
Bracket/Stay to Crankcase
This is the bracket/console for the generator-to-engine, and specs to 33ft-lbs for all years
Camshaft and Head
Camshaft-bearing-to-cylinder-head bolts spec to 15ft-lbs for dual-cam engines of all years. On single-cam engines, the camshaft-to-camshaft-housing bolts spec to 6ft-lbs and the camshaft-housing-to-cylinder-head bolts torque to 15ft-lbs. Torque head bolts in three steps: first torque them all in sequence to 14.74ft-lbs, use an angle-torque gauge to turn them all a further 90 degrees in sequence and make a final pass to turn them a further 90 degrees in sequence. Torque the spark plugs to 20ft-lbs.
Torque the connecting rod bolts to 55ft-lbs if your rod-cap nuts are ribbed (which indicates a cast rod) and 42ft-lbs if the rod-cap nuts are smooth (which indicates sintered metal rods). Torque the upper-to-lower-crankcase M10 bolts to 37ft-lbs, the M6 bolts to 7.5ft-lbs, the M8 bolts to 15ft-lbs and the M12 bolts to 22ft-lbs. Use and angle-torque gauge to turn the M12 bolts a further 60 degrees after torquing them to 22ft-lbs.
Sensors and Plugs
Torque the sensor-holder to 15ft-lbs, crankshaft position sensor (CPS) to 6ft-lbs, the engine temperature sensor to radiator bolts to 15ft-lbs, the knock sensor(s) to 15ft-lbs, the oil pressure sensor to 26ft-lbs, the engine temperature sensor to crankcase to 26ft-lbs if you have a remote sensor and 11ft-lbs if you have a 1985 to 1989 DME-II sensor,
Torque the oil pump to crankcase bolts to 6ft-lbs, oil pump cover to oil pump housing bolts to 6ft-lbs, oil separator to crankcase bolts to 15ft-lbs, oil cooler housing bolts to 15ft-lbs, the oil pan bolts to 7.5ft-lbs, the oil pan baffle to 4.5ft-lbs (use blue threadlocker), the oil line to timing chain/belt tensioner (banjo fitting) to 7.5ft-lbs and the oil filter to 15ft-lbs.
Plugs and Ancilliaries
Torque the flywheel bolts to 66ft-lbs, the oil drain plug to 37ft-lbs, the camshaft housing plug to 29.5ft-lbs and the oil cooler housing plugs to 26ft-lbs. The valve cover bolts should not exceed 7.5ft-lbs.
Tighten the belt cover bolts to 6ft-lbs, the timing chain/belt pulley to oil pump, water pump and crankcase bolts to 33ft-lbs and the chain/belt pulley tensioner to 33ft-lbs as well. The tensioner to head bolts spec out to 7.5ft-lbs, and the tensioner to crankcase bolts to 15ft-lbs. Torque the timing chain/belt sprocket to 33ft-lbs on the camshaft, 155ft-lbs on the crankshaft, and 33ft-lbs on the balance shaft.
Put Loctite 270 on the water pump bolts and tighten them to 6ft-lbs. Tighten your water adaptors to 15ft-lbs regardless of location.
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