Technical Specifications

1st edition Status as per 8 1992 Important conversion factors and new dimensioning units 7 Survey of type Engine number codes as of Model 90 10 Engine type Chassis number Transmission number codes as of Model 90 14 Transmission type Transmission number codes as of Model 92 15 Transmission type Engine data 928 Engine data 928 Technical data type 928 Torque specifications - engine 20 Tolerances and wear limits - engine 24 Crankshaft - normal and reconditioning dimensions 28 Tightening sequence -...

Transmission number codes as of Model

Transmission Index for variants Serial number 2 ZF limited slip differential (M 220) 3 controlled limited slip differential (PSD) Caution The transmission nos. 1 2000 of each type are reserved for testing. The first serial number is 2001. Transmission G 28 57 manufactured as of model year 1992 as the 46th standard transmission (with controlled limited slip differential PSD).

Tightening torque

30 Nm 22 ftib 55 Nm 41 ftib 75 5 Nm 55 4 ftlb 20 Nm 15 ftib 50 5 Nm 37 4 ftlb Measure at approx. 62 mm from piston crown, offset 90 degr. from piston pin axis Measure at approx. 62 mm from upper edge of cylinder bore, transverse to cylinder block Note To perform measurement fit lower section of crankcase and tighten to prescribed torque. Repair stage Piston dia. mm Kolben-schmidt 1st oversize 100.480 100.500 1 0 100.490 0.007 100.510 0.005 1 1 100.500 100.520 1 2 Before machining cylinders it...

Tightening torque Nmftlb

8 2 6 1 20 2 15 1 40 5 29 4 Engine type M 28.42 47 49 50 When installed Wear new limit Cap for cooling system Pressure relief valve Vacuum valve opens at overpr. 0.9 1.15 bar closes at underpr. 0.07 0.12bar 7.51 1.51 0.080 0.120 0.060 0.088 Engine type M 28.42 47 49 50 When installed Wear new limit Bore for bucket tappet Inner diameter Engine type M 28.42 47 49 50 When installed Wear Groove 1 0.20 0.40 Groove 2 0.20 0.40 Groove 3 0.40 0.90 Engine type M 28.42 47 49 50 When installed Wear new...

Collapsible spare tire

Front and rear only permitted at front 2.5 bar overpressure 3.0 bar overpressure 2.5 bar overpressure 2.5 bar overpressure 2.5 bar overpressure 2.2 bar overpressure 2.5 bar overpressure 3.0 bar overpressure 2.5 bar overpressure 3.0 bar overpressure wit8 PR 89 P 92 P tires with 4 PR 83 P tires For V and ZR tires, amended standards and regulations require tire pressures which deviate from those given in the Driver's Manual. The new tire inflation pressures quoted above must now be used....

Piston weight tolerances

Pistons and piston pins are paired in accordance with weight selection. Pistons are weighed with their pertinent parts piston pins, piston rings, snap rings . Piston pins must always remain assigned to the corresponding piston and must not be interchanged even within one engine set. Observe allocation during disassembly and assembly of engine, and mark if necessary. If piston pins have been interchanged by mistake, reallocation must be carried out by checking the total weights. Identification...

Adjusting tension of polyrib belt for alternator

9.2 scale units 8.4 0.8 scale units Coolant mixing table average values Frost protection Antifreeze Water Antifreeze Water to Cleaning the Complete Engine Oil System Following Engine Failure Bearing Failure This cleaning sequence merely indicates where chips may be found. The actual amount of work involved must be determined separately for each individual case. The following parts should be replaced The following parts should be dismantled, checked and thoroughly cleaned - Oil restraining valve...

Pressure plate

Warm water heater with heat exchanger and fan LH-Jetronic 2 electric pumps 95 Contactless, via EZK 1-3-7-2-6-5-4-8 Via EZK Bosch WR 7 DC 0.7 0.1 Front-mounted engine, bolted together by a connecting tube to form a rigid drive unit - transaxle. Front engine, clutch, torsionally elastic drive shaft to transmission mounted in connecting tube, rear transmission interlocked with axle drive, twin drive shafts to rear wheels Single-disk dry clutch with diaphragm spring, extended version, located at...

Tightening specifications for cylinder head

When fitting the hex. head bolts and washers, no lubricant must be used. Only the threads of the hex. head bolts must be lightly coated with engine oil. Right camshaft Cylinder bank 1 4 Intake shaft Exhaust shaft Left camshaft Cylinder bank5 8 Intake shaft Exhaust shaft Intake opens Intake closes Exhaust opens Exhaust closes Worldwide Worldwide as of Model 90 as of Model 92 11 CA after TDC 3' CA after TDC 13 CA after TDC 36 CA after BDC 42 CA after BDC 61 CA after BDC 17 CA before BDC 30 CA...

To convert tightening torques from kpm into Nm the conversion factor 10 can be used This is sufficient for workshop

1990 928 S4 Europe, RoW A M28 42 4957 235 320 78.9 100 10.0 1 928 GT Europe, RoW M28 47 4957 243 330 78.9 100 10.0 1 928 S4 USA, Canada AM28 42 4957 235 320 78.9 100 10.0 1 928 GT USA, Canada M28 47 4957 243 330 78.9 100 10.0 1 1991 92 S4 Europe, RoW A 10.0 1 1992 928 GTS Europe, RoW M28 49 5397 257 350 85.9 100 10.4 1 928 GTS Europe, RoW AM28 50 5397 257 350 85.9 100 10.4 1 1993 928 GTS USA, Canada M28 49 5397 257 350 85.9 100 10.4 1 928 GTS USA, Canada AM28 50 5397 257 350 85.9 100 10.4 1 928...