Reference

Removing and refitting the cylinder head on the 8-valve 944 engine, with the factory tightening procedure — the torque-angle figures, the crosswise sequence, gasket preloading, and the lubrication rules. Torque figures switch between N·m and ft·lb.

Factory tightening torques for the 8-valve 944 engine — crankcase, balance shafts, cylinder head, camshaft, fuel and exhaust — plus key crankshaft and piston wear limits. Torque values switch between N·m and ft·lb.

Factory data for the 944's R12 air-conditioning system — the refrigerant charge, the compressor oil fill, the rupture-seal and coupling-power figures, and the compressor/condenser/line tightening torques — followed by a concise evacuate → flush → charge service overview with its vacuum and pressure targets. This is an R12 system, so handle the refrigerant only with proper recovery equipment. Pressures switch between bar and psi and torques between N·m and ft·lb.

Service data for the optional Bosch three-channel ABS (M593) fitted to the 944, 944 S and 944 Turbo — the system layout, the wheel-speed sensors and their fixed (non-adjustable) air gap, hydraulic-unit and relay service notes, the bleeding rule, and every ABS-specific tightening torque the factory states. The sensor air gap is a design feature and is not set on the car; bleeding follows the same procedure as a car without ABS.

Factory data for the 944's three-speed automatic transaxle — the Type 087 M / 087 N unit, its converter and final-drive ratios, the torque-converter and stall-speed figures, the ATF and final-drive fluid specifications and capacities (total fill versus the drain-and-refill change quantity), the tightening torques, and the ATF-and-filter service. Match the ratios to the code letter stamped on your transmission; USA/Japan figures are given in brackets.

Service and overhaul reference for the 944's three-speed automatic transaxle (Type 087 M / 087 N) — the torque-converter oil-seal renewal, the axial-play (end-float) adjustment between transmission and final drive with its measured shim table, removing and disassembling the valve body with its bolt torques and valve identification, the 2nd-gear-brake piston-rod distances, and governor service. A companion to the automatic-transmission data page; capture the measured clearances and torques here before you open the unit.

Factory body checking and alignment reference data for the 944 — the Celette straightening-bench attachment sets and take-up tolerances, the floor-plate/front-end control dimensions, and the extra checking dimensions that distinguish the Cabriolet from the coupe. All figures are in millimetres. This is a reference page; the full straightening procedure is out of scope.

Factory brake figures for the 944 — new and wear-limit thicknesses for the discs, pad thickness and wear limit, caliper piston sizes, the disc runout and thickness checks, and the hydraulic-system tightening torques. Torques switch between N·m and ft·lb; thicknesses are fixed dimensions in millimetres.

Factory removal-and-installation reference for the 944 front spoiler, front bumper and rear bumper — the fastener sizes, the impact-absorber layout and the alignment notes that matter when you refit them. The energy-absorbing (impact) bumpers fitted to USA and Canada cars are called out where they differ. Bolt sizes are metric thread designations and set dimensions are in millimetres, so nothing on this page switches between metric and imperial.

Factory relay layout for the 944's central electric system from the 1984 model year onward — what each numbered position on the main relay carrier does, where the additional relays live, and the Central Electrics Unit position codes (G-numbers) for the plug-on relays. Includes the factory correction to the 1987 wiring diagram sheet 10. This complements the fuse lists; for fuse assignments see the fuse references.

Factory cooling-system figures for the 944 — thermostat opening and fully-open temperatures with the water-bath bench check, the radiator-cap pressure-valve settings, and the leak check. Temperatures switch between °C and °F, pressures between bar and psi.

Factory service data for the 944's opening panels — how to align the front hood, doors and electric rear hatch by gap and flush, how the gas-strut supports mount, and how to set the electric hatch-release cable. The workshop manual treats these as body panels: alignment is set visually to even gaps, so this page captures the adjustment logic and the few fastening notes rather than a torque table the manual does not print.

Factory belt-tension gauge readings for the 8-valve 944 measured with the Porsche belt-tension tester (Special Tool 9201/9202): the poly-rib accessory drive belt, the toothed camshaft (timing) belt, and the toothed balance-shaft belt, plus how to calibrate the 9201. Every figure is a dimensionless scale reading — check tension only on a cold engine.

Factory data for the 944 exhaust system — the three flanged joints from the manifold back to the final muffler, the single M8 tightening torque that applies to every flange, and the factory method for replacing the exhaust pipe, primary muffler or catalytic converter by welding a sleeve into the pipe.

Factory service data for the 944's exterior lighting — greasing the concealed (pop-up) headlight linkage, removing and refitting the headlight beam-control actuators, checking the electric beam-control voltages, and aiming the main headlights to the factory beam-drop figures. The '88-on cars carry an in-cabin load-compensation switch; the aiming targets change with its position.

Factory setup data for the 944's rear-mounted final drive — the hypoid ring-and-pinion, its backlash and tapered-roller-bearing preload figures, the pinion setting (deviation 'r') that governs shim selection, the final-drive oil grade and level check, and the tightening torques. The manual Type 016 J/K unit and the automatic Type 087 N unit use different backlash and preload values, so read the column for the transaxle you have.

Factory tightening torques for the 944 front axle — control arm, cross member, steering knuckle, spring strut, stabiliser and wheel fasteners — plus the notes on the light-alloy control arms introduced for 1985/2. Torques switch between N·m and ft·lb.

Factory service data for the 944's bonded windshield and lifting sunroof — the three windshield-bonding systems (heated single-cartridge cement, Sekuriflex, and the two-pack adhesive), their bead sizes, primer and flash-off steps, curing conditions and installed glass gap, plus the interior-mirror bonding and the sunroof same-plane adjustment. Every dimension in millimetres is fixed as printed.

The 944's revised heating system introduced with the 85/2 model, the fresh-air blower removal and installation, and the fan-wheel tightening torque — plus the ambient-temperature-to-voltage calibration table for the controllable seat heating. Reference data drawn from the factory Workshop Manual; see the air-conditioning page for the shared heater/A-C unit.

Factory instrument-system service data for the 944 — how the economy (consumption) display and the upshift indicator work and which signals they need, removing and installing the instrument cluster, bench-checking the coolant-temperature, fuel-tank and oil-pressure gauges against the VAG 1301 test-unit tables, the burglar-alarm control-unit signals, and the cluster illumination-bulb wattages. USA-market notes are given in brackets.

Factory lubrication-system service data for the 944 — the oil and filter change figures, the tightening torques for the oil pump, relief valve, sensors and oil pan, and the pressure-relief valve service notes. All torques switch between N·m and ft·lb.

Factory data for the 944's five-speed manual transaxle — the driveline layout, the transmission-oil specification and capacity, and the gear and final-drive ratios for the Type 016 and Type 083 units. Match the ratios to the transmission type stamped on your gearbox; USA figures are given in brackets.

The factory oil-pressure figures for the 944 and the workshop gauge-test procedure — idle and 4000 rpm thresholds at operating temperature, plus oil quantity, consumption and the maximum oil temperature. Pressures switch between bar and psi, temperatures between °C and °F.

Factory tightening torques for the 944 rear axle and axle shaft — trailing-arm wheel-hub nut (steel and aluminium arms), axle shaft, brake backplate, caliper and wheel fasteners — plus the note on the standardised running-gear mount tuning from 1991. Torques switch between N·m and ft·lb.

The factory ride-level-height and rear spring-strut-angle figures for the 944, sorted by torsion-bar diameter, sport package (M030/M637/M031) and model year. These are the values you set before checking wheel alignment. USA and Canada figures are given in brackets; dimensions are millimetres and angles are degrees, so there is no metric/imperial toggle.

Safety-relevant interior service data for the 944: how to inspect the seat belts (function, condition and the tear-seam overload indicator on airbag cars), the front-seat removal-and-installation procedure with its synchronous seat-rail locking sequence, and the rear inertia-reel belt anchor tightening torques. The belt-anchor torques are safety-critical — treat them as exact.

Factory steering figures for the 944 — power-steering fluid type and delivery pressure, the fluid-level and bleeding rules, and the tightening torques for both manual and power steering. Torques switch between N·m and ft·lb and the delivery pressure between bar and psi; the rule-of-thumb fluid-level distance is a fixed dimension in millimetres.

Factory technical data for the 8-valve 944: engine, design, capacities, electrical system, dimensions, weights, and performance — with metric/imperial unit switching on temperatures, torque, pressure, speed, and weight.

Engine displacement, horsepower, torque, and performance figures for all 944, 944S, 944S2, 944 Turbo, and 968 model variants.

Factory self-diagnosis procedure for the 1985 944 Turbo KLR knock- and charging-pressure control unit — how to read the two-digit flash code with the P 9246 test adapter, and what each stored code (1–2 through 4–2) means, with the possible cause and the check or remedy.

The factory wheel-alignment figures for the 944 — front and rear toe, camber and caster with their tolerances, the measuring conditions, and the maximum left-to-right difference. USA and Canada figures are given in brackets. Alignment is specified as angles, so there is no metric/imperial toggle.

Technique for removing stubborn Allen head and cheesehead bolts from aluminum engine components on the Porsche 944, where steel bolt threads can bond to the aluminum over time.

A detailed pre-purchase inspection checklist for the 944 and 944 Turbo, covering underside inspection, engine running checks, and driving evaluation.

Instructions for fabricating a rear-seat camera bar for the Porsche 944 that mounts to the shoulder belt anchor points, suitable for track event video recording.

Clark Fletcher's 1986 944 Turbo project car: how he came to own it, the performance modifications completed, and future planned work.

Context and notes on Euro-specification (ROW) 944 models and their differences from US-market cars.

A curated list of performance parts vendors, repair and restoration parts suppliers, and specialty tool sources for the 944, 944 Turbo, and related Porsche models.

Reference table of Porsche-specified sealants for the 924, 944, and 968, with part numbers, product names, and their specific applications.

Ways to contribute to the Clark's Garage repair manual archive, including submitting feedback, photographs, and procedure write-ups.

How tyre pressure works — cold versus hot, the contact patch and grip, reading tread temperatures with a pyrometer, and setting pressures for street and track. Pressures switch between bar and psi, temperatures between °C and °F.

A historical directory of community-maintained websites covering the 944, 944 Turbo, 924, 928, and 968 — compiled by Clark Fletcher.

An overview of reference manuals and a list of special tools — with part numbers and suppliers — needed for DIY work on the 944 and 944 Turbo.