Everything you need to know about the early Porsche 928.
Browse here for technical information and helpful resources.

Fuse & relay quick-reference chart, 78-79

The Porsche owner’s manual fuse and relay documentation lacks information and is difficult to cross-reference.  Use this 78-79 Porsche 928 fuse & relay chart for quick reference, with additional info like relay part numbers and fuse amp color keys.  Also,…

Engine oil capacity and dipsticks, 78-84

The following guide is the result of research used to answer an important question; what is the correct engine oil capacity for an early 928?  Seemingly simple question, however the answer was surprisingly more complex. See, from 1978 to 1983,…

Bosch K-Jetronic CIS fuel tuning procedure

The Porsche 928 continuous injection system is very robust when properly set up.  However, it requires clean fuel and pressures set to the correct specifications. This 6 page procedure is designed to guide you through setting a baseline fuel tune on…

HVAC vacuum climate control, 78-79

The early 928 vacuum-actuated climate control system can be complicated to understand. I found that the schematics from the 1978 Service Info Manual (pgs 130-131) were inaccurate and lacking clarity, which led to unnecessary confusion.Here, you’ll find a revised schematic…

Porsche 928 spare parts catalog, 77-80

This is the original Spare Parts Catalog, before microfiche & PET! First published in January 1977, this edition is from January 1980.  The parts diagrams are outstanding!  Also, you will find early option codes and part numbers (before later supersession). …

Aluminum ball joint replacement, 78-84

As specified in Technical Bulletin TB 84-01, early 928s were fitted with aluminum lower ball-joints which should be upgraded to steel replacements.  This is an important upgrade because the aluminum LBJ’s will fatigue and fail. I’m shocked at how many…

Technical specification booklets, 78-84

The 78-80 and 80-84 Porsche 928 tech spec booklets are useful for quick-reference technical information such as: model info vin decode engine/trans designations dimensions/weights tolerances filling capacities fuse/relay chart Also useful for mechanics as a supplement to the factory workshop manuals.Click image to view PDFClick image to view…

Light bulb chart, 78-86

Here’s a comprehensive light bulb chart with types, specs, and where they’re used on the Porsche 928, from 78 thru 86. Also, both Osram-Sylvania and Porsche P/N’s are listed for easy cross-reference to help with selecting the correct bulb for…

Porsche 928 VIN decoder, 78-80

For model/years 78, 79 and 80, the Vehicle Identification Number (VIN) is unique, when for only those 3 years a 10-digit VIN format was used.  From model/year 81-later, a new 17-digit VIN format was standardized per ISO 3833.  To get…

Serial numbers vs. production numbers, 77-78

This resource is designed to help understand the serial number of your early 928, and determine it’s production number.  First, there are a couple things you need to know:  United States/Canada (US) and Rest of World (RoW) vehicle identification numbers…

Radio manuals, Porsche CR

Porsche Cassette Radio CR Stereo Typ US and Typ DE operation manuals or Bedienungsanleitung. Published by Blaupunkt in 1977.  English, French, Spanish and German languages. Original equipment for the Porsche 928, 930 Turbo, and 911 Carrera. Like the Blaupunkt ‘Blue Dot’ Bamberg and…

Service information manuals, 78-79

The 1978 and 1979 Porsche 928 service information manuals contain highly detailed information, diagrams and schematics. From engine to transmission, power steering to suspension, headlights, climate control, central warning and electrics. This is one of the best technical introductions to the early…

Paint & interior color charts, 78-79

Late 70’s Porsche 928 paint and interior options were fantastic!  Vibrant single-stage solid colors like Continental Orange or Talbot Yellow were available, and a broader range of metallics like Minerva Blue or Tobacco Brown began to popularize. And fabrics such…

Porsche 928 press kit, 1977

Porsche’s marketing department published this 1977 Press Kit to introduce automotive journalists and the general public to the then-new Porsche 928. It’s chocked full of fundamental information, including tech specs, overall dimensions and high-quality black & white photos. This is a great…

Porsche 928 owner's manuals, 78-82

Most of these owner’s manuals are English language for the US/Canada market. However, there’s one German language Betriebgsanleitung for 1978. If you have a RoW ‘Euro’ 928 and need English language, look for a Driver’s Manual published for the UK market. Credit…

Early and late camshaft o-ring seals

As specified in Technical Bulletin TB 78-03, a change occurred in 1979 when an o-ring groove was removed from the camshaft and added to the camshaft sleeve bearing. A larger o-ring was required. Specified in TB 78-03:Early o-ring P/N 99970145240, size…