Michael Benno

I put together this index of Porsche Technical Reference documents and I thought it might be useful for others. Someone gave me the source index and I added URL locations where the PDF versions of the documents can be found online. I have a preview below but there is more data in the link. If you have more reference information to include reply to this thread or shoot me a message and I'll update the master index. If you would like to help me manage the index I'll add you as an admin. Suggestions appreciated.

928 Technical Reference Index

(the information below if just for display purposes. please use the linked index above for more details. WKD 458 221 - 1978 Service InformationWKD 458 221 - 1978 Service Information

WKD 4?? ??? - 1979 Service Information

WKD 4?? ??? - 1980 Service Information

WKD 450 221 - 1981 Service Information

WKD 450 521 - 1982 Service Information

WKD ??? ??? - 1983 Service Information

WKD ??? ??? - 1984 Service Information

WKD 491 720 - 1985 Service 928S USA

WKD 491 620 - 1985 Service 928S ROW Information

WKD 491 820 / 821 - 1985 928S Servicing, Assembling, and Adjusting

WKD 492 420 - 1986 Service Information

WKD 493 120 - 928 S4 Modifications, Data, Settings, Wiring Diagrams '87 Information Technik

WKD 493 421 - 1987 Service Information

WKD 494 421 - 1988 Service Information

WKD 495 521 - 1989 Service Information 1989 S4

WKD 495 821 - 928 S4 Diagnosis of Instrument Cluster '89 Information Technik

WKD 495 921 - 1989GT Service Information 1989 GT

WKD 496 521 - 1990 Service Information S4/GT

WKD 496 921 - 1991 Service Information S4/GT

WKD 497 821 - 1992 Service Information

WKD 498 221 - 1993 Service Information

WKD 498 921 - 1994 Service Information

PNA 000-018-0 - 1985 - 1998 Service Information Index

WKD 459 521 - Air Flow Controlled Fuel Injection

WKD 454 921 - Test Plan EZF Ignition and LH-Jetronic Injection '85

WKD 491 120 - Test Plan EZF-Ignition and LH-Jetronic Injection 84/85/86

WKD 493 921 - Test Plan EZK and LH '87

WKD 494 521 - Diagnosis DME and LH-EZK with Tester 9268 '88

WKS 200 020 - Electronic Ignition and Injection System

WKS 107 121 - Test Plan EZK and LH '91

#1 987 722 160 97/98 EDITION - Bosch Gasoline Fuel-Injection System L-Jetronic

- Bosch K-Jetronic Troubleshooting Guide

- Workshop Manual K-Jetronic

WKD 104-030 - Basic Features of DME

WKD 107-021 - P 210005 Fuel and Ignition System S4 and GT

WKD 455 020 - Heating Ventilating Air-Conditioning System Information Technik P80

W42 600 4080 - Climate Control System M563

WKS 800 021 - P 800005 Air Conditioning Systems

WKD 490 521 - A28 Automatic Transmission Description of Operation

WKS 302 021 - Manual Transmissions for Eight Cylinder Model Series

WKD P31 - Repairs to Valve Body Automatic Transmission A22

WKD 490 621 - Troubleshooting Guide Automatic Transmission A28

WKD 4568.21 - A22 Transmission Description of Operation

WKD 469.21 - A22 Transmission Troubleshooting

- Body Dimensions & Lit Guide (1978 on)

WKS 504-021 - Diagnosing Body Damage 928S4

- Damage Diagnosis 928 Service Training

WKD 494 921 - Repair Jobs On Aluminum Body Parts

WKD 4563.20 - Welding Galvanized Sheet Metal

WKD 458 720 - Repairing Damaged Paint Finish on Cars

WKD 426094411 - Two Coat Metallic Paint Repair Procedures

WKD 4226-20 - Tech Spec (Dimensions and Tolerances) '78-80

WKD 422-920 - Tech Spec (Dimensions and Tolerances) '80-84

WKD 423-220 - Technical Specifications '85-89

- Technical Specifications '90-93

WKD 493 721 - Test Plan ABS 944, 928S, S4

WKD 490 821 - ABS TROUBLESHOOTING PROGRAM

PNA 000042 - ABS Test Procedure (using Tester)

WKD 492 121 - Service Anti-locking brake system ABS

P90 (6/86?) - 928S Electrical Troubleshooting & Repair

- 928 S4/GTS System Diagnosis Service Information for 9288 System Tester

PNA 000-056 - Tech. Bulletins prior to Nov '84, Book A (1976-1995)

- Technical Bulletins prior to 1984

- Tech Bulletins 11/84-1993

- Campaigns 1/85-12/91

- Technical Bulletin 78-03

- Technical Bulletin 8706

WKD 497 121 - Airbag System

WKD 493 621 - Airbag Information

WKD 4583.21 - 928 Maintenance Repairs Adjustments

WKS 108 021 - P 21000 5 Oxygen Sensor and Catalytic Converter

WKS 402 021 - P 400005 Running Gear

WKD P40 - Wheel Alignment Information

WKS 005 021 - 928S Vehicle Description

- Porsche Special Tools Catalog

WKD 4567.20 - Porsche 928 Electric Training

WKD 481 621 - WSM Manual Volume 1

WKD 481 621 - WSM Manual Volume 1A

WKD 481 621 - WSM Manual Volume 2

WKD 481 621 - WSM Manual Volume 3

WKD 481 621 - WSM Manual Volume 4

WKD 481 621 - WSM Manual Volume 5

WKD 481 621 - WSM Manual Volume 6

WKD 481 621 - WSM Manual Volume 7


11-01-2023
Added some new files today to the 928 Technical Reference Index

• WSM Manuals 1 through 7 Consolidated created by @Rob Edwards
• Owner's Manual Directory

Also, here is the master directory of all the 928 related documents beyond the technical references. This originated as a zip drive provided to me by another list member. I uploaded it to Google Drive for my personal use and shared it publically so we can all benefit. Just be aware the files in there are loosely organized and there may be duplicates or stuff that is not categorized well. I have been picking away at organizing the info as I go.

More items are being added all the time click the link for the most up to date info: 928 Technical Reference Index

harveyf

Fantastic effort Michael!
You are lucky in a way, since a lot of documentation from the 928 era was originally print material and is public domain at this point. I have been trying to track down documentation for my 987.1 Cayman and of course much of that is digital and protected.
I see the titles, which are general in nature. Do you remember anything that goes into the design of the lubrication system?

Tom. M

Great work Benno!
Do you think the 928OC might be a place where it can be hosted too? (multiple locations should one go down)?

Rob Edwards

The engine sections of the 1978 and 1979 service info guides have the most complete sections on the engine lubrication circuit and design .

1. WKD 458 221 1978 Service Information
2. (unknown) 1979 Service Information

olmann

Wow, very nice! Thanks

M. Requin

Michael, great job! This is a terrific undertaking, and thanks for sharing it with us.

Babado

Fantastic!
Thank you Michael.

linderpat

great material, thanks for pulling this together. It needs to be a sticky

Tom928s4sport

I came here to say this.

Smitje 928

Thanks a lot for putting this together Michael !!!!

drscottsmith

Awesome!

Thank you!

Michael Benno

Thanks for the nice comments. I'll be adding to this list and updating the thread as I find more docs in my files. I'll update this thread as I add documents.

Tom, sure we can put these files in 928OC as well. These files are all hosted currently in a Google Drive directory which is a cloud-hosted solution. The storage needs for all these files require about 10GB which I pay for.

hacker-pschorr

Holy cow, that's incredible!!! I've been collecting these documents as I find them for as long as I've been into 928's. I always thought it would be cool to complete the set but now I don't have to! Thank you

I concur

If we ever get around to updating the FAQ this could be the first section.

Michael Benno

Added WSM links to the 928 Technical Reference Index.

WSM Manual Volume 1
WSM Manual Volume 1A
WSM Manual Volume 2
WSM Manual Volume 3
WSM Manual Volume 4
WSM Manual Volume 5
WSM Manual Volume 6
WSM Manual Volume 7

I have a ton of Mercedes Technical reference information for the 3 and 4-speed automatic transmissions. I will give some thought to how to best add those. Maybe a separate tab on that google sheet.

khalloudy

Michael,

Some of the links lead to a wrong file and some are unreachable. You might want to check the repository for the correct links.