For clarity, when referring to '924' it will be to all the models and common sense and context will be your guide to applicability. (For example, if the discussion is about drum brakes it is assumed that the reader knows the 924S is not included). The 924 Turbo, or 931, may be specifically discussed. 924S references the ultimate expression of the automobile and is the 1986 to 1988 924 with the Porsche 2.5 liter engine installed. As a practical matter this site will not delve into the 2.5 engine in detail as it is adequately treated in detail under the 944 series.
The 924 Garage Technical Section follows the general outline of the Haynes Manual: Porsche 924 and Turbo, 1976 thru 1982. References are to Haynes figures or page/paragraph numbers in this manual unless otherwise specified. If you do not have the Haynes you should; $20 or less. And for the 931 get Haynes plus the Porsche factory 924 Turbo volume, WKD-481-721, $59.84.
924S requires you have the Haynes Porsche 944 1983 thru 1989 manual. Where references for the 924S are to this manual we will so state. Note that Haynes uses different chapter numbering in this manual than in the 924 manual. You will see that many of the pictures are out of the 924 manual! This manual does not have much on the transmission as Haynes decided it was not 'user repairable'.
Note: "Porsche 944 1983 thru 1989 Manual" has many errors re. engine dimensions on pgs 66 & 67. They converted metric to english wrong in several places, including bore and crank journal diameters. But, hey, its only off a few thousandths! So, do your own conversions or use metric micrometers. - Bob
The Parts And Technical Reference Catalog is very handy and inexpensive. Always use the current parts numbers from your source when ordering; but this manual is great to get started. And all the exploded views are great. Study this manual and you can learn a lot about what parts swaps can be made between years and models. PNA-001-147-A, $7.95.
Both the 924 and 931 saw significant change in 1981. The Service Information Model 81 manual is pretty much required for the 81/82 cars. Find out exactly how the control pressure reduction works, how to setup the throttle housing microswitches, ... WKD-450-021, $1.72. This manual is a BARGAIN!
Bulletins, factory manuals etc can be purchased from any parts source. Notably online try My-Porsche.com.
A website with bulletins: http://www.alldata.com/consumer/TSB/50/82501902.html
A general observation: every locking washer of any type removed from our 1980 and 1982 cars has been absolutely worthless. Now we replace all wave, split, star, what-have-you, without hesitation.
Haynes (page 10) shows excellent basic locations. The difficulty for the hobbyist is lifting the car and then putting stands under. Where to put both a jack and the stands?
At the rear lift the complete car underneath the transmission. Use a block of wood to protect the aluminum casting. A hockey puck is also an inexpensive form of protection for the body, and fits nicely into the saddle of full-size floor jacks.
Late style (Fig 7.1a) lift under the main casting (under the oil drain plug) and not just under the most rearward section of the transmission. Lift automatic transmission cars by the main casting in front of the drain pan.
Later cars place rear stands under the aluminum Mounting Flange (Fig. 10.5 num15). Early cars under the the extended portion of the Spring Strut (Fig. 10.6 num26). The torsion bar(s) carrier tube also is an excellent place. If, however, you are intending to remove the rear suspension use the basic locations or the round 'doughnut' on the underbody. Jackpads for the 944 can be used under the 'doughnuts', as well as hockey pucks.
The front can be lifted by the cross-member. Be sure not to slip off onto the oil pan. Then place stands under the longitudinal box sections shown in Haynes. When applicable to the job at hand the box section is a stiffer location and therefore preferable to using the forward doughnuts. Also, when lifting the car on a garage lift, if you use the boxes there is no danger at all of the front slipping such as might occur using locations at the edges.