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Setting up an emergency release cable for when the hood release cable fails:

Hood release failure

(w/pix + pic of emergency cable for trunk release)

Opening the trunk after the release cable fails:

Help, I can't get into the trunk

(w/pix)

Installing an emergency trunk release cable:

Clickme

(w/pix)
 
Pictures and description of the not often discussed (or even known about in some cases) thermostat bypass valve ~ restrictor valve that's located in the hose that goes from the bottom of the manifold at the T-stat end down to the water pump.

Orientation is with the small hole shown in 2nd pic toward the T-stat.

Valve opens due to coolant flow pressure when T-stat is closed to recycle it through the water pump and directly back into the engine for faster warmup. When T-stat opens, the relief of pressure cause the valve to close and restrict the majority of coolant flow so it goes through the T-stat instead, and thus through the radiator for cooling.

Outright removal of the valve on engines so equipped can cause overheating issues as too large a %~age of the coolant recycles through the wide open hose to the water pump and right back into the engine instead of going through the radiator to cool.

This is the alternate system used in place of the type of T-stat that has the disc on the bottom to restrict recirculation flow when it opens.

Pics of the actual valve itself as supplied by BattleBug a couple years back:

Image

Image



More pix added as supplied by Pat Garrett
 

Attachments

Pic showing the common location of the warning buzzers, or chimes if you prefer, for the seatbelt and 'key in ignition with door ajar'.

They are the two small white or gray rectangular boxes on the side of the steering column support plate.

Sorry, I don't know who originally posted the pic, but thank you for sharing just the same.

Image
 
Series 3 fuel tank sending unit wiring (pic curtesy of jclark) :

White w/black trace is low fuel light
Pink w/white trace is pump power
Purple is fuel amount
Black is pump ground
 

Attachments

Installing a starter relay

Two versions that will get the job done.

87 to starter solinoid blade connection (disconnect ignition switch wire)
86 to ignition switch wire that was disconnected from solinoid
85 chassis ground
30 12 Volt power: main battery cable at starter

87 to starter solinoid blade connection (disconnect ignition switch wire)
86 chassis ground
85 to ignition switch wire that was disconnected from solinoid
30 12 Volt power: main battery cable at starter

A relay of 30 amp capacity is satisfactory, and if a fuse is used, it should be 30 amps or less and installed in the #30 terminal wire.

Bosch relay p# 0 332 019 150 is a suitable 30amp relay that has the molded on tab on the body for mounting.
 
Vacuum ~ plenum nipples

Post by BattleBug w/pix, descriptors and dimensions of the vacuum nipples found on the intake plenum of the S3 L-Jet spiders. S4 Motronic are likely the same or simular.

Top to bottom nipple I.D. (at threaded end, not the end that hose plugs onto) and what it services:

1.9mm goes to fuel pressure regulator
1.4mm goes to oil vapor seperator
3.0mm or 3.1mm goes to charcoal canister in area behind right fender wheelwell panel (interchangable w/nipple at rear of plenum for vacuum sensor)
 
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