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Old 07-29-2010, 10:11 AM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 20,490
Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by bluebee View Post
I'll update this with your input for as long as it will let me.
It won't let me update the original post of technonyms anymore so I'll start this post and update it until it won't let me. The goal is to incorporate every BMW E39 tecnnym (glossary, acronyms, definitions, terms, abbreviations, slang, terms, etc.) used in the boards that are technical in nature.

Add:
BFH = Big Fine Hammer (often needed to remove the BMW E39 32mm viscous fan nut)
BCM = Body Control Module (see also GMIII/General Module III)
CABs = control arm bushings (which often leak), see also CAB & FCABs
centerbore = the hole in the center of the metal wheel
CPO = Certified (by BMW) Previously Owned ($2,500 warranty + $500 inspection)
CSB = center shaft bushing or center support bushing (part of the BMW driveshaft)
Diverter valve = allows air into exhaust manifold on cold startup for emissions (see also SAP valve)
FCABs = front control arm bushings (which often leak), see also CAB & CABs
FDM = Fan delete modification
Flex disc = see giubo
Friction ring = Bentley provides brake rotor thickness per disc(i.e., per friction ring) in the vented two-disc rotors
GB = glove box, glove compartment, small drawer on the dash
Guibo = common misspelling of giubo
Giubo = flexible vibration damping disc coupling to reduce driveline vibration (aka "flex disc")
HF = Harbor Freight Tools (a source of inexpensive tools for E39 DIY projects)
Kennzeichen prüfen = Check the license plate light (text of cluster display)
KTMP = Kühlmittel Temperatur, aka Cooling Agent Temperature
OFH = Oil filter housing (the OFH gasket often leaks)
O-ring specification = 7.0x2.5 is 7mm ID & 2.5mm thick; 91x4 is 91 mm ID & 4mm thick
Pending DTC = DTC codes that are detected once, and do not appear all the time
PIA = Pain in the derriere (see also PITA)
PITA = pain in the derriere (see also PIA)
PPI = pre-purchase inspection by a qualified mechanic
PSP = power steering pump
SAP = secondary air pump (see also SAS)
SAP valve = diverter valve (see also SAS)
SAS = secondary air system as in S.A.S Pierburg Air Pump
Stratification adjuster = the center vent wheel with the 1,2,3 blue & red dots
VCG = Valve cover gasket (often leaks due to CCV clogging)

Additionally, these are confusing terms bandied about with respect to the E39 control arms and thrust arms:

Confusing definitions for the E39 thrust arms and control arms:

- thrust arm (longer than control arm, curved, hydraulic bushing)
- control arm (shorter than thrust arm, straight, solid rubber bushing)
...
- wishbone (i.e., the leading control arm on the V8, straight, shorter, solid bushing)
- wishbone (i.e., the trailing control arm on the I6, straight, shorter, solid bushing)
...
- traction strut (i.e., the curved thrust arm on the V8)
- tension strut (i.e., the curved thrust arm on the I6)
...
- upper control arm (i.e., the curved thrust arm, longer, rises higher to the frame)
- lower control arm (i.e., the straight control arm, shorter, rises lower to the frame)
...
- leading control arm (i.e., the curved thrust arm on the I6)
- leading control arm (i.e., the straight control arm on the V8)
...
- trailing control arm (i.e., the straight control arm on the I6)
- trailing control arm (i.e., the curved thrust arm on the V8)
...
Also:
- HD bushing (i.e., heavy duty, aka "solid" bushing)

Notice each front suspension arm has FOUR different names, some of which are unique while others overlap:
E39 I6 front suspension arms:
- Thrust arm (common name) = tension strut (BMW name) = leading control arm = upper control arm
- Control arm (common name) = wishbone (BMW name) = trailing control arm = lower control arm

E39 V8 front suspension arms:
- Thrust arm (common name) = traction strut (BMW name) = trailing control arm = upper control arm
- Control arm (common name) = wishbone (BMW name) = leading control arm = lower control arm




Last edited by bluebee; 09-23-2010 at 09:33 PM.
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