Say goodbye to rear end clunks! With the
introduction of the Rogue Engineering Rear Shock Mounts, you have a
high quality, rebuildable, easily serviceable rear shock
mount.
Fits the following
vehicles:
-
All E30
-
All E36, Z3 and 318ti
-
All E46, excluding
convertible
-
All Z4
Rogue Engineering Rear Shock Mount Set
includes:
-
Two (2) Rogue Engineering 6061-T6 CNC, Anodized Rear Shock
Mounts
-
Four (4) Shore A 65 Bushings (2 required per
mount)
-
Two (2) 303 Stainless Steel Bushing Spacers (to be used
with standard 10mm rear shocks)
-
Four (4) 303 Stainless Steel Washers (2 required per
mount)
-
Four (4) Yellow Zinc plated serrated lock
nuts
-
Two (2) Shock Tower Reinforcement Assemblies (with 10.9
hardware welded)
-
Two (2) factory gaskets
(#33-52-1-128-734)
Problems with Factory Mounts
The factory BMW rear shock mounts are
generally a little soft, to provide the most possible acoustically
dampening in the vehicle. However, design precludes them from being
stout enough to withstand the rigors of aftermarket suspension, or
even badly damaged roads. A decent sized pothole can send a
perfectly good factory rear shock mount to pop out, making it
entirely useless necessitating replacement. Upgrading to E46 M3
rear mounts (a popular alternative) is not a guarantee that it
doesn't happen again and again.
Because of poor design and extensive abuse, stock
BMW rear shock mounts often fail with the inner metal sleeve
separating from the rubber bushing. Usually, this manifests itself
as squeaking, rattling, clunking and deflection of the
rear shock mount, leading to poor suspension performance and a
great deal of annoyance. Replacing the RSM's with OEM units
provides temporary relief, but invariably they fail again, usually
in 20K miles or so, but often MUCH less when aftermarket high
performance shocks are used.
Rogue
Engineering Rear Shock Mount Features
By producing a rear shock machined from 6061-T6 aluminum, we are
able attain a more stable, and stiffer platform which to mount the
top of the rear shock. However, rather than use race-only spherical
bearings or even overly stiff urethane bushings, we specify Shore A
65 hardness rubber bushings (approximately 30% stiffer than the
factory bushings) to allow for some level of street comfort. The
orientation of the bushings makes it impossible for the bushings to
"pop out" in the manner which the factory mounts fail. If required,
the bushings are also replaceable, when the time comes to rebuild
them.
Other important details include the use of 303
stainless steel components (compressions washers and spacers) for
long-lasting corrosion resistance. All other hardware is either
Grade 8 or better, treated with a yellow zinc plate, again for
corrosion resistance.
Protection and Quick Installation/Removal
Another feature is the
reinforcement assembly which secures the rear shock mount to the
vehicle. By reinforcing the top of the shock tower in the vehicle,
it protect against the rear shock from ripping out the sheet
metal.
Additionally, the reinforcement has its hardware
welded to it, allowing for the rear shock mount to become a
bottom-mount design. This means that if the rear shocks need to be
removed, it only requires removing the two nuts and the single bolt
at the bottom of the shock. Once installed, there is no need to completely disassemble the
trunk area to gain access. If being used with a rear strut
tower brace, the reinforcement assembly may be mounted from the
bottom, so that the rear shock mount can be secured in the
traditional manner.
The Rogue Engineering Rear Shock Mounts are
designed to be used with standard 10mm rear shocks, but can also be
used with 12mm adjustable race shocks with the use of optional
washers.
*Shock mounts modified for convertible 3 Series cars
have the reinforcement plate cut to fit in the confined area
resulting from the soft top design. Z3 convertible cars will take
the standard stock mount design.
