Quality ... the degree of excellence
800-451-7225
Porsche
924s - 944 - 951 - 968
Griffiths designs and supplies various Porsche air conditioning
components, such as ac, a/c, barrier hoses, clutches, compressors,
condensers, driers, expansion valves, evaporators, fan motors, R134a
refrigerant upgrades and updates, remanufactured Nippondenso, new Kuehl
and Sanden compressors, vents and more for Porsche 924s, 944, 951 and
968 models.
Compressors
OEM - Nippondenso Compressors
The early 944 (1983-1985.5) used the large swash-plate multi-piston
driven
Nippondenso having 6 mounting ears. The clutch pulley is a 5 groove
serpentine
(multi-rib). The compressor unit is similar to the 928 from 1980-1989,
only the clutch pulley is different. Griffiths stocks this early
compressor
with and without clutch in R12 and R134a configurations. Our re
manufacturing
details include: case,piston & bore and reed valve inspections,
bearing
replacement, quality seals and clutch overhaul. For a good alternative
to a re manufactured compressor see our Kuehl Kits below.
From 1985.5 through 1992 Porsche used a smaller swash-plate
multi-piston driven
Nippondenso having 4 mounting ears. This same unit is used on the 924s.
The clutch pulley is a 6 groove serpentine (multi-rib). These
compressors
work very well.... until the a/c system loses oil, at which point the
compressor
locks up (freezes or seizes). It may initially seem that the clutch is
locked up or the pulley's bearing is worn. Upon careful inspection is
quite
common to find the coil is burnt due to heat build up, the pulley
bearing
is worn as the grease melted out, or the pistons and cylinders are
scored.
Griffiths stocks this later model compressor with and without clutch in
R12 and R134a configurations. Our re manufacturing details include:
case,piston
& bore and reed valve inspections, bearing replacement, quality
seals
and clutch overhaul. If you are not committed to the OEM style Nippon a
better solution would be our Kuehl kit (below) as there is no
"core" charge. This is a NEW compressor (below) !
The NEW Kuehl (pronounced "cool")
Compressors
Griffiths offers an alternate solution compressor "kit" for your 924s,
944, 951 or 968. This
is our Kuehl (pronounced "cool") compressor kit. A picture of the Kuehl
attached to the 944 alternator/compressor bracket is featured on the
right (also fits 924s and 968). The Kuehl is simple to install as our
kit includes everything you'll need and it's R134a ready:
-
new Compressor & Clutch
-
mounting Hardware
-
new high pressure Hose Assembly
-
new Drier
-
new Belt
-
R134a charge port adapters
-
detailed Instructions with pictures
Click the Order Now button to get your Kuehl Compressor Kit !
The Kuehl is swash plate design offering smooth performance with R134a
refrigerant. Since the Kuehl is a "new" compressor you don't have to
worry
about core deposits. You would want to consider this product when
either:
(a) you are dissatisfied with the performance of your original
compressor,
or (b) your current compressor seized (there are no core deposits
involved
with our Kuehl units).
Condensers
944, 951, 968 Condensers
| Stock OEM |
Kuehl Super II |
 |
 |
 |
 |
| Stock Tube and Fin |
High Performance Kuehl
Serpentine |
Above on the left side is stock 944, 951, 968 "tube and fin" two row
construction condenser as found on 1985/2 + 944, 951 and 968. With this
stock tube and fin design, as air attempts to pass through a
tube and fin type coil air masses converge and deflect air away from
the tubing surface; note the large tear drop shaped "hot spots" (shown in red) on the trailing
edge of the round tube cross section.
Above on the right side is Kuehl Super II high performance condenser,
which is a direct drop in, bolt on, replacement for stock factory
condenser found on 85/2 944, 951 and 968 models. This new condenser
utilizes next generation "serpentine" tubing. The benefits of the Kuehl
Serpentine lay in the unique serpentine tube design which is found in
today's vehicles using R134a. Rather than using old fashion round
tubing with many braze joints the Kuehl Serpentine has one continuous
multi-channel extrusion to channel the flow of refrigerant. The fin
spacing is also greater. This design offers three advantages over the
old tube and fin design: (i) with the larger fin spacing a greater
volume and velocity of air moves across the condenser coil. (ii)
Serpentine (rectangular cross section tubing) develops small and fewer "hot spots" as opposed to tube and fin;
serpentine coils are more efficient and offer better performance. (iii)
The Kuehl Super II unit has only two braze joints rather than dozens as
found on tube and fin designs.
Click the Order Now button to get your Kuehl Super II Condenser!
Driers
The receiver drier is critical component to your a/c system. The
drier
is as important as your oil filter is to your engine. It consists of a
steel tank, a filter, desiccant bag (drying agent) and a top mounted
site
glass. Driers should be replaced whenever: (a) your system has lost
it's
refrigerant and the drier is the original unit, (b) the system is
suspect
to excessive moisture, (c) you are changing over to an alternate
refrigerant
or incompatible refrigerant oils, or (d) your compressor seized or
locked
up. The drier can be found typically attached to the inner front
driver's
side wheel well. Griffiths stocks driers for your 924s and 944 models.
Expansion Valves
The 924s and 944 uses an internally equalized expansion valve. The
Expansion
valve should be replaced when either, (i) diagnostics have confirmed
valve
failure or leakage, or (ii) your compressor seized or locked up.
Griffiths
stocks expansion valves for your 924 and 944.
Hose Line Assemblies
The a/c hose lines on the 924 and 944 were made of traditional hose
(rubber). This original type of hose was designed during the time
period
when R12 refrigerant was inexpensive and it's affect on the ozone level
was not known. This old fashion hose line slowly leaks (permeates)
refrigerant
through it's skin overtime. It was common to "top off" or recharge the
system on a yearly basis. Today, with the high cost of R12 it's not
wise
to have leaks of any kind. With the introduction of R134a refrigerant
the
a/c industry determined that the original type hose leaked R134a at a
greater
rate than R12. To solve the problem a new type of hose was designed
that
has inner liner which reduces rate of permeation (leakage) of
refrigerants
through the hose wall. It's called "barrier" hose. You should inspect
your
hose lines on a yearly basis, looking for cracks, signs of oil or dirt
accumulation on the hose or near the hose fittings. You may notice
small
pin size holes that are evenly spaced in a line running the length of
your
hoses. These are "pressure relief" holes which are installed by most
hose
manufacturers. The small holes allow pressure to escape in the event
that
the primary inner wall of the hose should fail under extreme pressure.
The designers contemplated that it would be better to avoid a sudden
eruption
in the outer wall that could harm the vehicle or a technician working
on
the car. Under normal peak operating pressures refrigerant does NOT
leak
through these holes. The high pressure hose, between compressor and
condenser,
is prone to fatigue and leakage. Griffiths stocks this hose line
assembly
made of barrier hose. Replacement of the other hose assemblies can be
expensive.
Griffiths offers a quick-turn-around rebuilding service for these other
hose lines that is very cost effective, using new barrier hose.
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NOTICE:
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consent of Griffiths Technical Inc.
Porsche® is a registered trademark of Dr. Ing. h. c. F. Porsche
AG.
Kuehl is a trademark of Griffiths Technical Inc.
page revised 01/01/12