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- Porsche 996 TURBO 2000-05
Coolant return hose by OE Match for the Porsche 996 Turbo 3.6L from 2001 to 2005. This moulded water hose forms part of the return circuit at the oil cooler console and oil filter bracket.
Fits
- Porsche 996 Turbo 2001-05
What This Product Does
The hose carries engine coolant through the return side of the oil cooler and heat-exchanger circuit. Its formed shape allows the coolant connection to follow the intended routing around the oil filter bracket assembly without placing unnecessary strain on adjacent unions.
Functions
- Returns coolant from the oil cooler console circuit
- Maintains a sealed coolant connection at the oil filter bracket assembly
- Supports coolant circulation and engine temperature control
- Follows the original hose routing for the specified application
Technical Details
- Current reference: 99610632874
- Previous reference: 99610632872
- Component description: water hose return line
- Installation area: oil cooler console and oil filter bracket
- Application: Porsche 996 Turbo 3.6L
Symptoms of Fault
- Visible coolant seepage or dried residue around the hose ends
- Coolant odour after driving
- A gradual reduction in the coolant level
- Rubber that has become swollen, cracked, hardened or unusually soft
- Coolant collecting on the engine or surrounding components
- Rising or unstable engine temperature if coolant loss becomes significant
Why Replacement Matters
Repeated heat cycles can age coolant hoses and weaken the sealing areas around their connections. Replacing a deteriorated return hose helps restore the integrity of the coolant circuit and reduces the risk of further leakage. The hose clamps, neighbouring pipes and accessible seals should also be inspected during installation, as worn supporting components can cause recurring coolant loss.
Check fitment for your specific vehicle (model, year, engine) before ordering.
OE Reference
- 99610632874
- 99610632872
FAQs
- Does 99610632874 replace 99610632872?
Yes. 99610632872 is the previous reference associated with the later 99610632874 hose. - Where is this hose installed?
It is the coolant return line serving the oil cooler console at the oil filter bracket assembly. - What should be checked during replacement?
Inspect the hose clamps, connection points and nearby seals for corrosion, damage or coolant residue before refilling and bleeding the system. - Should the cooling system be pressure-tested?
A pressure test can help identify other leaks and confirm that the repaired circuit seals correctly.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610632874
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Front Radiator Engine Oil Cooler "Snake Type"
Restore efficient oil temperature control to your classic
air-cooled Porsche with this OE Match Front Radiator Engine Oil Cooler. Better known as the Snake Type Oil Cooler
or Trombone Oil Cooler, this OE-quality replacement is designed to match
the original equipment fitted to Porsche 911 models.
Fits:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Positioned within the front right-hand wheel arch, the Trombone Oil Cooler forms an integral part of Porsche's legendary dry sump lubrication system. Its distinctive looped tube design increases the surface area exposed to airflow, allowing engine oil to dissipate heat before returning to the oil tank. Although simple in construction compared to later finned radiator-style coolers, the Trombone Oil Cooler proved to be an effective and reliable solution for controlling engine oil temperatures in early impact bumper 911s and first-generation 930 turbos.
Manufactured to OE Match specifications, this replacement offers factory-correct fitment, dependable performance and excellent durability, making it the ideal choice for restorations, preventative maintenance and originality-focused repairs.
What Does the Snake Type (Trombone) Oil Cooler Do?
Unlike water-cooled engines, air-cooled Porsche engines rely
heavily on engine oil to remove heat as well as lubricate internal components.
The front-mounted Trombone Oil Cooler helps to:
- Reduce engine oil temperatures.
- Improve heat dissipation during sustained driving.
- Maintain stable oil viscosity.
- Protect pistons, bearings and internal engine components.
- Improve engine reliability during hot weather and spirited driving.
- Extend engine life by maintaining consistent operating temperatures.
By cooling the oil before it returns to the engine, the Trombone Oil Cooler plays a vital role in preserving the health of your classic flat-six engine.
Why Do Trombone Oil Coolers Need Replacing?
After decades of service, the original oil cooler may suffer
from:
- External corrosion caused by moisture and road salt.
- Stone damage from debris entering the wheel arch.
- Impact damage.
- Internal contamination.
- Fatigue cracks or pinhole leaks.
- Damage caused during previous repairs.
- Reduced cooling efficiency due to age.
Even a minor oil leak can lead to falling oil pressure and increased engine temperatures, making timely replacement essential.
Symptoms of a Failing Oil Cooler
Common warning signs include:
- Engine oil leaks around the front wheel arch.
- Oil residue on the cooling loop.
- Rising engine oil temperatures.
- Burning oil smell after driving.
- Visible corrosion or physical damage.
- Reduced cooling performance.
- Falling oil level without obvious engine leaks.
Any evidence of oil leakage should be investigated immediately to prevent costly engine damage.
When Should the Oil Cooler Be Replaced?
Replacement is recommended when:
- Oil leaks develop.
- The cooling loop becomes corroded or damaged.
- Accident damage has occurred.
- Restoring a classic Porsche to factory condition.
- Replacing front oil pipes or oil lines.
- Carrying out a complete engine rebuild or lubrication system overhaul.
Replacing ageing oil cooling components helps maintain optimum lubrication and protects your engine for years to come.
Why Choose an OE Match Oil Cooler?
Our OE Match Snake Type Oil Cooler has been manufactured to faithfully reproduce the original Porsche component.
Benefits include:
- Authentic Snake Type (Trombone) configuration.
- OE-quality construction and fitment.
- Precision-formed cooling loop.
- Excellent oil flow characteristics.
- Corrosion-resistant finish.
- Straightforward installation using factory mounting points.
- Perfect for restoration and maintenance projects.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91120705001
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Fits:
Porsche 911 SC 1980-83
Porsche 911 3.2L 1984-86
Click 'Zoom in' for large parts diagram.
Diagram ref no 11, 11A, 12, 12A, 13A, 13B, 13C, 13D, 18, 20, 21, 22, 23, 25, 26 and 27.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
OILCOOLERKIT01
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Fits:
Porsche 911 1974-79
Click 'Zoom in' for large parts diagram.
Diagram ref no 18, 19, 20, 21, 22, 23, 24**, 25, 27, 28, 29, 30, 32, 33 and 34.
#24** the part is no longer available, so this is not included in this kit
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
OILCOOLERKIT02
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
Front Radiator Oil Cooler
Mounted at the front of the vehicle's external oil cooling
circuit, the cooler uses passing airflow to remove excess heat from the
circulating engine oil. This is particularly important on air-cooled Porsche
911 engines, where engine oil plays a major role in both lubrication and
temperature control.
Fits:
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
Diagram Ref No 13
What Does the Front Oil Cooler Do?
Hot engine oil is circulated from the rear-mounted engine through the external oil lines to the front cooler. Air passing through the cooler removes heat from the oil before it returns through the lubrication system.
Maintaining a suitable oil temperature helps preserve oil viscosity and provides reliable lubrication for bearings, camshafts and other heavily loaded engine components.
Why Do Oil Coolers Fail?
After decades of use, an original Porsche 911 oil cooler can
deteriorate through:
- External corrosion
- Oil leaks
- Damaged or corroded fittings
- Stone and road debris damage
- Bent or damaged cooling fins
- Internal contamination
- Previous accident damage
- Blocked airflow through accumulated dirt and debris
Oil leakage or restricted cooling efficiency should be investigated promptly, particularly on an air-cooled engine.
When Should It Be Replaced?
Replacement should be considered if the cooler is leaking, physically damaged, badly corroded or no longer providing effective heat transfer.
Unusually high engine oil temperatures should not automatically be blamed on the cooler. The external thermostat, oil pipes, airflow, oil level and associated cooling components should also be checked before replacement.
Important Installation Information
The cooler does not include the temperature sensor or blanking plug and washer. These are available separately and should be selected according to the vehicle's installation.
When replacing the cooler, also inspect:
- External oil pipes and hoses
- Oil line connections
- Oil thermostat operation
- Cooler mounting rubbers and brackets
- Temperature sensor where fitted
- Airflow around the cooler
- Evidence of contamination within the oil circuit
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93020705304
The product you are viewing cross references to these numbers