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Porsche // 924 (1977-1988) // 924S 2.5L 1988
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- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
The Genuine Porsche Lower Heat Deflector (Part Numbers: 9A110431300 and 9A110431400) is an original equipment engine heat protection component designed for selected Porsche 911 (991.1) Carrera models manufactured between 2012 and 2016.
Fits:
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
Manufactured to Porsche's original equipment specifications, these heat deflectors are fitted to the lower section of the cylinder head and valve cover area, helping protect surrounding engine components from excessive heat exposure.
Available in separate configurations for cylinders 1–3 and cylinders 4–6, the lower heat deflectors form part of the engine's original thermal protection arrangement, working alongside the corresponding upper heat insulation components.
During operation, Porsche's naturally aspirated flat-six engine generates substantial heat. The lower heat deflectors help shield nearby components from radiant heat, supporting the protection of sensitive engine parts, wiring, seals and surrounding materials.
Over time, original heat deflectors can become corroded, distorted, cracked or damaged due to repeated heating and cooling cycles, engine vibration and physical impact during maintenance.
A damaged or missing heat deflector may reduce the intended thermal protection of surrounding components, potentially increasing their exposure to excessive temperatures.
Replacing a deteriorated lower heat deflector with a Genuine Porsche component helps restore the original engine heat protection arrangement, maintain correct component shielding and preserve the manufacturer's intended engine configuration.
Ideal for engine servicing, cylinder head repairs, valve cover maintenance and Porsche restoration projects, these Genuine Porsche heat deflectors provide correctly shaped replacements for compatible vehicles.
What This Product Does:
The lower heat deflector is a protective component fitted around the lower section of the engine cylinder head and valve cover assembly.
Its primary purpose is to help shield surrounding engine components from radiant heat generated during normal engine operation.
As the engine reaches operating temperature, heat is transferred through the cylinder heads, exhaust components and surrounding structures.
The lower heat deflector helps reduce direct radiant heat exposure in the protected area, supporting the long-term condition of nearby engine components.
Its main functions include:
- Providing thermal protection: Helps shield surrounding engine components from excessive radiant heat.
- Protecting sensitive components: Reduces heat exposure around nearby wiring, hoses, seals and other heat-sensitive materials.
- Supporting engine compartment heat management: Helps maintain the intended distribution of heat around the cylinder head assembly.
- Reducing localised heat exposure: Provides a protective barrier between heated engine areas and adjacent components.
- Maintaining original engine protection: Works with the upper heat insulation components to preserve Porsche's intended thermal shielding arrangement.
- Supporting component durability: Helps reduce prolonged heat exposure that may contribute to premature deterioration of nearby materials.
- Maintaining correct factory fitment: Provides the original shape and positioning required for the applicable cylinder bank.
- Supporting reliable engine operation: Helps preserve the protection of components surrounding the cylinder heads.
Symptoms Of Wear Or Failure:
Engine heat deflectors are continually exposed to elevated temperatures, repeated thermal expansion, vibration and environmental contamination.
Although these components do not contain moving parts, they may deteriorate through corrosion, fatigue or mechanical damage.
Common signs that a lower heat deflector requires replacement include:
- Visible corrosion: Moisture, road contamination and repeated heat exposure may cause corrosion or deterioration of the deflector surface.
- Cracked or fractured material: Repeated heating and cooling cycles may contribute to fatigue or cracking.
- Warped or distorted shape: Excessive heat or physical damage can cause the deflector to lose its original profile.
- Loose mounting points: Damaged retaining holes or fasteners may prevent the deflector from remaining securely attached.
- Metallic rattling noises: A loose or damaged deflector may vibrate against surrounding engine components.
- Missing or broken sections: Physical damage may reduce the effectiveness of the thermal barrier.
- Heat-related deterioration nearby: Discolouration, brittle insulation or damaged adjacent components may indicate excessive localised heat exposure.
- Incorrect positioning: A displaced deflector may no longer provide the intended coverage.
- Damage during maintenance: Heat shields can become bent or damaged during cylinder head, valve cover or surrounding engine repairs.
- Contact with surrounding components: A distorted or incorrectly installed heat deflector may create unwanted contact or vibration.
Why Replacement Matters:
Replacing a damaged lower heat deflector is important for maintaining the original heat protection arrangement of the Porsche 911's engine.
A cracked, distorted or missing deflector may leave nearby engine components exposed to additional radiant heat, potentially contributing to the deterioration of wiring insulation, seals and other heat-sensitive materials.
Loose or damaged heat deflectors can also generate unwanted vibration and rattling noises during engine operation.
Installing a Genuine Porsche replacement Lower Heat Deflector helps to:
- Restore factory thermal protection: Reinstate the intended heat shielding around the lower cylinder head area.
- Protect surrounding components: Reduce direct radiant heat exposure to nearby engine parts and materials.
- Maintain engine compartment heat management: Preserve the thermal protection arrangement designed by Porsche.
- Prevent unwanted rattling: Replace loose, cracked or damaged deflectors that cause vibration-related noises.
- Restore secure mounting: Ensure the heat protection component is correctly positioned and retained.
- Reduce heat-related deterioration: Help protect sensitive materials from prolonged exposure to elevated temperatures.
- Maintain original engine configuration: Replace damaged components with the correct factory-specified part.
- Support long-term engine reliability: Preserve the protection of components operating within demanding temperature conditions.
- Assist with engine repairs: Provide replacement heat shielding during cylinder head or valve cover servicing.
- Support Porsche restoration: Restore missing or deteriorated original equipment components.
- Maintain Genuine Porsche quality: Ensure the intended fitment and component design for compatible vehicles.
Replacement is particularly recommended when the original heat deflector shows visible damage, corrosion, deformation or insecure mounting.
When carrying out engine repairs, inspecting both the upper and lower heat protection components is advisable to ensure the original shielding arrangement remains complete.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A110431
The product you are viewing cross references to these numbers
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
Require 10 per engine. Price is for each.
Fits
Porsche 924S 1986-88
Porsche 944
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94410119700
The product you are viewing cross references to these numbers
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
Fits:
Porsche 924S 8V 1986-88
Porsche 944 8V 1982-91
Click 'Zoom in' for large parts diagram
Diagram ref no 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95110437402
The product you are viewing cross references to these numbers
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Fits:
Porsche 924 S 1986-88
Porsche 928 S4 / GT / GTS 1987-95
Porsche 944 1982-91
Porsche 968 1992-95
Click 'Zoom in' for large parts diagram.
Diagram ref no 40
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94410422900
The product you are viewing cross references to these numbers
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Fits:
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92810619704
The product you are viewing cross references to these numbers