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Porsche > Engine Rebuild Parts > Gaskets & Sets >

Gasket For Weber 40 Series 3 Barrel Carburettor. Porsche 911 / 914 1965-76
Gasket For Weber 40 Series 3 Barrel Carburettor. Porsche 911 / 914 1965-76 - 90110093701
Gasket For Weber 40 Series 3 Barrel Carburettor. Porsche 911 / 914 1965-76 - 90110093701, 90110093700
2
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90110093701
Product Information
Product Information
Gasket For Weber 40 Series 3 Barrel Carburettor.
The Porsche Gasket for Weber 40 Series 3-Barrel Carburettor is a genuine OEM replacement part designed for classic Porsche models fitted with Weber 40 IDA 3-barrel carburettors. This gasket provides a reliable seal between carburettor components, preventing air or fuel leaks and ensuring your engine runs smoothly and efficiently.

Fits:
  • Porsche 911 1965-1968 2.0L / 912 SWB (F)
  • Porsche 911 1970-1971 2.2L / 2.4L / 2.7L RS LWB (F)
  • Porsche 914 (1970-1976)

What This Product Does:

  • Forms a sealed connection between parts of the carburettor assembly (for example between sections of the carb body, base, bowls etc.), preventing air or fuel leaks. This ensures the carburettor internal pressures, fuel/air mixture, and fuel delivery stay as designed.
  • Helps maintain vacuum and avoids unmetered air entering the mix, which would upset the air-fuel ratio.
  • Keeps fuel/air paths, float chambers, and throttle linkage parts sealed so the carburettor performs reliably and efficiently.

Symptoms Of A Worn Or Failing Gasket:
If this gasket is leaking or degraded, you might notice:
  • Rough idle or unstable idle because air leaks introduce unmeasured fresh air, upsetting the mixture.
  • Hesitation on acceleration or lean-running behavior, especially when the engine is under load.
  • Backfiring or popping in exhaust/intake due to incorrect mixture or vacuum leaks.
  • Fuel smell or visible fuel seepage near the carburettor seams.
  • Higher fuel consumption or poor economy due to less efficient combustion.
  • Difficult starting, especially when cold, because gasket leaks can make mixture control harder.

Why Replacement Matters:
A correct gasket ensures the carburettor works as intended: stable mixture, good performance, reliable idle, and safe fuel sealing.
Prevents damage: leaks can allow dirt or debris into the carburettor or intake, potentially damaging internal parts.
Helps maintain emissions and driveability. Classic cars are particularly sensitive to small leaks.
Uses the OEM specification so fit, material, sealing properties are correct, preserving originality and value for restorations.


Diagram Ref No 11



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

90110093701
90110093701
90110093700

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Hylomar Anaerobic Gasket Compound - 300ml Cartridge
2
Hylomar Anaerobic Gasket Compound - 300ml Cartridge
F/HG3400H/300M
Product Information
Product Information
Hylomar Gasket 3400 is a modified anaerobic curing, flexible sealant designed to become a Formed in Place (FIP) Gasket when cured. The cured compound has good temperature resistance and high resistance to fretting. The cure is initiated when the compound is in contact with metal ions and in anaerobic conditions. The cure rate and final strength is dependent on the metals being joined and the temperature at which the component is used. The heat generated by a running engine will accelerate the cure.

Typical Applications
Hylomar Gasket 3400 can be used as a gasketing compound between machined surfaces. It is ideal for sealing between mating faces on engines and transmission components where resistance to temperature and vibration are essential.

INSTRUCTIONS FOR USE
Hylomar Gasket 3400 should be applied to clean and dry surfaces, free of contamination such as oil or grease. The compound may be dispensed by hand from cartridge, concertina pack, or via a screen printing system. Once applied the joint should be assembled as soon as practical. Any excess compound can be easily wiped off external surfaces with a clean cloth soaked in Acetone or other suitable solvents.

Typical Physical Properties:

UNCURED PRODUCT
Composition: Methyl-Methacrylate
Colour: Yellow
Viscosity @ 25°C / Brookfield Spindle 6 @ 2.5rpm: 100,000cps
Specific Gravity @ 25°C: 1.10 g/ml
Solvent Content:  None

Specific Gravity g/ml @ 25°C: 1.04
Flash Point: >100°C
Shelf Life: 1 Year @ 4° to 25°C

CURED PRODUCT
Handling Time: 40 minutes
Functional Cure Time: 4 – 6 hours
Full Cure Time : 24 – 72 hours

Shear Strength :  1.5 N/mm²
Mild Steel/Mild Steel BS 5350 Part C5
Aluminium/Aluminium BS 5350 Part C5

Temperature Range: -40° to 150°C