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- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
Here is the ultimate tool to press the cylinders in and out of the water jacket on GT3, Turbo, and RS/RSR 996/997 engines.
This kit includes everything you need to safely, accurately, quickly, and conveniently perform this critical task.
Each kit contains:
• ring compressor (1 @102.7)*,
• Delrin cylinder spacers (4),
• complete stainless steel/AL press,
• aluminum cylinder bushing,
• bolts, and a sturdy storage case.
*100mm ring compressor (1) available separately.
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 914 (1970-1976)
Cylinder head copper base gasket 0.25mm
Copper 0.25mm cylinder base gasket by Porsche for selected Porsche 911 models from 1965–73 and the 914-6 from 1970–76. This gasket fits between the cylinder barrel and engine crankcase during flat-six engine assembly.
Sold each
Fits:
Porsche 911 1965 - 1973
Porsche 914-6 1970 - 1976
Diagram ref no 26
What This Product Does
The gasket seals the joint at the base of the cylinder while maintaining the specified spacing between the cylinder and crankcase. Its thickness contributes to cylinder positioning and must be considered when measuring deck height and rebuilding the engine.
Functions
- Seals the cylinder-to-crankcase joint
- Provides a controlled 0.25mm base thickness
- Supports correct cylinder positioning during assembly
- Helps prevent oil seepage around the cylinder base
- Forms part of the sealing system for each cylinder
Technical Details
- Porsche reference: 90110419100
- Material: copper
- Thickness: 0.25mm
- Inner diameter: approximately 92.2mm
- Outer diameter: approximately 103mm
- Required quantity for a complete flat-six engine: 6
Internal application data also identifies use with 911 T-E/E, 911 T-V and 911 T-K engine or model variants. Confirm the required gasket thickness through the appropriate engine measurements before assembly.
Symptoms of Fault
- Oil seepage visible around the cylinder-to-crankcase joint
- A flattened, distorted or damaged gasket found during dismantling
- Previous use of unsuitable sealant around the cylinder base
- Incorrect cylinder height or deck measurements during an engine rebuild
Why Replacement Matters
A cylinder base gasket can become compressed or damaged after installation and should be inspected whenever the cylinders are removed. Installing the specified gasket helps restore the intended cylinder spacing and sealing arrangement. During a full rebuild, all cylinders should be measured and assembled consistently, with related seals, hardware and wear components checked while access is available.
OE Reference
- 90110419100
- 901.104.191.00
FAQs
- How many gaskets are required?
Diagram data specifies six for a complete flat-six engine. Confirm the quantity needed for the work being undertaken. - Can an old cylinder base gasket be reused?
Replacement is advisable once the cylinder has been removed because the installed gasket may be compressed or distorted. - Does gasket thickness matter?
Yes. Base-gasket thickness affects cylinder positioning and should match the engine measurements and rebuild specification. - What should be checked during installation?
Inspect the cylinder and crankcase mating surfaces, verify deck measurements and check the associated seals and hardware.
Check fitment for your specific vehicle, model year and engine before ordering.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90110419100
The product you are viewing cross references to these numbers
- Porsche 914 (1970-1976)
Sold each - 4 required per car
Fits:
Porsche 914 2.0ltr - 1970 to 1976
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
039198075
The product you are viewing cross references to these numbers
- Porsche 914 (1970-1976)
Sold each - 4 required per car
Fits:
Porsche 914 2.0ltr - 1970 to 1976
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
039198075A
The product you are viewing cross references to these numbers