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Big end conrod bearings. Porsche 993 / 996 Turbo - 99310314715
99310314715/2
Vehicle Group
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 TURBO 2000-05
Information
Big end conrod bearings. Standard size.
SET OF 12.
Fits:
Porsche 993 1994-98
Porsche 996 Turbo
Diagram Ref No 15.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310314715
The product you are viewing cross references to these numbers
SET OF 12.
Fits:
Porsche 993 1994-98
Porsche 996 Turbo
Diagram Ref No 15.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310314715
99310314715
9931031471
71-3775
71-3775
The product you are viewing cross references to these numbers
Price: £125.00
In stock
Related products
Vehicle Group
- Porsche 356A 1955-59
- Porsche 356B 1959-63
Information
Main Crankshaft Bearing Set, Standard.
The OE Match Main Crankshaft Bearing Set, Standard is a premium-quality replacement engine bearing kit designed to support the crankshaft and maintain precise rotational alignment in compatible Porsche engines. Manufactured to OE specifications for fit, material quality and durability, this standard-size main bearing set restores the correct bearing clearances between the crankshaft and engine block, ensuring optimum oil pressure, smooth crankshaft rotation and long-term engine reliability.
Fits:
Diagram Ref No 13
Manufactured from premium tri-metal bearing materials with a precision-machined bearing surface, each bearing shell is engineered to provide exceptional load-carrying capacity, low friction characteristics and excellent resistance to wear under demanding operating conditions. Designed for direct OE-style installation, this standard-size bearing set is ideal for engine rebuilds where the crankshaft journals remain within original factory specifications.
What This Product Does:
Symptoms Of Wear Or Failure:
Why Replacement Matters:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
54610190100
The product you are viewing cross references to these numbers
The OE Match Main Crankshaft Bearing Set, Standard is a premium-quality replacement engine bearing kit designed to support the crankshaft and maintain precise rotational alignment in compatible Porsche engines. Manufactured to OE specifications for fit, material quality and durability, this standard-size main bearing set restores the correct bearing clearances between the crankshaft and engine block, ensuring optimum oil pressure, smooth crankshaft rotation and long-term engine reliability.
Fits:
- Porsche 356A 1955-59
- Porsche 356B 1959-63
Diagram Ref No 13
Manufactured from premium tri-metal bearing materials with a precision-machined bearing surface, each bearing shell is engineered to provide exceptional load-carrying capacity, low friction characteristics and excellent resistance to wear under demanding operating conditions. Designed for direct OE-style installation, this standard-size bearing set is ideal for engine rebuilds where the crankshaft journals remain within original factory specifications.
What This Product Does:
- Supports the crankshaft within the engine block.
- Maintains precise crankshaft bearing clearances.
- Allows smooth, low-friction crankshaft rotation.
- Maintains correct engine oil pressure.
- Reduces friction and wear between the crankshaft and engine block.
- Supports reliable engine lubrication.
- Restores factory engine operating tolerances.
- Forms an essential part of the engine bottom-end assembly.
Symptoms Of Wear Or Failure:
- Low engine oil pressure.
- Knocking or rumbling noises from the lower engine.
- Excessive crankshaft movement.
- Metal particles present in the engine oil or oil filter.
- Increased engine vibration.
- Accelerated wear of the crankshaft journals.
- Poor lubrication of internal engine components.
- Engine overheating due to increased friction.
- Loss of engine performance.
- Catastrophic engine failure in severe cases.
Why Replacement Matters:
- The main crankshaft bearings support the crankshaft while maintaining a thin film of pressurised engine oil between the bearing surface and the crankshaft journals. They are subjected to enormous combustion loads, constant rotational forces and continuous lubrication. Over time, normal wear, contamination or insufficient lubrication can damage the bearing surfaces, increasing bearing clearances and reducing oil pressure.
- Worn main bearings can lead to excessive crankshaft movement, reduced lubrication efficiency and accelerated wear of critical engine components. If left unresolved, bearing failure can result in severe crankshaft damage and complete engine failure.
- Replacing worn bearings with the OE Match Main Crankshaft Bearing Set restores the engine's bottom-end integrity, correct bearing clearances and stable oil pressure. Manufactured to OE standards using premium tri-metal bearing construction, this standard-size bearing set provides factory-style fitment, exceptional durability and dependable long-term performance, making it the ideal choice for Porsche engine rebuilds and professional restoration projects.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
54610190100
54610190100
313 09 325
The product you are viewing cross references to these numbers
Price: £235.00
In stock
Vehicle Group
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356C 1963-65
Information
Set Of Main Bearings For Porsche 356C / 912.
Oversize: 0.50 mm Case
Restore correct crankshaft support, oil clearance, and dependable engine operation with this OE Match Set of Main Bearings for Porsche 356C and Porsche 912, available under references 61610013895A, 61610013895AO1, 616100138100A, and 61610013890A.
Engine: Porsche 356C and 912
Sizes available: in "MM"
0.50mm Case / STD Crank
0.50mm Case / STD Crank / Thrust +1mm
0.50mm Case / 0.25mm Crank
0.50mm Case / 0.25mm Crank / Thrust +1mm
0.50mm Case / 0.50mm Crank
Please Pick size when ordering below:
Main bearings are precision internal engine components located between the crankshaft main journals and the engine crankcase. Their purpose is to support the crankshaft while allowing it to rotate smoothly on a controlled film of pressurised engine oil. Correct bearing clearances are essential for maintaining lubrication, controlling crankshaft movement, reducing friction, and protecting the crankshaft and crankcase from excessive wear.
What This Product Does:
Symptoms Of Wear Or Failure:
Why Replacement Matters:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
616100138
The product you are viewing cross references to these numbers
Oversize: 0.50 mm Case
Restore correct crankshaft support, oil clearance, and dependable engine operation with this OE Match Set of Main Bearings for Porsche 356C and Porsche 912, available under references 61610013895A, 61610013895AO1, 616100138100A, and 61610013890A.
Engine: Porsche 356C and 912
Sizes available: in "MM"
0.50mm Case / STD Crank
0.50mm Case / STD Crank / Thrust +1mm
0.50mm Case / 0.25mm Crank
0.50mm Case / 0.25mm Crank / Thrust +1mm
0.50mm Case / 0.50mm Crank
Please Pick size when ordering below:
Main bearings are precision internal engine components located between the crankshaft main journals and the engine crankcase. Their purpose is to support the crankshaft while allowing it to rotate smoothly on a controlled film of pressurised engine oil. Correct bearing clearances are essential for maintaining lubrication, controlling crankshaft movement, reducing friction, and protecting the crankshaft and crankcase from excessive wear.
What This Product Does:
- Supports the crankshaft within the engine crankcase.
- Provides a precision running surface for the crankshaft main journals.
- Allows the crankshaft to rotate smoothly on a lubricating oil film.
- Helps maintain correct crankshaft alignment.
- Controls radial crankshaft movement.
- Helps control crankshaft end float where applicable.
- Reduces direct metal-to-metal contact and friction.
- Supports correct engine oil clearances and lubrication.
- Protects crankshaft journals against excessive wear.
- Withstands substantial combustion and rotational loads.
- Replaces worn or damaged main bearings during an engine rebuild.
- Is intended for compatible Porsche 356C and Porsche 912 engine applications.
Symptoms Of Wear Or Failure:
- Low engine oil pressure.
- Oil pressure becoming particularly low when the engine is hot.
- Deep knocking or rumbling noises from the lower engine.
- Excessive crankshaft movement or end float.
- Metallic particles or bearing material in the engine oil.
- Metallic debris in the oil filter or strainer.
- Excessive main bearing clearance during engine inspection.
- Scoring or abnormal wear of the crankshaft journals.
- Scratched, pitted, or discoloured bearing surfaces.
- Evidence of bearing overheating or oil starvation.
- Uneven or accelerated crankshaft journal wear.
- Serious internal engine damage in advanced cases.
Why Replacement Matters:
- Main bearings are fundamental to the reliability of the engine because they support and locate the crankshaft every time the engine operates. Combustion forces place considerable loads on the crankshaft, and the bearings must maintain a precise lubricated clearance while allowing smooth rotation.
- As main bearings wear, the clearance between the bearing surface and crankshaft journal can increase. Excessive clearance can reduce oil pressure, increase crankshaft movement, and accelerate wear of both the bearings and crankshaft journals. This can eventually result in knocking, poor lubrication, and deterioration of other internal engine components.
- Severe bearing wear can cause the protective oil film to break down, resulting in direct metal-to-metal contact. This may generate excessive heat, score or damage the crankshaft, contaminate the lubrication system with bearing material, and potentially cause major engine failure.
- Correct bearing sizing is especially important when rebuilding a classic Porsche 356C or Porsche 912 engine. Previous crankshaft grinding or crankcase machining can change the required bearing dimensions, meaning a standard-size bearing set may no longer provide the correct running clearance.
- Replacing worn components with the correctly sized OE Match Main Bearing Set – 61610013895A, 61610013895AO1, 616100138100A, or 61610013890A – for Porsche 356C / 912 helps restore correct crankshaft support, oil clearance, lubrication, and dependable engine performance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
616100138
61610013055
The product you are viewing cross references to these numbers
Prices from: £286.32
Vehicle Group
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
Information
Big End Con Rod Bearing Set 0.75MM INNER UNDERSIZE
Fits:
Porsche 912 1965-69
Porsche 356 1300 / 1500 / 1600
Diagram ref no 20
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
61610314272
The product you are viewing cross references to these numbers
Fits:
Porsche 912 1965-69
Porsche 356 1300 / 1500 / 1600
Diagram ref no 20
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
61610314272
61610314272
313 09 349
313093490322
The product you are viewing cross references to these numbers
Price: £159.00
Orderable
Vehicle Group
- Porsche 356A 1955-59
- Porsche 356B 1959-63
Information
Main bearing set, 50mm crank, 1st 0.25mm Case / 3rd 0.75mm Inside.
Fits:
Porsche 356A / 356B 1600 / S
Diagram Ref No 29
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
54610190185
The product you are viewing cross references to these numbers
Fits:
Porsche 356A / 356B 1600 / S
Diagram Ref No 29
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54610190185
313093310322
54610190185
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Price: £235.00
Orderable