Porsche 964 / 993 Twin-Plug Ignition Distributor 0 237 503 004 – Professional Rebuild

Description

Porsche 964 / 993 Twin-Plug Ignition Distributor 0 237 503 004 – Professional Rebuild

We offer the complete rebuild and overhaul of your Bosch twin-plug ignition distributor 0 237 503 004 for the Porsche 911 Carrera of the 964 and 993 series.

The work is performed in our specialized ignition distributor workshop at Radspieler Classic GmbH in Gundremmingen, Germany.

In contrast to a simple repair or a mere timing belt change, our rebuild includes a comprehensive technical reconditioning of the ignition distributor, including the replacement of essential wear parts, the inspection of its mechanical functions, and a final test on our ignition distributor test benches.

Our goal is to restore the original function and reliability of your Bosch twin-plug ignition distributor in accordance with the original manufacturer specifications.

Why is the overhaul of the Porsche twin-plug ignition distributor important?

The Porsche 964 and 993 models feature a twin-plug ignition system with two separate ignition circuits.

In the Bosch twin-plug ignition distributor, the second ignition circuit is driven by an internal timing belt.

This timing belt, as well as the bearings and other mechanical components, is subject to stress due to age and usage.

A worn or snapped timing belt can lead to the failure of the second ignition circuit and cause serious consequential damage.

Therefore, we recommend regularly checking the condition of the twin-plug ignition distributor and having it professionally rebuilt if wear is detected.

Our Scope of Services – Bosch Twin-Plug Ignition Distributor 0 237 503 004, 93060201501

1. Inspection and Disassembly

• Inspection of the submitted ignition distributor
• Professional disassembly and complete teardown
• Inspection of mechanical components and bearings
• Check of existing wear parts

2. Technical Rebuild

• Replacement of the thrust bearing
• Renewal of the three angular contact ball bearings
• Replacement of the internal timing belt
• Renewal of worn thrust and fiber washers (including three fiber washers)
• Renewal of further wear parts included in the agreed scope of services
• Cleaning and professional preparation of individual components
• Careful assembly in accordance with manufacturer specifications

3. Cosmetic Refurbishment

• Glass bead blasting of the housing and suitable attachments
• Polish blasting and surface treatment
• Treatment of suitable components in a chemical bath
• Painting or preservation according to original factory finish, if applicable

4. Final Functional Test

Upon completion of the rebuild, your Bosch twin-plug ignition distributor will be tested on our in-house test benches.

• Test bench run up to 8,000 rpm
• Inspection of mechanical function
• Adjustment and control work according to Bosch manufacturer specifications
• Final measurement
• Documentation of results in the inspection report

You will receive your own ignition distributor back after completion of the work, along with the documentation of the final test.

Compatible Vehicles

The rebuild is intended for the Bosch twin-plug ignition distributor 0 237 503 004, 93060201501, used in the following Porsche models, among others:

Porsche 911 – 964 Series

• Porsche 911 Carrera 2
• Porsche 911 Carrera 4
• Porsche 911 Carrera RS / Carrera 2 RS
• Engine: 3.6 liter, M64 engine family
• Production years of corresponding versions: approx. 1989–1993

Porsche 911 – 993 Series

• Porsche 911 Carrera
• Porsche 911 Carrera 4
• Porsche 911 Carrera 4S
• Porsche 911 Carrera RS
• Engine: 3.6 or 3.8 liter, depending on version
• Production years of corresponding versions: approx. 1993–1998

Important: Exact compatibility must be verified using the installed Bosch ignition distributor number. Vehicle assignment may vary depending on engine, production year, and version.

Product and Service Information

• Distributor Manufacturer: Bosch
• Bosch Part Number: 0 237 503 004 / 0237503004
• Porsche Part Number: 93060201501
• Item: Twin-plug ignition distributor / Tandem ignition distributor
• Service: Rebuild and overhaul of the customer’s own ignition distributor
• Vehicle Manufacturer: Porsche
• Series: Porsche 911 (964 / 993)
• Turnaround Time: approx. 10–15 business days
• Execution: Technical and cosmetic refurbishment
• Performed by: Radspieler Classic GmbH, Gundremmingen, Germany

Important Notes on the Scope of Services

The rebuild refers to your submitted Bosch twin-plug ignition distributor.

Distributor caps and distributor rotors are not included in the stated price. These can be purchased separately at an additional cost if required.

The exact extent of the cosmetic refurbishment depends on the selected variant.

If additional damage or defects not included in the agreed scope of services are discovered during the inspection, we will coordinate the necessary measures with you before proceeding.

How to Order Our Ignition Distributor Rebuild

Would you like to have your Porsche twin-plug ignition distributor professionally inspected and rebuilt by us?

Through our order portal, you can book a fixed-price diagnosis and send in your ignition distributor for technical evaluation.

Upon receipt, we will inspect the distributor, document its condition, and, if necessary, provide an individual quote for the rebuild.

Following your approval, we will perform the agreed work. Finally, your ignition distributor will be tested on our test benches and returned together with the inspection report.

Click here for our order portal for ignition distributor rebuilds

Radspieler Classic – Professional Bosch ignition distributor rebuild. Authentic technology, precision, and quality from Germany.