ENGINE SEALING FOR GROUPS “S” and “N” TO BE MANDATORY FROM 1.1.2018

The purpose of engine sealing is to maintain the integrity of the cylinder bore and stroke measurements.

 All engines to be sealed by a;

1. Historic Eligibility Officer or,
2. Motorsport Australia Technical Commissioner or,
3. Any Motorsport Australia category authorised engine inspector/engine sealer

Engines are to be sealed in accordance with the following procedure.

1. The sealer for the engine being sealed will not have any association with the particular vehicle which the engine is being sealed for.
2. Engine to be assembled to a short motor.
3. Measure cylinder bore and stroke.
4. Bore and stroke must respect the engine regulation and specification information. Refer to the Motorsport Australia Specification Sheet for the particular vehicle. If the measurements exceed the allowed specifications then the engine will not be sealed.
5. Observe for any unauthorised modifications.
6. Bolts to be wired and seals to be in place as necessary.
7. List bore/stroke measurements and any observations on the form.
8. The engine sealer is to provide to the competitor a Motorsport Australia Engine Inspection Sheet signed with a clearly printed name of the inspector.
9. The Competitor will retain a copy of the engine sealing results for your records as you may be required to provide this information to the Motorsport Australia representative when requested.

1. Where there is a question of a suspect engine at a race meeting and the engine is found to be not sealed, the engine is to be sealed and the matter referred to the Stewards of the Event.
2. Engines sealed prior to inspection/measuring will be subject to inspection at the convenience of the competitor i.e: When the engine is being dismantled for maintenance.
3. Where the engine is requested to be dismantled for inspection (either as a result of a protest and/or at the discretion of the Stewards) and if found to be non-compliant the competitor will lose any accrued points from the time the engine was sealed, a charge is to be raised and referred to the Stewards for deliberation.

IF THE ENGINE SEAL IS REMOVED FOR ANY REASON THE COMPETITOR MUST COMPLETE A SEAL REMOVAL FORM AND FORWARD A COPY TO THE CATEGORY TECHNICAL COMMISSIONER.

Note:
Engines that have Motorsport Australia approved aftermarket parts installed (such as  cylinder heads, engine blocks) may require extra sealing procedures to be carried out during assembly. Refer to the vehicle make and model Specification Sheet for details.

Rotary engined vehicle must have engines checked for porting modifications and sealed during assembly.  

ENGINE SEALING FOR GROUPS “C” AND “A” UPDATE FROM 1.1.2024

The purpose of engine sealing is to maintain the integrity of the engine dimensions, capacities, and weights as well as ensuring components are aligned to the specification year of the vehicles as set out in homologation documents, period specification documents, published Motorsport Australia regulations and vehicle identification records such as the Certificate of Description (the Technical Documents).

 All engines to be sealed by a;

1. Historic Eligibility Officer or,
2. Motorsport Australia Technical Delegate or,
3. Motorsport Australia category authorised engine inspector/engine sealer authorised by the Group C and A, Motorsport Australia Technical Delegate

Important note: The engine sealer must not have any association with the vehicle for which the engine is being sealed. i.e. engine builder, owner, driver or employee of these.

Engines are to be sealed in accordance with the following procedure, with all details recorded on the Motorsport Australia Engine Inspection Sheet – Group C and A

1. The engine must be assembled to a short motor stage ready for inspection.
2. Adequate fixings (such as 2.0 mm drilled bolts) must be made available by the engine builder to allow the engine seals to be attached. The engine seals shall be positioned so that future disassembly of the major components of the engine shall necessitate the seal being removed.
3. The engine seals utilised must only be the controlled seals provided by the Group C and A Motorsport Australia Technical Delegate. 
4. The engine sealer must measure and record the cylinder block dimensions and particulars on the Engine Inspection Sheet.
5. The engine sealer must measure and record the cylinder head dimensions and particulars on the Engine Inspection Sheet.
6. All observed dimensions and particulars must comply with the technical documents. Particulars and requirements may differ from year to year and between Group C and A.
7. Should all the engine dimensions and particulars comply with the technical documents, the engine may be sealed.
8. Should any of the engine dimensions and particulars not comply with the technical documents, inclusive of dimensions, particulars or modifications/enhancements, the engine may not be sealed. 
9. Upon sealing the engine, the engine sealer shall furnish the vehicle owner with a copy of the completed Engine Inspection Sheet, executed with the signature and clearly printed name of the engine sealer (inclusive of their Motorsport Australia ID number). A photo or copy of the Engine Inspection is to be provided to the Motorsport Australia Technical Delegate. 
10. When the vehicle is next presented for competition, the completed Engine Inspection Sheet shall be produced upon request and the engine seal number shall be recorded in the historic vehicle logbook.

1. Where there is a question of an engine at a race event where the engine is found to be not sealed, in order for the competitor to qualify/race the engine is to be sealed with a red control seal and the competitor will be given 12 months to have the engine measured and resealed. No points will be accrued until the engine is measured and resealed.
2. Engines sealed prior to the race event after February 2024 by an unauthorised person will be sealed with a red seal and will be subject to a full inspection and measurement within 12 months.
3. Where the engine is requested to be dismantled for inspection (either as a result of a protest and/or at the discretion of the Stewards) and if found to be non-compliant the competitor will lose any accrued points from the time the engine was sealed, a charge is to be raised and referred to the Stewards for deliberation.

For further information, refer to the Group C and A engine seal policy found on the Heritage Touring Car website or in the ‘Useful forms’ section below.