The Multiquip 8970661970 is a genuine OEM Cylinder Head Gasket DCA-45USJ 4JG1 designed for the DCA-45USJ ultra-silent diesel generator. Sourced directly from Multiquip, this part is manufactured to the exact sealing specifications required by the Isuzu 4JG1 engine platform used in DCA-45USJ equipment. Choosing a genuine OEM component ensures the correct material grade, surface finish, and compression rating — all critical factors for a cylinder head gasket that must hold combustion pressure across thousands of operating cycles. If you are servicing a DCA-45USJ unit, verify your engine code against the 4JG1 designation before ordering.
Key Features
- Combustion-Grade Sealing Material — Engineered to the precise compression rating and surface tolerance required by the 4JG1 engine, ensuring a complete seal between the cylinder head and engine block.
- Direct OEM Replacement — Matches the original gasket profile and bolt-pattern layout of the DCA-45USJ engine, allowing straightforward installation without fitment adjustments.
- Confirmed Fitment for DCA-45USJ — Verified for the Multiquip DCA-45USJ ultra-silent diesel generator equipped with the Isuzu 4JG1 engine.
- Sustained Power Output — A correctly seated cylinder head gasket maintains proper compression, enabling the DCA-45USJ to deliver consistent, rated power output on the job. A failed gasket causes compression loss, overheating, and coolant or oil contamination of the combustion chamber.
- Fuel and Coolant Integrity — Genuine OEM construction prevents combustion gas blowby and cross-contamination between oil, coolant, and combustion passages — a critical safety consideration for a sealed-enclosure generator running in proximity to people and equipment.
The cylinder head gasket sits between the engine block and the cylinder head, forming a sealed barrier that contains combustion pressure while keeping engine oil and coolant in their respective passages. On a diesel generator like the DCA-45USJ, this seal must withstand repeated thermal cycling and high cylinder pressures over long run times. When a head gasket fails, the engine may lose compression, produce white or blue exhaust smoke, run rough, or suffer internal fluid contamination — all conditions that require immediate shutdown and repair to prevent further engine damage.
Part Details
| Part Number | 8970661970 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Cylinder Head Gasket DCA-45USJ 4JG1 |
Compatibility & Fitment
| Name | Model |
|---|---|
| DCA-45USJ | DCA-45USJ |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
