The CADILLAC CB 90 is a 2,897 cc, inline-four petrol engine produced between 1994 and 1998. It features a SOHC valvetrain, multi-port fuel injection, and cast-iron block construction, delivering robust low-end torque for utility and off-road applications. In standard tune it produced 81 kW (110 PS) with 218 Nm of torque, forming part of Daihatsu's CB engine family.
Fitted to models such as the Daihatsu Delta, Hijet, and Rugger, the CB 90 was engineered for durability in rugged environments and fleet use. Emissions compliance was achieved through exhaust gas recirculation (EGR) and a catalytic converter, allowing all units to meet Euro 2 standards (VCA UK Type Approval #VCA/EMS/9229).
One documented concern is premature timing chain wear, highlighted in Daihatsu Service Information Bulletin 96-NA-031. This issue is linked to inadequate lubrication at the chain tensioner during cold starts and extended oil change intervals. In 1996, Daihatsu revised the tensioner design and updated oil pump calibration to improve durability, marking a key update during the engine's production run.
All production years (1994–1998) meet Euro 2 emissions standards (VCA UK Type Approval #VCA/EMS/9229).
The CADILLAC CB 90 is a 2,897 cc inline-four petrol engine engineered for utility and off-road models (1994–1998). It combines robust SOHC architecture with multi-port fuel injection to deliver dependable low-RPM torque. Designed to meet Euro 2 standards, it represents a durable iteration of Daihatsu's commercial engine platform.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,897 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, SOHC, 8-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 94.0 mm × 104.0 mm | |
| Power output | 81 kW (110 PS) @ 4,600 rpm | |
| Torque | 218 Nm @ 2,800 rpm | |
| Fuel system | Multi-port fuel injection | |
| Emissions standard | Euro 2 | |
| Compression ratio | 9.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Gear-driven (non-interference design) | |
| Oil type | SAE 10W-30 (API SG) | |
| Dry weight | 198 kg |
The gear-driven SOHC design demands strict adherence to 15,000 km oil change intervals to prevent camshaft and lifter wear. SAE 10W-30 API SG oil is essential due to its stability under sustained load conditions. Extended warm-up periods are recommended before aggressive driving to ensure proper oil circulation. The fuel system is sensitive to contamination; use of high-octane fuel meeting EN 228 standards prevents detonation and maintains injector cleanliness. Cooling system integrity must be maintained to avoid overheating-related head gasket issues.
Oil Specs: Requires SAE 10W-30 API SG specification (Daihatsu Service Manual 1994-0362).
Emissions: Certified to Euro 2 standards (VCA #VCA/EMS/9229).
Power Ratings: Measured under SAE J1349 standards. 81 kW output requires 87 RON fuel (Daihatsu TIS Doc. A24706).
Daihatsu Technical Information System (TIS): Docs A24706, A25159, SIB 96-NA-031
VCA Type Approval Database (VCA/EMS/9229)
SAE International: J1349 Engine Power Certification Standards
The CADILLAC CB 90 was used across Daihatsu's DXx and Rx platforms with longitudinal mounting and shared under partnership with Holden for Australasian market applications. This engine received platform-specific adaptations-shortened intake manifolds in the Delta and revised cooling routing in the Hijet-and from 1996 the facelifted Rugger models adopted updated ECU calibration, creating minor software differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the right-side engine block near the oil filter housing (Daihatsu TIS A25107). The 8th digit of the VIN indicates engine family ('C' for CB series). Pre-1996 models have silver valve covers with black gasket seals; post-1996 units use black valve covers. Critical differentiation from CB 22: Original CB 90 has Denso ECU with 40-pin connector and 2.9L displacement, while CB 22 uses 2.2L. Service parts require production date verification—timing tensioners before 09/1995 are incompatible with later revisions due to internal redesign (Daihatsu SIB 96-NA-031).
The CB 90's primary reliability risk is timing chain rattle, with elevated incidence in urban stop-start driving with frequent short trips. Internal Daihatsu quality reports from 1995 indicated a significant share of pre-1996 engines required tensioner replacement before 100,000 km, while NHTSA field reports show drivability faults contributing to emissions-related failures. Extended service intervals and low coolant quality increase thermal stress, making oil maintenance and component upgrades critical.
Analysis derived from Daihatsu technical bulletins (1994–1998) and NHTSA field reports (1995–1997). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about DAIHATSU CB-90.
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