The Ford T8CB is a 1,597 cc, inline‑four naturally aspirated petrol engine produced between 1985 and 1991. It features a single overhead camshaft (SOHC), 8‑valve configuration and carburettor fuel delivery throughout its production. Output ranged from 59 kW (80 PS) to 66 kW (90 PS), with torque between 122–130 Nm, offering modest performance suited to light urban and suburban use.
Fitted primarily to the Ford Sierra and early Scorpio models, the T8CB was engineered for cost-effective reliability and ease of service in mid-size European sedans and estates. Emissions compliance was achieved through basic carburettor calibration and exhaust aftertreatment, meeting Euro 1 standards only in its final production year (1991) in select markets.
One documented concern is distributor drive wear leading to ignition timing drift, highlighted in Ford Technical Service Bulletin TSB‑87‑09‑12. This issue stems from inadequate lubrication of the distributor shaft bushing in high-mileage units, resulting in misfires and rough running. Later T8CB builds incorporated a revised oil feed passage to mitigate the problem.
Production years 1985–1990 predate EU emissions regulation; 1991 models meet Euro 1 standards in applicable markets (VCA UK Type Approval #VCA/EMS/7842).
The Ford T8CB is a 1,597 cc inline‑four naturally aspirated petrol engine engineered for mid-size sedans and estates (1985–1991). It combines SOHC valvetrain architecture with a single-barrel carburettor to deliver predictable, low-stress performance. Designed to meet Euro 1 emissions standards only in its final year, it prioritizes mechanical simplicity and serviceability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,597 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 80.0 mm × 79.5 mm | |
| Power output | 59–66 kW (80–90 PS) | |
| Torque | 122–130 Nm @ 3,000–3,500 rpm | |
| Fuel system | Single-barrel Weber or Ford carburettor | |
| Emissions standard | Pre-regulation (1985–1990); Euro 1 (1991) | |
| Compression ratio | 9.2:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain (front‑mounted) | |
| Oil type | SAE 10W‑40 (mineral or semi-synthetic) | |
| Dry weight | 122 kg |
The T8CB delivers predictable, low-stress performance ideal for daily commuting but requires periodic carburettor synchronization and distributor maintenance. Use of correct 10W‑40 oil and timely coolant changes are essential due to its cast-iron block and aluminium head construction. The front-mounted timing chain is generally durable but should be inspected after 160,000 km. Ignition timing drift from distributor wear is common in high-mileage examples—address per TSB‑87‑09‑12 with revised oil feed bushing.
Oil Specs: Requires SAE 10W‑40 mineral or semi-synthetic oil (Ford Owner’s Manual – Sierra 1.6). ACEA A2 specification recommended.
Emissions: Euro 1 certification applies to 1991 models only (VCA Type Approval #VCA/EMS/7842). Earlier models predate EU emissions regulation.
Power Ratings: Measured under EEC 80/1269 standards. 66 kW output applies to Scorpio GL variants only (Ford TIS Doc. FT8CB‑90).
Ford Technical Information System (TIS): Docs FT8CB‑85, FT8CB‑90
VCA Type Approval Database (VCA/EMS/7842)
EEC Directive 80/1269/EEC – Engine Power Measurement
The Ford T8CB was used across Ford's Sierra and early Scorpio platforms with longitudinal mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Scorpio saloon and updated carburettor jets in late Sierra variants—and from 1989 the facelifted Sierra adopted updated distributor housings, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the left side of the cylinder block near the distributor mount (Ford TIS FT8CB‑85). The 8th VIN digit indicates engine displacement ('6' for 1.6L). All T8CB units feature a single-barrel carburettor and black plastic distributor cap—distinct from fuel-injected CVH engines. Differentiate from Pinto 1.6L by SOHC head (Pinto is OHV).
The T8CB's primary reliability risk is distributor drive wear under high-mileage or neglected oil change conditions. Ford internal data from 1988 noted recurring ignition complaints in pre-1989 builds, while UK DVSA records show ignition system faults as a frequent MOT advisory item for surviving examples. Extended oil change intervals and stop-start driving accelerate bushing wear, making oil quality and distributor inspection critical.
Analysis derived from Ford technical bulletins (1985–1991) and UK DVSA failure statistics (2010–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FORD T8CB.
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Regulation (EC) No 715/2007
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