Honda1982–1988Technical specifications

TN Acty 0.6: Technical specifications

Workshop data for the 0.6-litre petrol (engine code EH). Covers engine, fluids, service and torques: the figures to check before a job or a parts order.

Common faults & fixes

Summary

Match the engine code (EH) to the vehicle before ordering parts or applying these figures.

Vehicle specifications

Overview

Make: Honda
Model: TN Acty
Years: 1982–1988
Fuel: Petrol
Engine code: EH

Performance & efficiency

Power: 22 kW (30 hp)
Engine size: 545 cc
Cylinders: 2 · OHC
Compression ratio: 8.8:1
Fuel system: Keihin

Fluids & capacities

Engine oil (with the filter): 2.8 litres

All 79 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	2/OHC
Capacity (Fiscal) cc	545 (541)
Compression ratio :1	8,8
Suitable for unleaded petrol	No
Minimum octane rating RON	98
Ignition system Description	Trans-i
Fuel system Make	Keihin
Fuel system Description	Carb-FJ

Ignition system

Ignition coil Make	Hitachi
Ignition coil supply voltage + with ballast V	12,0
Primary resistance Ohm	1,78-2,08
Secondary resistance Ohm	10800-11200
Distributor (ECM) Make	Hitachi

Firing order

The firing order for the Honda TN Acty 0.6 (1982–1988) is 1-2.

Firing order	1-2

Valve clearances

Valve clearances for the Honda TN Acty 0.6 (1982–1988) are 0,12-0,18 mm inlet and 0,17-0,23 mm exhaust, measured cold.

Valve clearance - INLET mm	0,12-0,18 cold
Valve clearance - EXHAUST mm	0,17-0,23 cold

Engine oil & fluids

Engine oil

The Honda TN Acty 0.6 (1982–1988) takes 2.8 litres of engine oil with the filter. The specified engine oil grade is SAE 10W-40 for moderate climates, with API/ACEA classification SF.

Manual gearbox

The manual gearbox has a listed capacity of 2.3 litres.

Coolant

The listed total cooling-system capacity is 5.0 litres.

Grades, filling conditions and capacities

Lubricants and capacities — complete reference
Engine oil options
Ambient temperature range	Moderate climate
Engine oil grade SAE	10W-40
Engine oil classification API/ACEA	SF
Engine with filter(s) litres	2.8
Other lubricants and capacities
Manual transmission litres	2.3
Cooling system - total capacity litres	5.0

Service & electrical

Ignition timing

Basic ignition timing for the Honda TN Acty 0.6 (1982–1988) is 17°±2° BTDC at 950 rpm.

Ignition timing	With vacuum
Ignition timing - basic BTDC °Engine/rpm	17±2/950

Battery

The Honda TN Acty 0.6 (1982–1988) uses a 12 V, 35 Ah battery (reserve capacity 40 minutes).

Battery V/RC(Ah)	12/40 (35)

Spark plugs

The Honda TN Acty 0.6 (1982–1988) uses Denso W20EXR-U spark plugs with a 0,85 mm electrode gap.

Spark plugs Original equipment	Denso
Spark plug Type	W20EXR-U
Electrode gap mm	0,85
Spark plugs Make	Autolite
Spark plug Type	63
Electrode gap mm	0,8
Spark plugs Make	Bosch
Spark plug Type	WR8DC
Electrode gap mm	0,9
Spark plugs Make	Champion
Spark plug Type	RN7YCC
Electrode gap mm	0,8
Spark plugs Make	NGK
Spark plug Type	BPR5EY
Electrode gap mm	0,9

Tuning and emissions

Ignition advance	Without vacuum and basic timing
Ignition advance checks °Engine/rpm	0-4/1400
Ignition advance checks °Engine/rpm	18-22/2600
Ignition advance checks °Engine/rpm	28-32/5500
Vacuum check	Ignition timing advances
Vacuum range °Engine	14-16
Vacuum starts mbar	113
Vacuum ends mbar	306
Idle speed rpm	950±100
Fast idle speed - MT/AT rpm	2700-3700
Oil temperature °C	60
CO level at idle speed - tailpipe Vol. % CO	0,5-3,0
HC level at idle speed ppm	300
CO2 level at idle speed Vol. % CO2	13-16
O2 level at idle speed Vol. % O2	0,5-2,0

Starting and charging

Starter motor Make	Hitachi
Starter motor Type	0,6 kW
Minimum starting voltage V	8
Maximum cranking amps A	95-116
Alternator Make	Hitachi
Alternator output A/V/rpm	40/14/4000
Regulated voltage V	13,5-14,5

Service checks and adjustments

Compression pressure bar	5,9-7,8
Radiator cap bar	0,75-1,05
Thermostat opens °C	80-84
Drive belt tension - alternator/PAS/AC mm	11-16

Fuel system

Fuel pump delivery pressure bar	0,07-0,14

Tightening torques

Cylinder head bolt torque

The cylinder head bolts on the Honda TN Acty 0.6 (1982–1988) are tightened in 3 stages: 20 Nm, then 40 Nm, then a final 60 Nm.

Cylinder head
Tighten	20 Nm
Tighten	40 Nm
Tighten	60 Nm

Other engine tightening torques
Cylinder head instructions	—
Main bearings Stage 1	20 Nm
Main bearings Stage 2	40 Nm
Big end bearings Stage 1	14 Nm
Big end bearings Stage 2	29 Nm
Flywheel/driveplate	71 Nm
Crankshaft pulley/damper centre bolt	70 Nm
Spark plugs	23 Nm
Chassis tightening torques
Rear hub	200 Nm
Road wheels	65 Nm

Frequently asked questions

What is the firing order of the Honda TN Acty 0.6?

The firing order for the Honda TN Acty 0.6 (1982–1988) is 1-2.

What spark plugs does the Honda TN Acty 0.6 use?

The Honda TN Acty 0.6 (1982–1988) uses Denso W20EXR-U spark plugs with a 0,85 mm electrode gap.

How much oil does the Honda TN Acty 0.6 take?

The Honda TN Acty 0.6 (1982–1988) takes 2.8 litres of engine oil with the filter. The specified engine oil grade is SAE 10W-40 for moderate climates, with API/ACEA classification SF.

What are the valve clearances for the Honda TN Acty 0.6?

Valve clearances for the Honda TN Acty 0.6 (1982–1988) are 0,12-0,18 mm inlet and 0,17-0,23 mm exhaust, measured cold.

What is the cylinder head torque for the Honda TN Acty 0.6?

The cylinder head bolts on the Honda TN Acty 0.6 (1982–1988) are tightened in 3 stages: 20 Nm, then 40 Nm, then a final 60 Nm.

What is the ignition timing for the Honda TN Acty 0.6?

Basic ignition timing for the Honda TN Acty 0.6 (1982–1988) is 17°±2° BTDC at 950 rpm.