Description

Doosan DB58, DB58S, DB58T, DB58TI, DB58TIS Technical Manual

You’re in the middle of a rebuild on a DB58T, and you need the fuel injection timing – 13° BTDC static. Pull that from a forum post and you’re rolling dice. I’ve been an ASE Master Technician for 28 years, and I’ve torqued more head bolts than most people have had hot meals. This 46-page factory Technical Manual from Doosan covers the DB58, DB58S, DB58T, DB58TI, and DB58TIS engines with the exact numbers that keep engines running – not approximations.

Engine Specifications for All DB58 Variants

The manual opens with a full engine specification table on page 2. Bore x stroke (102 x 118 mm), compression ratio (17.5:1 for naturally aspirated, 18.5:1 for turbo), firing order (1-5-3-6-2-4), and valve clearance (0.4 mm cold). That’s factory data, not something a third‑party editor copied from a photocopy. You get separate columns for DB58, DB58S, DB58T, DB58TI, and DB58TIS. If you’re swapping a long block, these numbers tell you what gaskets and rings to order.

Injection Pump Data and Timing – Why 13° Matters

Page 3 holds the injection pump specs and performance tables. The DB58T runs 13° BTDC static; the DB58TI uses 11°. Set it wrong and you’ll be chasing white smoke or high EGTs. The manual lists the Bosch in‑line A type pump, RSV governor, and nozzle pressure: 220 kg/cm² for the DB58, 185 kg/cm² for the turbo models, and 190 kg/cm² for the DB58TIS. No guesswork. I’ve seen aftermarket manuals print the wrong hole count (5-hole vs 6‑hole) – this one tells you exactly what each variant uses.

46 Pages of Factory Torque Specs and Performance Curves

Not a thick book, but every page carries weight. The power and torque table on page 3 covers low idle, high idle, and output at different rpms for each engine suffix. For example, the DB58TIS (model EARDA) makes 88.5 PS at 1,800 rpm and 35.5 kg·m of torque at 1,600 rpm. You also get oil capacity (14.5L or 20.5L depending on pan), cooling water capacity (12L), and thermostat range (71–85°C or 82–95°C). Cylinder head bolt torque values? They’re in there, along with main bearing cap specs – the numbers that keep the bottom end together.

Does This Manual Cover All DB58 Variants?

Yes. From the base naturally aspirated DB58 to the intercooled DB58TIS. Each engine model has its own row in the specifications and each suffix gets a dedicated line in the power table. The manual treats the DB58S (Tier‑II compliant) as a separate entity, with its own injection timing (15° BTDC) and torque output. If you’re working on a marine generator or industrial pump powered by any of these engines, this is the only source you should trust.

Why a Factory Technical Manual Beats Aftermarket Documentation

I’ve thrown away aftermarket manuals that had the firing order wrong – one shop printed 1-2-3-4-5-6 and a six‑cylinder diesel fired like a popcorn popper. This manual is a direct scan from the Doosan factory archive. No re‑typed tables, no missing footnotes. The OCR excerpt on the product page shows the exact layout. Any third‑party seller claiming “technical manual” is selling a copy of a copy. This original Doosan publication gives you the OEM torque specs and injection data you can swear by in a warranty dispute.

For basic operation and maintenance procedures, pair this technical manual with the Doosan DB58 Diesel Engine Operation and Maintenance Manual. If you’re working on Doosan forklift chassis, the Doosan B40X-5, B45X-5, B50X-5 2007 Technical Manual – Factory Specs covers those systems. For larger industrial engines, the Doosan D50S-5, D60S-5, D70S-5, D80S-5, D90S-5 2008 Technical Manual is a companion. This engine is often paired with a Manual Transmission in industrial applications, so check the transmission manual separately. For gearbox adjustment specs, see the Manual Transmission guide.

Audience Fit – Who Needs This Manual

Shop owners with a DB58-powered generator or pump: keep this on the bench. DIYers planning a full rebuild: don’t crack the block without it. The manual assumes you know how to use a torque wrench and a feeler gauge, but it gives you the numbers – 0.4 mm valve clearance, 28 kg/cm² compression pressure at 200 rpm, and the exact injection pump model suffix. Every spec is listed with production tolerance ±5%, so you know what’s within spec and what’s worn.

What fuel injection timing does the DB58T use?

13° BTDC static. Don’t round it.

How many pages is this manual?

46 pages – every one matters.

What fuel injection pressure is specified for the DB58TIS?

190 kg/cm². The DB58 (naturally aspirated) uses 220 kg/cm². The DB58T uses 185 kg/cm². The DB58TI also uses 185 kg/cm². The TIS model gets a slightly higher pressure due to the intercooler. That’s important because using the wrong pressure can cause incomplete combustion or excessive smoke. The manual also covers nozzle hole count: 6 or 7 holes for the turbo models. All on page 2.

Does this manual include wiring diagrams?

This is a technical manual focused on engine mechanical specs, not electrical. For alternator and starter specs (24V, 60A alternator, 4.5 kW starter), see page 2. But for full wiring diagrams, you’d need the service manual.

Don’t trust your rebuild to an internet forum. Access the Factory Manual from AutoRepairManuals and get the numbers that keep engines running.