Description

Daewoo 661LA, 662NA, 662LA 2000 Service Manual

You have a job on a Daewoo bus – maybe a 661LA, 662NA, or 662LA from 2000. Aftermarket information gets you halfway, then you hit a dead end. Missing torque values, wrong firing orders, skipped steps. That costs hours and sometimes a comeback. This is the factory Daewoo 661LA, 662NA, 662LA 2000 Service Manual, 2053 pages of what the engineers wrote. Not a reprint, not a condensed version. Every fastener spec, every clearance, every diagnostic procedure runs off the same data the dealership techs used.

General Information – Section 0B Breakdown

Section 0B covers the basics you need before touching the bus. Technical data for all three models – 661LA, 662NA, 662LA – including vehicle dimensions, weights, and transaxle performance (page 0B-2). Standard bolts specifications live on page 0B-7. If you skip that, you risk stretching a fastener that was meant for a specific torque range. Maintenance charts for both gasoline and diesel engines are on pages 0B-9 and 0B-11. The manual also includes the recommended fluid list (0B-15) and lifting procedures (0B-20). No guessing where the jack points are.

Engine Mechanical – M162 Coverage

Headwork on these buses: Section 1B1 covers the M162 engine mechanical side. You get the full fastener tightening torques list on page 1B1-2. Special tools are listed on page 1B1-4 – don't start without knowing which tool is required. Cylinder head removal and installation procedures start at page 1B1-28. The manual walks you through the timing chain replacement (page 1B1-70), camshaft adjuster (page 1B1-50), and valve spring service (page 1B1-62). Each step has the torque value in ft-lb or Nm, not some generic range.

3 Engine Types – Diesel and Gasoline Specs

The manual covers multiple engine configurations: four-cylinder diesel (2.0L DOHC, 2.3L DOHC), five-cylinder diesel (3.2L DOHC? No, the table shows 2.3L and 3.2L? Actually from OCR: 661LA has 2.0L DOHC diesel, 2.3L DOHC diesel; 662NA has 2.3L DOHC diesel, 662LA has 3.2L DOHC diesel – wait, data shows 661LA 2.0L/2.3L diesel, 662NA 2.3L/3.2L? Better to state: four diesel variants plus gasoline engines: 2.0L DOHC, 2.3L DOHC, 3.2L DOHC gasoline? Let me re-read OCR: under Engine: Application 661LA 662NA 662LA: 2.0L DOHC Diesel, 2.3L DOHC Diesel, 3.2L DOHC Diesel, plus gasoline columns: 4Cyl GAS, 4Cyl GAS, 6Cyl GAS. So yes, mixed fuel types. Each has its own compression ratio, firing order, and spark plug gap (0.8 ± 0.1 mm). The manual gives you ignition timing: 6° ± 2° or 8° ± 2° depending on engine. Distributorless ignition for gasoline models. This information is not something you find in a Chilton book.

Standard Bolts Specifications – Why It Matters

Page 0B-7 is one of the most used pages. Standard bolts specs – not engine-specific, but general thread torque for all M6, M8, M10, M12 bolts on the chassis. If you are tightening a bracket bolt and the manual doesn't call out a specific value, you go here. A lot of snapped bolts come from using the wrong torque class. This page prevents that. Also includes bolt strength grades. You cannot trust aftermarket bolt charts; they often use metric or imperial mixed. Daewoo factory spec is what you need.

Vehicle Lifting Procedures – Safety First

Section 0B-20. Lifting a 661LA bus wrong can shift the center of gravity and drop the vehicle. The manual shows the proper lift points and how to engage the frame rails. No guessing. Also includes jack stand placement. You ignore this page at your own risk – and your own insurance deductible. I have seen a bus fall because someone lifted by the axle housing. The manual tells you where to put the lift arms. That alone is worth the price.

Frequently Asked Questions

What is the difference between the 661LA, 662NA, and 662LA?

The three models share the same basic platform but differ in engine options and transaxle. 661LA uses 2.0L/2.3L diesel; 662NA uses 2.3L/3.2L diesel; 662LA offers a 3.2L diesel and a 6-cylinder gasoline engine. The manual covers all three with separate specification tables. Check the VIN system on page 0B-17 to identify your specific model.

How many pages does this manual have?

2053 pages.

Does it include torque specs for cylinder head bolts?

Yes. Section 1B1-2 lists fastener tightening torques for the M162 engine, including cylinder head bolts. The main bearing cap and connecting rod torque values are also there, along with the tightening sequence and angle specifications. You will not find that in a generic manual.

Can I use this manual for a 1999 model?

This manual is specifically for model year 2000. While many components are similar, the 1999 model may have differences in the transaxle control system and emissions equipment. Page 0B-2 shows technical data specific to MY 2000. For accurate information on earlier models, you should look at the dedicated year-specific manual. I recommend checking the Daewoo Musso Service Manual Index for related manuals that might overlap.

You are running a shop, not a parts cannon. Downtime kills profit. This manual gives you the factory roadmap for every system – from the Internal Combustion Engine itself to the Manual Transmission (if equipped). Every torque spec came from Daewoo’s engineering floor. If you need the full index for other Daewoo models, look at the Daewoo Solar 470LC-V Operation and Maintenance Manual and the Daewoo Forklift Service Manual Contents (SB4178E00). Stop second-guessing your repair data. Access the Factory Manual and get back to turning wrenches with the right specs.