Description

Daewoo G50S-2, G60S-2, G70S-2 2002 Service Manual: The Only Specs You Should Trust

You’ve got a Daewoo G50S-2, G60S-2, or G70S-2 on the lift. If you’re reaching for an aftermarket PDF to find the camshaft end play or the LP converter pressure, you’re asking for a comeback. I’ve seen too many jobs go sideways because somebody trusted a third-party spec sheet. This 2002 Daewoo G50S-2, G60S-2, G70S-2 2002 Service Manual is the actual factory document – 478 pages of what the engineers wrote, not what some parts jockey guessed. It covers the GM 4.3L V6 LPG engine that lives in these buses, and it doesn’t leave anything to chance.

Camshaft and Cylinder Head Specs – Direct from Factory

The Camshaft and Cylinder heads are where most of the problems hide. This manual lays out the valve clearance specs, the camshaft bearing tolerances, and the exact tightening sequence for the cylinder head bolts. The index lists “Camshaft” and “Cylinder Heads” under Specifications – that’s where you’ll find the numbers that matter. I’ve watched guys try to reuse head bolts because some online source said it was fine. This manual tells you when to replace them and at what torque. The fastener tightening table alone is worth the price of admission.

Does This Manual Cover the LP Fuel System?

It does. The Liquid Petroleum fuel system has its own section under Systems Operation. It goes through the LP Converter, the Carburetor, the Electric Fuelock, and the LP Relief Valve. I’ve seen a bad LP governor cause a bus to stall in traffic – this manual gives you the testing procedures to catch that before it leaves the shop. The Testing and Adjusting chapter includes something called “Outer Fuel System Leak Check” and “Inner Fuel System Leak Check.” If you’ve ever chased a propane smell that turned out to be a cracked fuelock diaphragm, you know why that matters.

Check the Flywheel Face Runout Before Assembly

Page 2 of this manual has the safety warnings – block the machine, lift properly, wear glasses. But the part I want you to circle is the flywheel face runout spec. It’s listed under Specifications with the flywheel housing tolerances. I’ve installed a flywheel that was .002″ out of spec and watched a transmission input shaft seal fail in 200 hours. Don’t skip that step. The manual also covers flywheel housing alignment and the torsional damper, which is critical on the GM V6.

478 Pages of Factory Data

That’s what you’re getting – not a summary, not a reprint from a third-party site. The complete Service Manual Contents include forms SB4089E00 through SB4096E00, covering the engine (SB2110E01, SB2111E00), power train, vehicle systems, and operation & maintenance. The Engine section alone has full disassembly and assembly for the GM 4.3L Vortec V6 LPG, including the balance shaft, timing chain, and pistons. Want to check the ignition sequence? The firing order is in the Specifications index. Need the charge pressure for the converter? It’s in the Liquid Petroleum Fuel System testing chapter. There’s even a section on the Delco Electronic Spark Timing Distributor – complete with pickup coil testing that most aftermarket manuals skip entirely.

Aftermarket manuals love to say “tighten to spec” without printing the actual number. This one prints every torque in imperial units, from the engine mount groups to the exhaust manifolds. If you’re working on a bus with the G50S-2 drivetrain and you’ve got one of those off-brand PDFs, toss it. This is the real deal. And if you need other factory documentation for similar Daewoo models, check the Daewoo Service Manual Contents SB4142E00 Nov 2004 for newer revisions, or the Daewoo Musso Service Manual – Factory OEM Specs for 1465-Page Workbench if you’re dealing with a passenger vehicle. There’s also the Daewoo 661LA, 662NA, 662LA 2000 Service Manual – Factory OEM for industrial forklifts. Outside of Daewoo, understanding the fundamentals of an Internal Combustion Engine is always helpful, and if you’re swapping transmissions, the Manual Transmission page has good context.

The last thing I’ll say – don’t treat the Safety section on page 2 like boilerplate. It explicitly says “use blocks or jack stands” and warns about lifting components over 50 lb. I’ve seen a bus drop on a guy because he thought a jack was enough. That page is part of the manual for a reason. Follow it.

You need this manual on your workbench. Access the Factory Manual and stop guessing.

FAQ

Is this manual the same as the OEM printed copy from 2002?

Yes. This is the exact PDF of the factory-issued service manual. It includes all forms and supplements listed in the contents. No missing pages, no condensed chapters.

Does it cover the G35S or G40S models?

No. Only G50S-2, G60S-2, G70S-2.