Description

Great WALL 4G64S4M Service Manual – OEM Factory Specs for the 4G64 Engine

I’ve lost count of how many engines I’ve seen ruined because a tech grabbed a torque chart off some forum and thought “close enough” was good enough. That crap doesn’t fly on a 4G64S4M. This Great WALL 4G64S4M Service Manual is the factory-issued document – not a reprint, not a scan from a third-party shop. It’s 72 pages of the exact specs Great Wall used when they built the engine. If you’re pulling the oil pan or torquing the main bearing caps, this is the only source you should trust.

Torque Specs on Page 00-6 – Don’t Guess

Page 00-6 lists the tightening torque for every critical fastener on the engine. I don’t care if you think you have a feel for it – the difference between 85 ft·lb and 90 ft·lb on a head bolt can mean a blown head gasket or a pulled thread. The manual gives values in N·m; I keep a conversion chart on my box so I can work in ft·lb. You should too. This isn’t a suggestion – it’s a requirement. Aftermarket “generic” torque charts have killed more engines than bad gas.

Sealant (FIPG) Application – Page 00-7

Page 00-7 covers where to apply sealant and what type – FIPG (Form-In-Place Gasket) specified by Great Wall. I’ve watched guys slap RTV on an oil pan rail and wonder why it leaks. The manual marks every sealant point with specific icons: oil pan, timing chain cover, etc. Use the wrong sealant or skip a spot and you’ll be pulling the pan again. Follow the manual, not your habit.

Read the Manual Before You Touch the Engine – Guide on Using the Manual

The opening section (page 00-3) explains how to read the diagrams: profile plots show component locations, numbered steps correspond to disassembly, and the marks for lubricant, sealant, and adhesive are clearly labeled. I know some guys skip intros, but this one tells you which parts are one-time-use (marked with a dot) and which need special tools. If you ignore it, you’ll miss the note that the oil filter screen washer must be replaced every time. That’s the kind of detail that separates a rebuild that lasts from one that leaks.

Engine Section (11) – What’s Actually Covered

The engine section covers the 4G64S4M from the oil filter to the overflow valve. The dismantle steps on page 00-4 list every part in the oil pump assembly: inner and outer rotors, overflow valve spring, core, plug – all with reference numbers. No guesswork about which way the rotor faces. The manual also shows the assembly steps in the correct order. If you’ve ever mixed up the inner and outer rotor orientation because some YouTube video said “it doesn’t matter,” this manual will set you straight.

Source Authenticity – Factory OEM vs. Aftermarket

This manual is the real deal – printed by Great Wall, not compiled by a third-party publisher. I’ve seen aftermarket manuals that list a different oil filter or skip the overflow valve torque. This one doesn’t. The preface states it contains the latest specs up to the printing date. When you need to know the charge pressure or the clearance for the oil pump rotors, you get the factory number, not a guess. For related models, check out Great Wall HOVER Service Manual – Section: Introduction”>Great Wall HOVER Service Manual – Section: Introduction or the Great Wall Deer Sailor So Cool Safe Sing Pegasus Service Manual – Section: Intro”>Great Wall Deer Sailor So Cool Safe Sing Pegasus Service Manual – Section: Intro if you’re working on those platforms. For engine-specific spares, see the Great Wall Hover Engine Spare Parts Manual”>Great Wall Hover Engine Spare Parts Manual.

Who Should Use This Manual

If you’re a DIY mechanic working in your garage on a Great Wall 4G64S4M swap or rebuilding one, this manual will save you from buying the same gasket twice. It’s dense – no fluff, no filler – but every page matters. Professionals will appreciate having the exact factory procedure instead of relying on memory. Beginners need to read the guide section first and get a torque wrench. The manual doesn’t hold your hand, but it gives you the data you need to do the job right.

For broader context on why OEM manuals matter in the automotive industry, see this Automotive Industry Overview”>Automotive Industry Overview. If you’re also working on transmissions, the Manual Transmission”>Manual Transmission section from Great Wall’s library applies to many of their older platforms.

Does this manual include wiring diagrams for the 4G64S4M?

No. This is a gasoline engine service manual covering mechanical and lubrication systems. Electrical diagnosis requires a separate wiring manual.

Are the torque values in ft·lb or N·m?

N·m. Convert using a standard chart. I keep one magnetized to my toolbox. Page 00-6 lists every fastener – main bearing, connecting rod, oil pump, oil pan. Use it.

This is the manual that belongs on your bench, not buried in a PDF folder. Access the Factory Manual and get the spec data Great Wall intended for this engine. No aftermarket guessing, no reprints – just the original OEM service information.