Description

Mitsubishi 4G1, 4G15 1995 Workshop Manual – Factory OEM, Not Aftermarket

You are rebuilding a 4G15 in your bay, and the aftermarket manual says “torque to spec” without giving you the spec. That’s a leak waiting to happen. This 1995 Mitsubishi 4G1, 4G15 1995 Workshop Manual is the factory print – 99 pages of Mitsubishi’s own data, not a third-party guess. I’ve torqued head bolts on these engines since the 90s, and I won’t touch a 4G1 without this PDF on the tablet. It covers the 4G13 and 4G15 engines, both 12-valve carburetor and MPI variants. You get the exact tightening method for bolts that go into the plastic area – a procedure most DIYers mess up because they skip the new method section. Page 1 starts the general information, and by page 5 you have the engine specs: bore 71.0 mm, stroke 82.0 mm, compression ratio 9.5. This is the stuff you need before you pull the Cylinder head.

Engine Overhaul Coverage: What the TOC Tells You

The table of contents lays out 12 major sections. Starting with Specifications – service specs, rework dimensions, and the full Torque table. Then Special Tools (section 2) tells you exactly which Mitsubishi tools you need for the timing belt tensioner and camshaft sprocket. Section 3 is alternator and ignition system. Section 4 covers the Timing Belt – critical because a slipped belt on a 4G15 bends valves instantly. Section 5 is the Fuel and emission control system, including the carburetor adjustments for the 4G13. I’ve used this manual to diagnose a no-start on a 4G15 Colt – the fuel system schematics are factory accurate, unlike the generic wiring diagrams you find online. Section 6 covers water pump and water hose. Section 7 intake and exhaust manifold. Section 8 rocker arms and Camshaft. Section 9 – Cylinder head and valves. Section 10 oil pump and oil pan. Section 11 piston and connecting rod. Section 12 crankshaft, cylinder block. That’s everything top to bottom.

3 Reasons to Choose OEM Documentation Over Aftermarket Reprints

First, aftermarket manuals often copy the spec table but leave out the “new tightening method” note. The factory Workshop Manual includes a dedicated sub-section titled NEW TIGHTENING METHOD- BY USE OF BOLTS TO BE TIGHTENED IN PLASTIC AREA. If you miss that, you over-torque the bolts and strip the threads in the block. Second, the sealant and form-in-place gasket instructions are straight from the Mitsubishi engineering team. Third, the rework dimensions for cylinder bore and crank journals are listed exactly – you need those to order rings and bearings. No guesswork.

Does This Manual Cover the 4G15 MPI Specifically?

Yes. The manual covers both 4G13 and 4G15, including the 4G15 MPI that came in the 1995 Mitsubishi Mirage and Colt. Section 5 gives the fuel injection system diagrams, including the Fuel pressure regulator and injector resistance specs. If you are swapping a 4G15 into a different chassis, you need the valve timing numbers from page 5: intake opens BTDC 19°, closes ABDC 43°; exhaust opens BBDC 60°, closes ATDC 8°. Those specs are not in a generic Chilton manual.

Who Should Buy This Manual?

Home garage mechanics who want to rebuild a 4G1 without taking the head to a machine shop. Also professional techs who need the OEM torque values for insurance documentation. Beginners – this manual assumes you have basic tools, but it walks you through the sequence. Section 9 (cylinder head and valves) includes the tightening order and steps for lapping valves. If you are a DIYer and you have never pulled a camshaft, read section 8 twice. The manual does not hold your hand, but it gives you every number you need. I’ve used it to set valve clearances on a 4G15 that had a tick – the specs are in the service specs table.

Source Validity: Why This PDF is the Real Deal

This is a direct scan of the Mitsubishi Motors Corporation document PWEE9520, dated November 1995. The copyright notice is on every page. It is not a reprint or a third-party compilation. You get the same manual that dealer techs used. I have seen shops waste billable hours because they used a PDF that had the wrong crankshaft torque spec – this one has the factory torque specifications in section 1. For more context on why OEM manuals matter, see the Automotive Industry Overview. And if you need additional references, check the Mitsubishi 4G1 Series Engine Service Manual for the same generation, or the Mitsubishi Engine 1992-1993 Service Manual for earlier variants. The Mitsubishi Engine 1992-1993 Service Manual – Section: 6G7 covers the V6 family if you work on those too.

FAQ – Common Questions About This Manual

Does this manual include torque specs for the cylinder head bolts?

Yes. The torque specifications section (page 11A-1-4) gives the values for head bolts, main bearing cap bolts, and connecting rod nuts. It also includes the plastic area tightening method which changes the sequence.

Is this manual usable on a 4G13 engine?

It covers both. The specifications page shows data for 4G13 12-valve carburetor and 4G15 MPI.

Can I use this manual for a 1996 Mitsubishi 4G15?

The manual is published November 1995. It covers the 4G15 engine platform up to that date. For 1996 engine changes, Mitsubishi may have issued a supplement. You should verify by comparing VIN and engine code.

What if the PDF has missing pages?

AutoRepairManuals scans each manual page by page. The 99 pages are all there. If you find a blank page, contact support – they will verify the original file.

This is the manual you need if you are serious about keeping a 4G1 engine running right. Factory data, factory torque, factory diagrams. Stop relying on site forums. Access the Factory Manual.