US Parts Catalog · G503 · MB / GPW

Go-Devil engine

Assembly drawings with original part markings from ORD 9 SNL G-503.

← All diagram groups

Source: ORD 9 SNL G-503, 1949 release, Ford and Willys, ¼-ton 4×4. Marks and legends of the original catalog are preserved. The catalog also shows different versions; check the year and installed assembly before selecting a part. For CJ models, use their separate catalogs.

Cylinder block and crankshaft

Engine Block and Crankshaft - Original Drawing ORD 9 G503 with Parts Markings
Engine block and crankshaft · ORD 9 G503 · PDF page 13 · Open in catalog ↗

MB · related parts

Find the part in the MB catalog

The number opens the correct field in the Spare Parts List. The position label is overwritten where it is reliably legible; "assembly" means the whole assembly or part without a separate letter designation. Name substitutions and differences are explained with the section.

Pos.Part / name in existing listDesignation from drawing / sourceMB part number
BTiming Cover GasketCylinder block and crankshaftWO-630365Source · PDF 13 · Drawing ↑630365 ↗engine · MB
FCylinder Head GasketCylinder block and crankshaftWO-A8558Source · PDF 13 · Drawing ↑A 8558 ↗engine · MB
KCrankshaft Rear Cap PackingCylinder block and crankshaftWO-637790Source · PDF 13 · Drawing ↑637790 ↗engine · MB
LCrankshaft Bearing Rear StdCylinder block and crankshaftWO-645162Source · PDF 13 · Drawing ↑645162 ↗engine · MB
MCrankshaft Rear PackingCylinder block and crankshaftWO-637237Source · PDF 13 · Drawing ↑637237 ↗engine · MB
RCrankshaft Bearing Center StdCylinder block and crankshaftWO-645161Source · PDF 13 · Drawing ↑645161 ↗engine · MB
SCrankshaft Bearing Front StdCylinder block and crankshaftWO-645160Source · PDF 13 · Drawing ↑645160 ↗engine · MB
UCylinder Block Front GasketCylinder block and crankshaftWO-630359Source · PDF 13 · Drawing ↑630359 ↗engine · MB
ZCrankshaft Front PackingCylinder block and crankshaftWO 637098Source · PDF 13 · Drawing ↑637098 ↗engine · MB
KPiston Pin Lock ScrewCylinder block and crankshaftWO-632157Source · PDF 13 · Drawing ↑632157 ↗engine · MB
LCrankshaft AssyCylinder block and crankshaftWO-638121Source · PDF 13 · Drawing ↑638121 ↗engine · MB
SCrankshaft Oil SlingerCylinder block and crankshaftWO-375877Source · PDF 13 · Drawing ↑375877 ↗engine · MB
VCrankshaft Starting NutCylinder block and crankshaftWO-387633Source · PDF 13 · Drawing ↑387633 ↗engine · MB
—Crankshaft Oil SlingerCrankshaft, piston and connecting rodWO 375877Source · PDF 14 · Drawing ↑375877 ↗engine · MB
KPiston Pin Lock ScrewCrankshaft, piston and connecting rodWO-632157Source · PDF 14 · Drawing ↑632157 ↗engine · MB
LFlywheel Clutch Shaft BushingCrankshaft, piston and connecting rodWO-639578Source · PDF 14 · Drawing ↑639578 ↗engine · MB
MFlywheel Ring GearCrankshaft, piston and connecting rodWO-635394Source · PDF 14 · Drawing ↑635394 ↗engine · MB
GConnecting Rod BoltCrankshaft, piston and connecting rodWO-640070Source · PDF 14 · Drawing ↑640070 ↗engine · MB
HConnecting Rod #1 & 3Crankshaft, piston and connecting rodWO-640071Source · PDF 14 · Drawing ↑640071 ↗engine · MB
MPiston Pin StdCrankshaft, piston and connecting rodWO-636961Source · PDF 14 · Drawing ↑636961 ↗engine · MB
BValve Spring Inletcamshaft and timing chainWO-638636Source · PDF 15 · Drawing ↑638636 ↗engine · MB638636 ↗engine · MB
CValve Spring Retainercamshaft and timing chainWO-637044Source · PDF 15 · Drawing ↑637044 ↗engine · MB
DValve Spring Lock Inletcamshaft and timing chainWO-375994Source · PDF 15 · Drawing ↑375994 ↗engine · MB375994 ↗engine · MB
EValve Tappet Screw Exhaustcamshaft and timing chainWO-640020Source · PDF 15 · Drawing ↑640020 ↗engine · MB640020 ↗engine · MB
—Camshaftcamshaft and timing chainWO-637065Source · PDF 15 · Drawing ↑637065 ↗engine · MB
—Camshaft Bushingcamshaft and timing gearWO-645595Source · PDF 16 · Drawing ↑645595 ↗engine · MB
LValve Spring Inletcamshaft and timing gearWO-638636Source · PDF 16 · Drawing ↑638636 ↗engine · MB638636 ↗engine · MB
MValve Spring Retainercamshaft and timing gearWO-637044Source · PDF 16 · Drawing ↑637044 ↗engine · MB
NValve Spring Lock Inletcamshaft and timing gearWO-375994Source · PDF 16 · Drawing ↑375994 ↗engine · MB375994 ↗engine · MB
PValve Tappet Screw Exhaustcamshaft and timing gearWO-640020Source · PDF 16 · Drawing ↑640020 ↗engine · MB640020 ↗engine · MB
AOil Filter Inlet TubeOil filling and linesWO-A1197Source · PDF 18 · Drawing ↑A 1197 ↗engine · MB
MOil Filter Outlet TubeOil filling and linesWO-A1198Source · PDF 18 · Drawing ↑A 1198 ↗engine · MB
CValve Cover Screw GasketValve cover and ventilationWO-51875Source · PDF 19 · Drawing ↑51875 ↗engine · MB
BOil Pan GasketSump and oil intakeWO-639980Source · PDF 20 · Drawing ↑639980 ↗engine · MB
JOil Pan Drain PlugSump and oil intakeWO-639979Source · PDF 20 · Drawing ↑639979 ↗engine · MB
BExhaust To Intake GasketIntake and exhaust manifoldWO-634811Source · PDF 21 · Drawing ↑634811 ↗engine · MB
AHConnecting Rod #2 & 4Original overview of MB/GPW assembliesWO-640072Source · PDF 34 · Drawing ↑640072 ↗engine · MB
FManifold To Block GasketOriginal overview of MB/GPW assembliesWO-638640Source · PDF 44 · Drawing ↑Ford · GPW9448638640 ↗engine · MB
WFlywheel AssyOriginal overview of MB/GPW assembliesWO-A7503Source · PDF 30 · Drawing ↑Ford · GPW18289A 7503 ↗engine · MB
EPiston W/Pin StdOriginal overview of MB/GPW assembliesStandard piston with pin; does not represent repair measures pistons.WO-637041Source · PDF 11 · Drawing ↑637041 ↗engine · MB
ROil Pump Driven GearOriginal overview of MB/GPW assembliesWO-637425Source · PDF 39 · Drawing ↑Ford · GPW6610637425 ↗engine · MB
ZOil Pump Shaft & RotorOriginal overview of MB/GPW assembliesWO-636599Source · PDF 40 · Drawing ↑Ford · GPW6608636599 ↗engine · MB
AssemblyConnecting Rod Bearing StdCrankshaft, piston and connecting rodBearing of appropriate standard/overhaul size from MB table; the measure is confirmed in the original order. Assembly display does not mean that all measurements are interchangeable.WO-A7233Source · PDF 33 · Drawing ↑Ford · GPW18330AA 7233 ↗engine · MB
AssemblyConnecting Rod Bearing .010Crankshaft, piston and connecting rodBearing of appropriate standard/overhaul size from MB table; the measure is confirmed in the original order. Assembly display does not mean that all measurements are interchangeable.WO-A7234Source · PDF 33 · Drawing ↑Ford · GPW18330BA 7234 ↗engine · MB
AssemblyConnecting Rod Bearing .020Crankshaft, piston and connecting rodBearing of appropriate standard/overhaul size from MB table; the measure is confirmed in the original order. Assembly display does not mean that all measurements are interchangeable.WO-A7235Source · PDF 33 · Drawing ↑Ford · GPW18330CA 7235 ↗engine · MB
AssemblyConnecting Rod Bearing .030Crankshaft, piston and connecting rodBearing of appropriate standard/overhaul size from MB table; the measure is confirmed in the original order. Assembly display does not mean that all measurements are interchangeable.WO-A7236Source · PDF 33 · Drawing ↑A 7236 ↗engine · MB
AssemblyCrankshaft Bearing Front .010Cylinder block and crankshaftBearing of appropriate standard/overhaul size from MB table; the measure is confirmed in the original order. Assembly display does not mean that all measurements are interchangeable.WO-645163Source · PDF 27 · Drawing ↑645163 ↗engine · MB
AssemblyCrankshaft Bearing Front .020Cylinder block and crankshaftBearing of appropriate standard/overhaul size from MB table; the measure is confirmed in the original order. Assembly display does not mean that all measurements are interchangeable.WO-645166Source · PDF 28 · Drawing ↑645166 ↗engine · MB
AssemblyCrankshaft Bearing Front .030Cylinder block and crankshaftBearing of appropriate standard/overhaul size from MB table; the measure is confirmed in the original order. Assembly display does not mean that all measurements are interchangeable.WO-645169Source · PDF 28 · Drawing ↑645169 ↗engine · MB
AssemblyCrankshaft Bearing Center .010Cylinder block and crankshaftBearing of appropriate standard/overhaul size from MB table; the measure is confirmed in the original order. Assembly display does not mean that all measurements are interchangeable.WO-645164Source · PDF 26 · Drawing ↑645164 ↗engine · MB
AssemblyCrankshaft Bearing Center .020Cylinder block and crankshaftBearing of appropriate standard/overhaul size from MB table; the measure is confirmed in the original order. Assembly display does not mean that all measurements are interchangeable.WO-645167Source · PDF 26 · Drawing ↑645167 ↗engine · MB
AssemblyCrankshaft Bearing Center .030Cylinder block and crankshaftBearing of appropriate standard/overhaul size from MB table; the measure is confirmed in the original order. Assembly display does not mean that all measurements are interchangeable.WO-645170Source · PDF 27 · Drawing ↑645170 ↗engine · MB
AssemblyCrankshaft Bearing Rear .010Cylinder block and crankshaftBearing of appropriate standard/overhaul size from MB table; the measure is confirmed in the original order. Assembly display does not mean that all measurements are interchangeable.WO-645165Source · PDF 28 · Drawing ↑645165 ↗engine · MB
AssemblyCrankshaft Bearing Rear .020Cylinder block and crankshaftBearing of appropriate standard/overhaul size from MB table; the measure is confirmed in the original order. Assembly display does not mean that all measurements are interchangeable.WO-645168Source · PDF 29 · Drawing ↑645168 ↗engine · MB
AssemblyCrankshaft Bearing Rear .030Cylinder block and crankshaftBearing of appropriate standard/overhaul size from MB table; the measure is confirmed in the original order. Assembly display does not mean that all measurements are interchangeable.WO-645171Source · PDF 30 · Drawing ↑645171 ↗engine · MB
AssemblyCylinder Head Stud (As Req)Cylinder block and crankshaftThe number and description are confirmed in the original table. The picture shows the associated assembly; individual letter position is not reliably read.WO-349368Source · PDF 24 · Drawing ↑Ford · GPW6065349368 ↗engine · MB
AssemblyInlet ValveValve cover and ventilationThe number and description are confirmed in the original table. The picture shows the associated assembly; individual letter position is not reliably read.WO-637182Source · PDF 35 · Drawing ↑Ford · GPW6507637182 ↗engine · MB
AssemblyExhaust ValveValve cover and ventilationThe number and description are confirmed in the original table. The picture shows the associated assembly; individual letter position is not reliably read.WO-637183Source · PDF 35 · Drawing ↑Ford · GPW6505637183 ↗engine · MB
AssemblyValve Cover GasketValve cover and ventilationThe number and description are confirmed in the original table. The picture shows the associated assembly; individual letter position is not reliably read.WO-630305Source · PDF 35 · Drawing ↑Ford · GPW6521630305 ↗engine · MB
AssemblyTiming Chaincamshaft and timing chainThe number and description are confirmed in the original table. The picture shows the associated assembly; individual letter position is not reliably read.WO-638457Source · PDF 36 · Drawing ↑Ford · GPW6260638457 ↗engine · MB
AssemblyCamshaft Sprocketcamshaft and timing chainThe number and description are confirmed in the original table. The picture shows the associated assembly; individual letter position is not reliably read.WO-638458Source · PDF 38 · Drawing ↑Ford · GPW6256638458 ↗engine · MB
AssemblyCrankshaft Sprocketcamshaft and timing chainThe number and description are confirmed in the original table. The picture shows the associated assembly; individual letter position is not reliably read.WO-638459Source · PDF 38 · Drawing ↑638459 ↗engine · MB
AssemblyOil PanSump and oil intakeORD 9 lists A7238 as a replacement for the earlier A1167 crankcase. The display is an overview of the assembly. The number and description are confirmed in the original table. The picture shows the associated assembly; individual letter position is not reliably read.WO-A7238Source · PDF 43 · Drawing ↑Ford · GPW6675A 7238 ↗engine · MB
AssemblyOil FloatSump and oil intakeThe number and description are confirmed in the original table. The picture shows the associated assembly; individual letter position is not reliably read.WO-630396Source · PDF 42 · Drawing ↑Ford · GPW6615630396 ↗engine · MB
AssemblyEngine Insulator RearCylinder block and crankshaftThe number and description are confirmed in the original table. The picture shows the associated assembly; individual letter position is not reliably read.WO-A6156Source · PDF 23 · Drawing ↑Ford · GPW6040BA 6156 ↗engine · MB

The same PN in multiple places does not automatically validate each year, country or performance. The original data is preserved; note indicates the difference between the sources.

Crankshaft, piston and connecting rod

Crankshaft, piston and connecting rod - original drawing ORD 9 G503 with part markings
Crankshaft, piston and connecting rod · ORD 9 G503 · PDF page 14 · Open in catalog ↗

camshaft and timing chain

Camshaft and Timing - Original ORD 9 G503 Drawing with Parts Markings
camshaft and chain timing · ORD 9 G503 · PDF page 15 · Open in catalog ↗

camshaft and timing gear

Camshaft and Timing — Original ORD 9 G503 Drawing with Parts Markings
camshaft and timing gear · ORD 9 G503 · PDF page 16 · Open in catalog ↗

Oil pump variants

Oil Pump Variants - Original Drawing ORD 9 G503 with Parts Markings
Oil pump variants · ORD 9 G503 · PDF page 17 · Open in catalog ↗

Oil filling and lines

Oil Fill and Lines - Original Drawing ORD 9 G503 with Parts Markings
Oil filling and lines · ORD 9 G503 · PDF page 18 · Open in catalog ↗

Valve cover and ventilation

Valve Cover and Vent - Original Drawing ORD 9 G503 with Parts Markings
Valve cover and ventilation · ORD 9 G503 · PDF page 19 · Open in catalog ↗

Sump and oil intake

Sump and Oil Intake - Original Drawing ORD 9 G503 with Parts Markings
Sump and oil intake · ORD 9 G503 · PDF page 20 · Open in catalog ↗

Intake and exhaust manifold

Intake and Exhaust Manifold - ORD 9 G503 Original Drawing with Parts Markings
Intake and exhaust manifold · ORD 9 G503 · PDF page 21 · Open in catalog ↗
Original catalogs and service manual

ORD 9 SNL G-503 — Full Parts Catalog (PDF)

TM 10-1513 - Service Chapter for this assembly (PDF)

Page numbers with drawings indicate pages of the PDF file; printed numbering may vary. For the chassis, body and some equipment, an overview of the assembly is shown, according to the original catalog.

Original overview of MB/GPW assemblies

Original overview of MB/GPW assemblies
Original ORD 9 G503 · PDF 11 · linked assembly view.

Original overview of MB/GPW assemblies

Original overview of MB/GPW assemblies
Original ORD 9 G503 · PDF 12 · linked assembly view.