| TROUBLE | CAUSE | REMEDY |
|---|
| Motor misses | Worn piston rings | New oversize rings |
| Motor misses | Pitted valve seats | Grind in valve seats |
| Motor misses | Loose locknut, tappets | Adjust tappets |
| Motor misses | Gas. mixture too heavy | Adjust carburetor |
| Motor misses | Gas. mixture too thin | Adjust carburetor |
| Motor misses | Contact points worn | Adjust points |
| Motor misses | Loose cable connections | Connect to terminal posts |
| Motor misses | Cracked piston head | Replace piston |
| Motor misses | Cracked water jacket | Weld, rebore cylinder |
| Motor heats | Poor circulation | Flush out radiator |
| Motor heats | Insufficient lubrication | Clean oiling system |
| Motor heats | Excessive carbon deposit | See chapter on [Carbon Removing] |
| Motor heats | Cracked piston ring | Replace rings |
| Motor heats | Scored cylinder wall | Rebore cylinder |
| Motor heats | Tight main bearings | Lubricate plentifully |
| Motor heats | Heavy gas mixture | Adjust carburetor |
| Motor heats | Cylinders missing | See [Motor Misses] |
| Motor heats | Worn distributor contact spring | Replace spring on block |
| Motor back-fires | Lean mixture | Adjust carburetor |
| Motor back-fires | Valve open | Reseat valve, adj. tappet |
| Motor back-fires | Ignition off time | See [ignition systems] |
| Motor fails to start | Lack of gasoline | Fill tank |
| Motor fails to start | Vacuum in fuel tank | Open air hole in cap |
| Motor fails to start | Lack of current | Close circuit |
| Motor fails to start | Short circuit | Tape conductor at point |
| Motor fails to start | Discharged battery | Test with hydrometer; have recharged |
| Motor fails to start | Lack of fuel | Clean carburetor |
| Motor fails to start | Lack of fuel | Clean screen at fuel entrance to vacuum system |
| Motor fails to start | Lack of fuel | Clean pipe from vacuum system to carburetor |
| Motor fails to start | Ignition fouled | Clean corrosion from terminals |
| Motor fails to start | Breaker points stuck | Redress lightly with finger nail file |
| Motor fails to start | Plugs improperly set | Close points to thickness of a dime |
| Motor fails to start | Oil on points | Clean plugs and screw down tightly |
| Motor fails to start | Cracked porcelain | New plug |
| Motor fails to start | Open valves | Grind or reset valves |
| Motor fails to start | Valves stuck | Polish stems |
| Motor fails to start | Weak valve springs | Replace springs |
| Motor fails to start | Open circuit | Close switch |
| Motor misses | Defective spark plug | Replace |
| Motor misses | Disconnected wires | Connect up tightly |
| Motor misses | Dirty plugs | Clean |
| Motor misses | Poor compression | Replace gasket |
| New piston rings |
| Motor vibrates | Loose frame connection | Draw bolts down |
| Motor vibrates | Pistons sticking | Increase lubrication |
| Motor vibrates | Pistons weight uneven | Balance evenly |
| Motor vibrates | Defective spark plug | Clean, replace plug |
| Motor kicks | Preignition | Time ignition system |
| Motor kicks | Carbon, combustion chamber | Scrape out, burn out |
| Motor knock head | Wrist pin bearing loose | Give pin 1⁄4 turn |
| Motor knock head | Loose connecting rod | Tighten upper bearing |
| Motor knock head | Valve slap | Adjust tappet |
| Motor knock base | Connecting rod loose | Adjust remove shim |
| Motor knock base | Main bearing loose | Adjust remove shim |
| Motor rumble | Flywheel loose | Adjust reseat |
| Motor rumble | Fan bearing loose | Adjust grease |
| Motor tipping | Fan blade strikes radiator | Adjust bend blade |
| Motor tapping | Tappet worn | Adjust tighten lock nut |
| Motor compression poor | Thread stretch | Tighten head bolts |
| Motor compression poor | Gasket burned or blown | Replace, new gasket |
| Motor compression poor | Valve seat pitted | Grind, reset valve |
| Motor compression poor | Valve guide worn | Replace bushing |
| Motor compression poor | Valve stem warped | New valve |
| Motor compression poor | Piston rings lined up | Distribute openings |
| Motor compression poor | Cylinder wall scored | Oversize rings; rebore |
| Universal joint noise | Loose sleeve connection | Tighten flange bolts |
| Universal joint noise | Insufficient lubrication | Remove boot and pack with grease |
| Universal joint slap | Worn bushings | Turn bushings end for end |
| Universal joint slap | Worn trunion | New bushings |
| Differential noise | Dry | Fill with graphite grease or 600 W |
| Differential click | Chipped gear | Replace |
| Differential knock | Broken out tooth | Replace |
| Differential growl (steady) | Ring gear mesh too deep | Back up trifle on adjustment |
| Differential growl (uneven) | Ring gear mesh too loosely | Set up adjustment |
| Differential growl (uneven) | Axle shaft sprung | Retrue, replace |
| Differential growl (uneven) | Loose bearing retainer | Tighten nuts |
| Brakes fail to release | Rusted clevis joints | Lubricate with heavy grease |
| Brakes fail to release | Broken coil spring | Replace |
| Brakes fail to release | Stretched coil spring | Replace |
| Brake clatter | Loose adjustment | Adjust |
| Brake clatter | Worn lining | Reline the outer band |
| Brake clatter | Loose release spring | Adjust |
| Brake squeak | Dry lining | Four or five drops of oil |
| Brake squeak | Burned lining | Replace |
| Brakes fail to grip | Lining worn down to rivet heads | Replace |
| Brakes fail to grip | Overly lubricated | Wash with kerosene |
| Brakes fail to grip | Lining worn slick | Wash with kerosene and roughen with file |
| Brakes fail to grip | Lining burned hard | Replace |
| Brakes fail to grip | Stretched rivets | Draw down |
| Brake rod rattle | Worn clevis pin | Replace |
| Brake rod rattle | Spread clevis yoke | Drive ends together |
| Brake rod rattle | Loose lock-nut behind clevis | Tighten down |
| Brake rod rattle | Brake rods strike each other | Tape one rod at contact point |
| Brake rod rattle | Dry connections | Lubricate with small lump of grease |
| Torque rod rattle | Loose connections | Adjust |
| Torque rod rattle | Loose coil spring | Adjust |
| Emergency brake lever rattle | Loose joint bearing | Replace bushing |
| Emergency brake lever rattle | Worn plunger spring | Replace |
| Gear shift lever rattle | Worn ball socket | Lubricate with heavy grease |
| Gear shift lever rattle | Worn ball | Dent in socket with punch |
| Gear shift lever rattle | Worn alignment spring blades | Replace |
| Gear shift lever rattle | Worn bearing | Place thin washer at end of joint |
| Steering wheel play | Open mesh | Set up sector |
| Steering wheel play | Loose bearing | Turn down cone |
| Steering wheel play | Worn gear tooth | Take up on eccentric bushing |
| Steering wheel play | Loose drag link sockets | Turn in end plug |
| Steering wheel stiffness | Dry | Pack with grease |
| Radiator heats | Poor circulation | Flush radiator |
| Radiator heats | Jammed tubes | Remove jam and solder in new piece tube |
| Radiator heats | Sediment in bottom tank | Flush out with soda solution |
| Radiator heats | Stopped up overflow | Run wire through |
| Radiator freezes | Too much radiation | Cover bottom half of radiator with cardboard |
| Radiator freezes | Jammed tubes | Cut out section; solder in new piece |
| Radiator freezes | Sediment in bottom tank | Flush out with soda solution |
| Vacuum tank spouts gas | Dirt on vacuum valve seat | Clean valve |
| Vacuum tank overflows | Dirt on vacuum valve seat | Clean valve |
| Vacuum tank fails | Suction pipe from manifold stopped up | Clean pipe |
| Vacuum tank fails | Vacuum valve stuck | Clean valve |
| Vacuum tank fails | Entrance screen stopped up | Remove fuel line and clean screen |
| Vacuum tank fails | Loose connection at manifold | Tighten joint |
| Vacuum tank fails | Plugged fuel line | Run wire through |
| Carburetor wheeze | Choke valve out too far on dash | Push in after starting |
| Carburetor wheeze | Choke valve wire too short | Lengthen and adjust |
| Carburetor wheeze | Butterfly loose on air valve pivot | Adjust and tighten |
| Carburetor chokes | Dirty valve | Grind needle valves |
| Carburetor chokes | Sediment in bowl | Clean out bowl |
| Carburetor chokes | Heavy mixture | Open air valve slightly |
| Carburetor chokes | Water in gas | Clean out bowl |
| Carburetor snaps | Thin mixture | Cut down air |
| Carburetor snaps | Water in gas | Strain gas through chamois |
| Carburetor snaps | Dirt in fuel line | Run wire through |
| Carburetor snaps | Dirt under needle valve | Remove; clean seat |
| Carburetor overflows | Dirt on needle valve seat | Remove; clean seat |
| Carburetor overflows | Cork float (water-logged) | Dry in sun and shellac |
| Carburetor overflows | Metal float punctured | Punch hole opposite leak, blow out, solder both |
| Carburetor backfires | Worn intake valve bushing | Replace bushing |
| Carburetor backfires | Defective spark plug | Replace |
| Carburetor backfires | Pitted valve seat | Reseat |
| Magneto roar | Armature shaft bearings dry | Two drops of light oil in bearing well |
| Magneto click | Dry bearing | Two drops of light oil in bearing well |
| Magneto fires uneven | Breaker points out of adjustment | Adjust points |
| Magneto fires uneven | Open safety spark gap | Adjust gap to 1⁄16″ |
| Magneto fires uneven | Condensor short circuited | Take to service station |
| Magneto fires uneven | Distributor segments worn | Take to service station |
| Magneto fires uneven | Distributor brush worn | Take to service station |
| Magneto fires uneven | Distributor insulation cracked | Take to service station |
| Magneto fires uneven | Coil short circuited | Take to service station |
| Distributor arm wabbles | Worn center bushing | Replace bushing |
| Distributor fails | Spring blade broken in head | Replace blade |
| Distributor fails | Worn contact point in head | Cut down insulation |
| Distributor fails | Oil on contact block blade | Clean with kerosene |
| Distributor fails | Contact points welded | File smooth, adjust |
| Distributor fails | Loose on shaft | Reset and retime |
| Distributor fails | Coil shorted from dampness | Dry out thoroughly |
| Distributor fails | Punctured condensor | Replace |
| Distributor fails | Secondary wire short circuited | Replace or tape |
| Distributor fails | Secondary wire disconnected in switch | Connect to proper terminal |
| Starting motor fails | Corroded terminals | Clean and grease |
| Starting motor fails | Brush loose | Tighten and adjust to even contact |
| Starting motor fails | Terminal from battery short circuited to frame | Clean and tape |
| Starting motor fails | Starting switch short circuited | Cut off end of wire, make new connection |
| Starting motor fails | Bennidict spring broken | Replace |
| Starting motor fails | Battery discharged | Recharge battery |
| Generator fails to charge | Disconnected | Replace heavy wire |
| Generator fails to charge | Short circuit in cut-out switch | Make new connection |
| Generator fails to charge | Brush out of contact | Adjust contact |
| Generator noise | Dry bearings | Lubricate with light oil |
| Battery discharges too quickly | Plate short circuited | Take to service station |
| Battery discharges too quickly | Leaky cell | Take to service station |
| Battery discharges too quickly | Weak solution | Take to service station |
| Battery discharges too quickly | Deteriorated plates | Take to service station |
| Battery discharges too quickly | Dry plates | Cover plates with distilled water |
| Battery overcharges | Insufficient use of current | Burn lights and use starter frequently |
| Battery heats | Overcharging | Burn lights and use starter frequently |
| Horn fails | Wire short circuited | Replace or tape |
| Horn fails | Brush making poor contact | Adjust brush evenly |
| Horn fails | Brush making heavy contact | Adjust brush lightly |
| Horn fails | Drum too tightly adjusted | Adjust through funnel |
| Squeaks | Body loose on frame | Tighten four retainer bolts |
| Squeaks | Dry springs | Lubricate with graphite grease |
| Squeaks | Fuel tank loose | Tighten bands |
| Squeaks | Radiator loose | Tighten studs |
| Squeaks | Drip pan loose | Compress coil springs |
| Squeaks | Fender irons loose | Tighten bolts |
| Squeaks | Upper steering shaft bearing dry | Pack with heavy grease |
| Rattles | Loose spring alignment clamp | Bush and tighten |
| Rattles | Spread rod clevis open | Draw up ends and grease |
| Rattles | Demountable rim lugs loose | Draw up or replace |
| Rattles | Door hinge screws loose | Draw up |
| Rattles | Door lock worn | Bush slot |
| Lights jar out | Wires short circuited | Tape worn insulation |
| Lights jar out | Weak plunger spring in contact plug | Stretch spring |
| Lights fail | Poor contact | Remove wire and tape insulation |
| Lights fail | Poor contact | Remove plugs and adjust firmly in sockets |
| Lights dim | Globes carboned | Replace |
| Lights burn with black spot in center | Globe out of adjustment | Turn back into socket firmly |