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L-134 Static Timing - CJ-2A

1. L 134 Static Timing Timing the L 134 is frequently an issue More often than not it is because the flywheel and or oil pump have been Install the installed incorrectly see Technical Distributor Details page 16 page 2 lt When installed incorrectly the factory procedures instructions for timing are Y INVALID Not to worry the engine can still be timed and will run fine This Adjust Breaker document will get you through the Point Gap process page 3 Snes penal The procedures here are independent of each other but must be done in the order Y shown ie skip over those you re already familiar with or have already Set Breaker accomplished Point Timing page 4 The first three are relatively simple Only the Spark Plug Wires step requires much mental effort or manual dexterity y Additional descriptions explanations are Route the Spark at the end of the document referenced Plug Wires from w in the flow charts page 10 lt AA start your engine o Page 1 L 134 Static Timing Crankshaft position is IRRELEVANT for this step The distributor will ONLY fit in ONE WAY see Technical Details page 16 Install the distributor The end of the oil pump shaft has an offset slot The end of the distributor shaft has an offset tab to match the oil pump offset slot Look down the distributor hole
2. does it start Yes success Yes go to page Other issues need resolved before timing Page 11 from L 134 Static Timing Alright the engine runs Now to determine how the oil pump amp flywheel are installed Draw a diagram of the distributor cap and cur mark each post with the corresponding spark plug wire AS YOU HAVE INSTALLED THEM If your plug wires aren t close to stock locations the oil pump was indexed improperly This is NO BIG DEAL it runs fine any way but KEEP YOUR CAP DRAWING for future reference WILLYS 4 1946 49 Manually turn the crank over until the timing marks are aligned in the window Remove the distributor cap Using YOUR cap drawing note which plug wire post the rotor is pointing at Flywheel is 180 off Use 2 spark plug for future timing reference pointing at or 4 plug reference Return to page 1 Flywheel is correct Use 1 spark plug for future timing Page 12 Run plug wires Right the 1st time method Begin Remove distributor cap Install rotor Remove 1 spark plug or ALL plugs for easiest cranking Set both throttle amp choke WIDE OPEN rotate crankshaft until TDC flywheel mark is lined up MAKE A DRAWING OF ROTOR POSITION L 134 Static Timing put thumb or finger over 1 spark plug hole quickly tur
3. audible signal goes silent Return to page 4 Page 6 Using a Feeler Gauge L 134 Static Timing Use a very thin feeler gauge 001 002 003 max If you don t have feeler gauges use a narrow strip of very thin plastic or paper cheapo generic sandwich baggies are only 001 002 thick Cigarette pack wrap is also very thin TURN IGNITION OFF or disconnect cable from battery are points closed y butor body Counter Clock ints fully close Yes v Manually open breaker points and gt insert feeler gauge between contacts y Apply slight pull on the feeler gauge y Rotate distributor body Clock Wise until feeler gauge just slips out under tension Return to page 4 Page 7 L 134 Static Timing Using Breaker Arc In the absense of ohm meter amp feeler gauge you can use the electrical system itself You look and or listen for an arc w in the breaker contacts Disconnect the condenser if it won t change the point gap Ensure a good ground path from distributor body to engine block if grounds are in doubt use a jumper wire from distributor body to a known good ground or battery negative terminal are points closed y Rotate distributor body Counter Clock Yes Wise until points are fully closed ip TURN IGNITION ON No Rotate distributor body Clock Wise
4. Note the position of the oil pump offset slot Remove the distributor cap Hold the distributor so the offset tab is aligned approximately the same as the oil pump slot Install the distributor in the block Turn the distributor shaft slightly back and forth until the offset tab drops into the oil pump slot Seat the distributor body flush to the block mating surface y Return to page 1 Page 2 L 134 Static Timing This page applies ONLY to OEM distributors with mechanical breaker points If you have an electronic distributor Pertronix Ignitor Crown distributor etc SKIP THIS PAGE Adjust breaker point gap If they re not already remove distributor cap amp rotor loosen distributor clamp Rotate distributor body approximately to the orientation shown at left Cap clips 3 amp 9 o clock Oiler 1 2 o clock Further rotate distributor body until points rubbing block is on highest corner of closest breaker cam lobe Snug hold down clamp finger tight Adjust breaker point gap to 020 Return to page 1 Page 3 L 134 Static Timing Set breaker point timing If they re not already remove distributor cap amp rotor loosen hold down clamp Align IGN or 5 flywheel timing mark in engine plate timing window Rotate distributor body to
5. approximately the correct orientation oiler 1 2 o clock cap clips 3 amp 9 o clock see photo on page 3 for example There are many ways to perform this see When do Points Open page 5 are points closed y rotate distrubutor body Counter Clock Wise until points are closed Yes rotate distributor body Clock Wise until points just barely open a tighten distributor hold down clamp Return to page 1 Page 4 i L 134 Static Timing When do the Points Open Pick a method Using a Using Feeler Breaker Using an Ohm Meter Gauge Points Arc Plug Spark Using a Page 5 Using an Ohm Meter L 134 Static Timing Use an ohm meter either on the lowest ohms scale or the continuity setting A meter with an audible continuity alarm works best Use leads w alligator clips if you have them TURN IGNITION OFF or disconnect cable from battery Disconnect the condenser if it won t change the point gap Clip one meter lead to the distributor input terminal Clip the other meter lead to to distributor body bare metal meter reading ZERO No y Rotate distributor body Counter Clock Wise until meter reads ZERO ohms or audible signal sounds off Yes Rotate distributor body Clock Wise until meter just reads INFINITE ohms or
6. until you SEE or HEAR the points arc TURN IGNITION OFF reconnect condenser Return to page 4 Page 8 Using a Plug Spark L 134 Static Timing Another way to use the electrical system itself generate a real spark Ensure a good ground path from distributor body to engine block if grounds are in doubt use a jumper wire on distributor body Insert a plug wire amp spark plug into the COIL SECONDARY TERMINAL Ensure the spark plug body is adequately grounded to conductive metal on the head block or some other convenient spot are points closed x Rotate distributor body Counter Clock Yes Wise until points are fully closed TURN IGNITION ON No Rotate distributor body Clock Wise until you SEE or HEAR a plug spark TURN IGNITION OFF Return to page 4 Page 9 L 134 Static Timing Pick a method Route spark plug wires See Who Needs This page 17 Quick amp Easy go to page 11 Get it right the first time goto page 13 Page 10 eee Run plug wires L 134 Static Timing Quick amp Easy method install rotor distributor cap amp spark plug wires Begin with ANY distributor cap post as long as firing order is correct 1 3 4 2 Counter Clock Wise ex booby CLIP WILLYS 4 1946 49 Y re clock plug wires 90 CCW
7. firing order If you KNOW or SUSPECT that either flywheel or oil pump are NOT correct you have 2 choices e re install them per the factory manual labor intesive and NOT necessary or e live with them as is just do what it takes to get the engine running There are 2 ways to do what it takes to get the engine running 1 The quick amp easy way FIRST get it running THEN figure out the details This is a Trial and Error approach The plug wires can only be installed 4 possible ways ONE of them WILL be correct You just have to try each possible orientation in turn until you hit upon the correct one You run the risk of having it wrong to begin with and getting backfire but You DO NOT NEED TO KNOW e if the flywheel is on right or wrong e if the oil pump has been indexed correctly e what cylinder is on the compression stroke 2 the get it right the first time way FIRST figure out the details THEN get it running The Get It Right The First Time way is a methodical approach It takes more time but there s no trial and error involved it is right on the first time You WILL first determine which cylinder is on a compression or power stroke After using either method above you ll have all the answers to the Flywheel Oil Pump and Spark Plug Wiring questions Page 17
8. he TDC timing marks apply to 2 amp 3 cylinders The oil pump drives the DISTRIBUTOR in many modern engines it s the opposite the distributor drives the oil pump The oil pump gear has 12 teeth so it can mesh with the camshaft gear in ANY ONE of 12 positions But due to an offset slot the distributor ONLY FITS THE OIL PUMP ONE WAY When the oil pump is installed according to factory procedure the 1 spark plug wire fits the distributor cap at about the 5 o clock position When the oil pump is installed WITHOUT regard to the factory procedure then the 1 spark plug wire can end up at ANY ONE OF THE OTHER 11 WRONG POSITIONS NEITHER OF THE ABOVE prevents the engine from running If either flywheel or oil pump is installed off spec it simply means you CANNOT use the written procedures in the factory service manuals You just have to determine how your engine assembly differs from factory standard make a note of the difference and keep it for future reference Page 16 L 134 Static Timing milo Nesds This This document is intended for those situations when the flywheel and or oil pump installation are UNKNOWN SUSPECT or KNOWN TO BE WRONG If you KNOW FOR A FACT that your flywheel is been installed correctly and your oil pump has been indexed correctly this document is not needed Just run your plug wires according to the service manual illustrations 1 wire at 4 5 o clock position 1 3 4 2 CCW
9. n crankshaft about 90 clockwise viewed from front feel suction T Discard any previous rotor drawing Flywheel correct Flywheel wrong 180 off Rotate the crankshaft the remaining 270 until TDC marks line up again feel pressure ji goto Other issues page need to be 14 resolved first Page 13 L 134 Static Timing page You arrived here because you felt suction at the 1 spark plug hole That means 1 cylinder is ON the Power stroke and has just gone past TDC on the Compression stroke You had previously MADE A DRAWING of where the distributor rotor was pointing at the time Now MAKE A NOTE on that drawing That distributor cap location is where 1 spark plug wire goes AA Install the distributor cap M AA Put 1 plug wire in the POST POINTED AT BY YOUR ROTOR DRAWING xX Install the remaining plug wires 3 4 2 order Counter Clock Wise If your plug wires aren t close to stock locations the oil pump was not indexed according to the manual This is NO BIG DEAL it runs fine any way but KEEP A DRAWING OF YOUR CAP amp WIRES for future reference WILLYS 4 Return to Page 14 1946 49 page 1 L 134 Static Timing page You arrived here because you felt pressure at the 1 spark plug hole That means 1 cylinder is ON the Compression stroke and 2 c
10. ylinder has just gone past its own TDC compression and is now on it s power stroke You had previously MADE A DRAWING of where the distributor rotor was pointing at the time Now MAKE A NOTE on that drawing That distributor cap location is where 2 spark plug wire goes x Install the distributor cap M AA Put 2 plug wire in the POST POINTED AT BY YOUR ROTOR DRAWING y Install the remaining plug wires 1 3 4 order Counter Clock Wise If your plug wires aren t close to stock locations the oil pump was not indexed according to the manual This is NO BIG DEAL it runs fine any way but KEEP A DRAWING OF YOUR CAP amp WIRES for future reference WILLYS 4 Return to Page 15 1946 49 page 1 L 134 Static Timing Technical Details Unlike contemporary engines the L 134 has two mechanical idiosyncracies that can cause confusion if parts are not installed according to the manual during engine rebuild or parts replacement The timing marks are on the FLYWHEEL not the front pully as on most modern engines so flywheel mounting determines which cylinder can be used with a timing light The flywheel can be mounted to the crankshaft in 2 opposite orientations 1 Correctly according to factory procedure In this case the TDC timing marks apply to 1 amp 4 cylinders as per the factory manual 2 Incorrectly NOT according to factory procedure In this case t

L-134 Static Timing - CJ-2A

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