Ah, the Isuzu Trooper 6VD1, what a beautiful machine. Now, when it comes to the firing order, it's like painting a happy little tree. You'll want to follow this sequence: 1-2-3-4-5-6, starting from the front of the engine. Just remember to take your time and enjoy the process, my friend.
A popular choice for swapping a V6 engine into a 1998-99 Isuzu Trooper is the 3.4L GM V6 (also known as the 3400 or L35). This engine is compatible due to its similar mounting points and overall size, making it a feasible option for those looking to increase power while maintaining reliability. Additionally, the 3.2L Isuzu V6 (6VD1) is the original engine for the Trooper and can also be found in some Isuzu models, providing another option for replacements or upgrades.
If this is a 6VD1 engine, the camshaft position sensor will be located on the very back of the left bank head (on the inside, under the intake manifold). The easiest way to have it replaced or removed is to take off the intake manifold. The sensor is only secured with one 10mm bolt but it is a frustrating thing to put it back on with the intake installed, unless you have very slim hands.
Timing Belt Removal 1. Disconnect battery ground cable. 2. Remove air cleaner assembly. 3. Remove radiator upper fan shroud from radiator. 4. Move drive belt tensioner to loose side using wrench then remove drive belt. 850RW001 Legend (1) Crankshaft Pulley (2) Cooling Fan Pulley (3) Tensioner (4) Generator (5) Air Conditioner Compressor (6) Power Steering Oil Pump (7) Drive Belt 5. Remove cooling fan assembly four nuts, then the cooling fan assembly. 6. Remove cooling fan drive pulley assembly. 7. Remove idle pulley assembly. 8. Remove serpentine belt tensioner assembly. 9. Remove power steering pump assembly. 10. Remove crankshaft pulley assembly using J-8614-01 crankshaft holder, hold crankshaft pulley remove center bolt, then the pulley. 11. Remove right side timing belt cover then left side timing belt cover. 12. Remove lower timing belt cover 13. Remove pusher. CAUTION: The pusher prevents air from entering the oil chamber. Its rod must always be facing upward. 014RW011 Legend (1) Up Side (2) Down Side (3) Direction For Installation (4) Locking Pin 14. Remove timing belt. CAUTION: 1. Do not bend or twist the belt, otherwise its core could be damaged. The belt should not be bent at a radius less than 30 mm. 2. Do not allow oil or other chemical substances to come in contact with the belt. They will shorten the life. 3. Do not attempt to pry or stretch the belt with a screw driver or any other tool during installation. 4. Store timing belt in a cool and dark place. Never expose the belt direct sunlight or heat. 6A-28 ENGINE MECHANICAL (6VD1 3.2L) Installation NOTE: For correct belt installation, the letter on the belt must be able to be read as viewed from the front of the vehicle. 014RW005 Legend (1) Crankshaft Timing Pulley (2) RH Bank Camshaft Drive Gear Pulley (3) Water Pump Pulley (4) Idle Pulley (5) LH Bank Camshaft Drive Gear Pulley (6) Tension Pulley (7) Alignment Mark on Oil Pump. (8) Alignment Mark on Timing Belt 014RW006 Legend (1) Timing Belt (2) Engine Rotation Direction (3) Cylinder Head Side 1. Install timing belt. 1. Align groove of crankshaft timing pulley with mark on oil pump. Align the mark on the crankshaft timing pulley with alignment mark (white dots line) on the timing belt. Secure the belt with a double clip. NOTE: When timing marks are aligned, No.2 piston will be on Top Dead Center. 014RW003 Legend (1) Alignment Mark on Oil Pump (2) Groove on Crankshaft Timing Pulley (3) Alignment Mark on Crankshaft Timing Pulley (4) Alignment Mark on Timing Belt ENGINE MECHANICAL (6VD1 3.2L) 6A-29 2. Align the marks on the camshaft drive gear pulleys with the corresponding alignment marks on the cylinder head covers. 014RW004 Legend (1) Alignment Mark on Camshaft Drive Gear Pulley (2) Alignment Mark on Cylinder Head Cover. (3) Alignment Mark on Timing Belt (White Line) 3. Align the alignment mark (white line) on the timing belt with alignment mark on the RH bank camshaft drive gear pulley (on the left side as viewed from the front of the vehicle). Secure the belt with a double clip. 014RW008 4. Align the alignment mark (white line) on the timing belt with the alignment mark on the LH bank camshaft drive gear pulley. When aligning the timing marks, use a wrench to turn the camshaft drive gear pulley, then set the timing mark between timing belt and camshaft drive gear pulley. Secure the belt with a double clip. NOTE: It is recommended for easy installation that the belt be secured with a double clip after it is installed to each pulley. 014RW009 5. Install crankshaft pulley temporarily and tighten center bolt by hand (do not use a wrench). Turn the crankshaft pulley clockwise to give some belt slack between the crankshaft timing pulley and the RH bank camshaft drive gear pulley. 6A-30 ENGINE MECHANICAL (6VD1 3.2L) 2. Install pusher and tighten bolt to the specified torque. 1. Install the pusher while pushing the tension pulley to the belt. 2. Pull out pin from the pusher. NOTE: When reusing the pusher, press the pusher with approximately 100Kg to retract the rod, and insert a pin (1.4 mm piano wire). 014RW011 Legend (1) Up Side (2) Down Side (3) Direction for Installation (4) Locking Pin 3. Remove double clips from timing belt pulleys. Turn the crankshaft pulley clockwise by two turns. Torque : 25 N·m (18 lb ft) 3. Install timing belt cover. Remove crankshaft pulley that was installed in step 1 item 5. Tighten bolts to the specified torque. Torque: 19 N·m (14 lb ft) 020RW004 Legend (1) Timing Belt Cover RH (2) Timing Belt Cover LH (3) Timing Belt Cover Lower 020RW003 Legend (1) Timing Belt Cover (2) Rubber Bushing (3) Sealing Rubber (4) Cylinder Body 4. Install crankshaft pulley using J-8614-01, hold the crankshaft pulley and tighten center bolt to the specified torque. Torque : 167 N·m (123 lb ft)