Question about 1994 Isuzu Rodeo

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Is there a special procedure for removing the harmonic balancer? i've tried several times using different methods to no avail. is the main bolt reverse threaded? tools used so far are a breaker bar, a large ratchet, and an impact wrench. ( not sure if the compressor used had enough working pressure for the job it only had a 21 gal. capacity ).

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The retaining bolt comes off in counter clockwise turn, they most likely used lock tight when it was installed and it is installed at probably 1200 lbs torque. the 21 gal compressor most likely doesn't have the power needed to remove that bolt. Once the bolt is removed you need the special tool to remove that balancer, it is a 3 leg pulley puller with a center insert that sits in the same hole that bolt comes out of and the pulley puller applies pressure to that insert while pulling the pulley off.

Posted on Mar 19, 2011

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I have removed several of the harmonic balancer bolts, and it is difficult to hold the harmonic balancer from spinning when you remove the bolt. The bolt is normal thread, and removal is counterclockwise. There is a Honda holding tool you can get, or possibly borrow from a autoparts store. I always use either an impact wrench or a long breaker bar, and hold the harmonic balancer from rotating with a chain style wrench. I use an old belt to keep from damaging the damper pulley.
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How to change a harmonic balance


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Where is the crankshaft sensor on a 3.8L in a 97 buick lesaber


Hi,
The sensor is located to the right of the crankshaft behind the vibration dampner (harmonic balancer). You will need a balancer puller and a special tool to space the new sensor correctly.
(can be done also with eye spacing, but the tool is recommended to ensure proper spacing as to prevent damage to new sensor and / or harmonic balancer.) You will also need a strap wrench to hold balancer pulley in place while removing and re-installing balancer to crankshaft bolt. (helper required)

Procedure for replacement:
Remove negative battery cable.
Set parking (emergency) brake.
Release tension on serpentine drive belt and remove belt from harmonic balancer pulley. ( large pulley at bottom of engine)
Break loose lug nuts on passenger side front tire, do not remove bolts yet.
Raise and support vehicle on passenger side, remove wheel.
Remove plastic splash guard (cover) from passenger side wheel well.
Remove dampner / balancer center retaining bolt (counterclockwise, it is torqued very tight.) Use a strap wrench around pulley and have a helper hold that in place while using a 1/2" breaker bar and socket to turn pulley bolt out of crankshaft. Be careful not to rotate engine in a counterclockwise direction while breaking the bolt loose.
Using balancer puller, remove dampner / balancer pulley from engine.
You will now see the crank sensor to the right of the crankshaft bolted to the timing cover.
Disconnect sensor wiring and remove retaining bolts, remove sensor.
Put new sensor in place and screw in bolts, do not tighten them yet.
Reconnect wiring to sensor.
Now use special tool to properly space sensor. If you cannot find one at the parts store, you can space the sensor with the balancer pully held in place (not installed yet) and space the sensor evenly with the veins on the hub of the balancer pulley. Take your time and be sure it is as evenly spaced as possible.
Tighten sensor bolts.
Clean balancer hub free of any oil and dirt deposits using brake or carbeurator cleaner.
Reinstall balancer to crankshaft by tapping around the inner surface of pulley with a rubber hammer.
It is a press fit, so be sure you have it started evenly and progress slowly in a circular motion to ensure you are keeping it aligned straight with the crankshaft.
Reinstall balancer bolt using the same method as removal, torque bolt to 110 foot pounds, then tap around balancer again twice with rubber hammer, turn the engine 2 full revolutions clockwise using the balancer to crankshaft bolt, then tighten bolt an additional 1/4 turn.
Replace splash guard, put wheel on tightening lugs to finger tight and then wrench tight in a star pattern.
Lower vehicle until wheel makes contact with floor, tighten lug nuts to 115 foot pounds in a star pattern using a torque wrench.
Fully lower vehicle, remove jack.
Re-install serpentine drive belt
Re-connect negative battery cable.

End of procedure....Hope that helps!.....Mike

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3 Answers

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You remove the giant bolt, then you use a harmonic balancer puller, which essentially bolts up rather than using claws to grab. The bolts of the puller go into the pulley fastening bolt holes.

Something must happen to protect the crank threads, a spacer, using the retainer bolt, or whatever, just do not kill the threads.

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1 Answer

Crankshaft Position Sensor and Camshaft Position Sensor


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  7. Sensor electrical connector.
  8. Foreign object deflector.
  9. Sensor and pedestal from block face.
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INSTALL OR CONNECT:

  1. Loosely install the crankshaft sensor on the pedestal.
  2. Position the sensor with pedestal attached on special Tool J 37089.
  3. Position the special tool on the crankshaft.
  4. Bolts to hold the pedestal to the block face, torque to 20-40 Nm (14-28 lb.ft).
  5. Torque the pedestal pinch bolt to 3-4 Nm (38-40 lb.in).
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  3. Electrical connector.
  4. Inner fender shield.
  5. Tire and wheel assembly, torque to 140 Nm (104 lb.ft).
  6. Lower the vehicle.
  7. Serpentine belt.

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There is a panel inside the wheel well that you can take off that gives you perfect access to the harmonic balancer. A special tool is required. i had my dad make one because he has access to whatever he needs at the factory. but you can get them at the dealer. i have no clue how much they cost. I can't see any way of doing it without the special tool. after you get the tool its pretty simple to get off. it takes alot of force to break the bolt loose though. i used the handle off my jack as a cheater bar. hope this helps...

Jan 08, 2009 | 2000 Mitsubishi Eclipse

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