I have a 91 honda accord. I was wondering what would be the right way I have to turn the bolt of the pulley on the crankshaft for my 91 honda accord? The reason I ask is because I was trying to replace the timing belt on this car and I took a airgun and it did not want to come out. I don't want to strip it or break it. If anyone knows any easier way let me know.
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Re: how do I loosen the bolt on crank shaft?
For your information my friend,Honda it doesn't matter what make is it,always the Crankshaft bolt is too hard to manage loosing it.Reason- the manufacturer is using quite lock tight on the bolt threads. On my behalf what I do when I have this situation. I take the car to my tire fitter who has the strongest air gun and request for assistance - after I remove all the covers underneath to give him good access - when bolt gets loose,I tight the bolt with an ordinary air gun just to get to my workshop and carry on.
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Disconnect the negative battery terminal. Using a ½-inch-drive ratchet and the 19 mm socket, turn the center bolt on the crankshaft so that number-one cylinder piston is at top dead center (TDC). You will know you ware at TDC when the mark on the crank is in alignment with the arrow on the timing cover.
Disconnect the cruise control connector and remove the cruise control actuator. Loosen the upper mounting bolt with the 14 mm socket. Use a 12 mm socket to loosen the lower nut then use a 10 mm socket to loosen the adjuster from the power steering pump and remove the belt.
Loosen the upper air conditioner mounting bolt using the 14 mm socket. Use the 12 mm socket to loosen the lower nut and adjusting bolt on the alternator and remove the alternator/AC belt. Remove the valve cover using a 10 mm socket.
Place the jack behind the left front wheel where the arrow is located indicating the jack location, and raise the vehicle. Put the jack stand under the subframe behind the jack, then lower the jack. Remove the left front wheel for easy access to the crank pulley. Using a block of wood atop the jack, place the jack under the oil pan and lift with slight pressure to hold the engine in place. Remove the side engine mount using a 17 mm deep socket.
Take off the dipstick, pipe tube and upper timing cover using a 10 mm socket. Then remove the timing belt adjuster rubber seal without loosening the adjuster nut. Take off the crankshaft pulley bolt. Use the chain wrench to hold the the crankshaft pulley while turning the crankshaft pulley bolt with a 19 mm socket. Use the 10 mm wrench and 10 mm socket to remove the bolts on the lower cover. Remove the lower cover and mark the location of the cam, crank and balancer shaft with Liquid Paper. Remove the balancer shaft belt and timing belt.
Install the timing belt and the balancer shaft belt in the reverse order of removing them. During Installation of the crank pulley, coat the threads of the crank pulley bolt with engine oil and tighten it to 159 foot-pounds. Finally, adjust the tension of the power steering and alternator belts as well.
Fig. 10: On all engines except VTEC, the belt adjuster arm must be locked in place using one of the lower cover mounting bolts
NOTE: There are two belts in this system; the one running to the camshaft pulley is the timing belt. The other, shorter one drives the balance shaft and is referred to as the balancer belt or timing balancer belt. Use a piece of chalk or a marker to place an identifying arrow on the belts. The arrow can identify the direction of rotation or the outer edge of the belts. The belts must be reinstalled so it moves in the same direction. Protect the belts from oil, coolant, etc. It's an even better idea to replace the belts at this point.
Loosen the timing belt adjustment nut. Push on the tensioner to relieve tension from the balancer belt, then tighten the nut. Remove the balancer belt.
On all models except Prelude with VTEC, loosen the lockbolt installed earlier and the adjusting nut. Push on the tensioner to release the timing belt, then tighten the nut. Carefully remove the timing belt. On Prelude VTEC models, remove the timing belt from the pulleys, then remove the bolts securing the auto-tensioner. Remove the auto-tensioner from the engine.
Check the position of the timing marks. The timing pointer must be perfectly aligned with the TDC (white mark) on the flywheel or flex-plate; the camshaft pulley must be aligned so that the word UP is at the top of the pulley and the marks on the edge of the pulley are aligned with the surfaces of the head. Additionally, the face of the front timing balancer pulley has a mark which must be aligned with the notch on the oil pump body. This pulley is the one to the left crank when viewed from the pulley end.
Fit the timing belt over the pulleys and tensioner. On DOHC engines without VTEC, remove the 5mm pin punches from behind the cam pulleys.
Except Prelude VTEC models:
Temporarily install the crank pulley and bolt.
Loosen the tensioner adjusting nut 1 turn, then tighten it. Rotate the crankshaft counterclockwise until the camshaft pulley has moved 3 teeth to create tension on the belt. Loosen the nut again, then tighten it to 33 ft. lbs. (45 Nm).
NOTE: Always rotate the crankshaft counterclockwise when viewed from the pulley end. Rotating it clockwise will cause improper adjustment and possible damage.
Tighten the lockbolt installed earlier to lock the timing belt adjuster arm. Remove the crank pulley.
On Prelude VTEC models:
Hold the auto-tensioner with the maintenance bolt facing up. Loosen and remove the bolt.
NOTE: Handle the tensioner carefully so the oil inside does not spill or leak. Replenish with clean engine oil if any does leak. Total capacity is 1⁄4 fl. oz. (8 ml).
Clamp the mounting flange of the tensioner in a vise using a cloth or blocks of wood to protect it. Insert a flat blade screwdriver into the maintenance hole. Place the stopper (tool number 14540-P13-003) or an equivalent clamp on the tensioner, then turn the screwdriver clockwise to compress the bottom. Be careful not to damage the threads or the gasket contact surface.
Install the maintenance bolt on the tensioner with a new gasket. Tighten to 6 ft. lbs. (8 Nm).
Make sure no oil is leaking from around the maintenance bolt, then install the tensioner on the engine. Make sure the stopper stays in place and tighten the bolts to 16 ft. lbs. (22 Nm).
Remove the stopper.
Fig. 11: On VTEC engines, the tensioner must be compressed before installing it on the engine
Fig. 12: Remove the stopper after installing the tensioner on the engine
Make sure all timing marks are positioned correctly (as described earlier).
Align the rear timing balancer pulley (to the right of the crank pulley) using a 6x100mm bolt or rod. Mark the bolt or rod at a point 2.913 in. (74mm) from the end. Remove the bolt from the maintenance hole on the side of the block; insert the rod into the hole. Align the 74mm mark with the face of the hole. This pin will hold the shaft in place during installation.
Loosen the tensioner adjusting nut and verify that the timing balancer belt adjuster moves freely.
Fig. 13: The balancer shaft must be held in position during timing belt installation
Fit the balancer belt over the pulleys. Remove the bolt or rod from the maintenance hole.
Temporarily install the crank pulley. Rotate the engine one turn counterclockwise, then tighten the tensioner adjusting nut to 33 ft. lbs. (45 Nm). Double check the positions of the timing marks and make sure they still line up. If not remove the belts and repeat the procedures.
NOTE: Both belt adjusters are spring-loaded to properly tension the belts. Do not apply any additional pressure to the pulleys or tensioners while performing the adjustment.
Remove the crank pulley. Remove the lockbolt installed earlier on the timing belt adjuster arm. Install the maintenance bolt with a new washer. Tighten it to 22 ft. lbs. (30 Nm).
Install the lower cover, making certain the rubber seals are in place and correctly located. Tighten the retaining bolts to 9 ft. lbs. (12 Nm).
If applicable, raise the lower beam and engine into place. Install the rear bolts for the lower beam. Tighten them to 28 ft. lbs. (39 Nm) on 1990–91 Accords, 37 ft. lbs. (50 Nm) on 1992–95 Accords and 43 ft. lbs. (60 Nm) on 1992–95 Preludes.
Install the key on the crankshaft and install the crankshaft pulley. Apply oil to the bolt threads and tighten it to the following:
1990 Accord: 166 ft. lbs. (230 Nm)
1991–93 Accord: 159 ft. lbs. (220 Nm)
1992–93 Prelude: 159 ft. lbs. (220 Nm)
1994–95 Accord and Prelude: 181 ft. lbs. (245 Nm)
Install the dipstick tube and dipstick.
Install the side engine mount (refer to engine removal and installation for procedures). Remove the jack from under the engine.
Install the upper belt cover.
Install the side engine mount support bracket if it was removed.
Install the valve cover.
Install the compressor and/or alternator drive belt; adjust the tension.
Route the wiring harness over the valve cover and connect the wiring to the alternator.
Install the power steering pump and install the belt.
Reinstall the cruise control actuator. Connect the vacuum hose and the electrical connector.
Double check all installation items, paying particular attention to loose hoses or hanging wires, untightened nuts, poor routing of hoses and wires (too tight or rubbing) and tools left in the engine area.
Refill the engine coolant.
Install the splash shield under the engine.
Connect the negative battery cable.
Start the engine, allowing it to idle. Check for any signs of leakage or any sound of the belts rubbing or binding.
If your having issues removing the crank pulley bolt you can get a special tool from snap on tools.It slides inside the pulley and holds it in place so you can break the bolt loose.Once the bolt is removed the pulley will slide off.
No it's right thearded, comes off counterclock, what you need is a Counter holder, this is a tool that looks like a big socket with a big hole in the center, fits over the outer hole (hex) where the crank bolt sits,it holds the harmonic pulley from turning while removing crank shaft bolt.Autozone rent this tool.
THe Harmonic balanced bolt is loosened by turning it counter clockwise. It is recommended that you get the special tool to hold the harmonic pulley stationary while the bolt is loosened or tightened. However the bolt can be loosened if you use an impact socket and a very strong breaker bar and place it against a strong part of the frame and just bump the engine over very carefully with the high voltage coil wire disconnected so that the engine won't start when you bump it over with the starter and make sure the socket and the breaker bar are very secure when doing this. I recently bought the special Honda wrench from Snap-On tools and it works great for this, but it's very expensive but it's the only way to hold the Harmonic Pulley sufficiently in order to tighten it back to the recommended torque. Which can be several hundred ft pounds, see the service manual for the exact torque.
first of all you are probably going to need a torque wrench for the crank shaft pulley bolt it has 225lbs.of torque or more.I just did one on my 1991 honda accord dx .you have to take off a/c belt ,alternator etc. on the crank pulley.(I took it to a shop and they heated the 3/4 in. bolt and used torque wrench. I broke a half inch breaker bar trying to get it offf) next use puller to take off crankshaft pulley.support motor and remove motor mount bracket. take off upper and lower timing belt covers.take off timing belt and other belt using the tensioners.take off and replace water pump CHECK ALL TIMING MARKS with #1 piston@TDC. There are about 6.