The Honda D15B7 is a 1.5-liter, 1493-cubic centimeter, inline four-cylinder engine with a single overhead camshaft used on the Honda Civic from 1992 until 1995. The engine's timing is maintained by a timing belt that is connected to the crankshaft and camshaft pulleys, as well as the timing belt adjusting pulley. The Honda's timing-belt system is reliable, and timing should only be required when the timing belt is damaged. Although the timing belt can be adjusted, replacing it is a relatively easy process and eliminates future timing-belt worries.
Disconnect the negative battery cable with a wrench. Make sure it is not touching any metal when disconnected. After the battery is disconnected, remove the front timing-belt cover with a ratchet and the appropriate metric socket. The plastic timing chain cover is located at the front of the engine, and it covers the top timing belt/camshaft pulley.
Remove the No. 1 cylinder spark plug and wire. Using the ratchet and spark plug socket, remove the spark plug. The No. 1 spark plug is the forward-most spark plug, closest to the belt pulleys and the timing belt. Then attach a 50-millimeter socket to the breaker bar and place it on the center of the crankshaft pulley, located at the lower front of the engine.
Place a finger over the No. 1 spark plug opening and turn the breaker bar counterclockwise. As the engine turns, pressure builds in the No. 1 cylinder. Stop turning the breaker bar when the pressure is strong, remove your finger and look inside the hole for the top of the piston. Place a small stick into the hole to feel the top of the piston. The piston is at top dead center, or TDC.
Check the timing marks. With No. 1 cylinder at TDC, the crankshaft, or lower engine, pulley has a timing mark that should be lined up with the white timing mark located next to the pulley, on the engine block. The top timing belt pulley has two timing marks that should be even with the cylinder-head surface, at 9 o'clock and 3 o'clock. If all three are not close, the belt has jumped time and requires adjustment or replacement.
Remove the crankshaft speed fluctuation, or CKF sensor. Immediately to the right of the crankshaft pulley, unbolt the sensor using a ratchet and socket. Then pull the CKF sensor wire from its connection.
Loosen the timing-belt adjustment pulley bolt. Using a ratchet and socket, loosen the adjustment pulley bolt until it can be pushed away, which loosens the timing belt. The adjustment pulley is located halfway between the crankshaft and camshaft pulleys, and to the left of the water-pump pulley..
Remove the timing belt. Using the breaker bar and socket, turn the crankshaft counterclockwise until all three timing marks are aligned and the No. 1 cylinder is at TDC.
Replace the timing belt, making sure it goes under the crankshaft pulley, over the camshaft pulley, then over the water-pump pulley. After the water-pump pulley, loop the belt over the adjustment pulley. Tighten the adjustment pulley bolt until the timing belt is taught. Refasten the CKF sensor bolt and electrical connection.
Replace the top timing-belt cover, the spark plug and wire and negative battery cable. The Honda D15B7 is now properly timed.
