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How to dismantling and change timing belt for CB7 engine: 1. remove elektrik power (+) from accumulator 2. put suport on below engine 3. remove the bolt and left engine mounting 4. remove upper engine cover 5. open side engine cover (timing cover from black plastic) 6. please remember top marking on the crankshaft 7. make to slack tensioner wheel, and remove the belt.
note : there are two timing belt on cb7 engine, smaller and bigger
Locate the service check connector and, if applicable, remove the cap. On 1988-91 Preludes, the cap is yellow and the connector is located next to the vacuum control box in the engine compartment. On 1992-95 Preludes, the service connector is located under the middle of the dash. On 1990-93 Accords, the connector is blue and is located behind the right front kick panel, under the dashboard. On 1994-95 Accords, the service connector is located behind the glove box. Use a jumper wire to connect the two terminals of the service connector.
Following the manufacturers instructions, connect a timing light to the engine. The positive and negative leads connect to their corresponding battery terminals and the spark plug lead to No. 1 spark plug wire.
Make sure that all wires are clear of the cooling fan and hot exhaust manifolds.
Set the parking brake and block the front wheels. Start the engine. Check that the idle speed is set to specifications.
Point the timing light at the timing marks. On all models except 1994-95 Accords, the marks are on the flywheel. On the 1994-95 Accords, the timing marks are on the crankshaft pulley. When the engine is idling, the red mark must align with the pointer. Some timing marks are indicated by 3 lines; the center one must be aligned with the pointer.
If necessary to adjust the timing, loosen the distributor hold-down bolt(s) and/or nut and slowly rotate the distributor in the required direction while observing the timing marks.
To complete the adjustment operation, tighten the hold-down bolt, taking care not to disturb the adjustment.
Switch the engine OFF . Reinstall the rubber plug in the timing window and remove the timing light. Remove the jumper wire.
Fig. Fig. 4: Service connector on 1988-91 Preludes
Fig. Fig. 5: Service connector on 1992-95 Preludes
The timing marks for that car is located between the engine and transmission. There is a rubber plug(appx.2" long) on the front of the tranny bell housing, directly below the distributor, that allows access to see the timing marks with a timing light..
Check the position of the timing marks. The timing pointer mustbe perfectly aligned with the TDC (white mark) on the flywheel orflex-plate; the camshaft pulley must be aligned so that the word UP isat the top of the pulley and the marks on the edge of the pulley arealigned with the surfaces of the head. Additionally, the face of thefront timing balancer pulley has a mark which must be aligned with thenotch on the oil pump body. This pulley is the one to the left crankwhen viewed from the pulley end.
The balance shafts have marks on their sprockets that line up with indents on the block. For the one with the pin, just use a drill bit shaft that seems to fit the best and look for the marks. You only have two choices as you turn the balance shaft and expose the alignment hole. One of those spots will have fairly obvious marks that line up at the sprocket. The other one has a mark toward the front of the block. I'll see if I can dig up a photo and post it. The other tricky part is tensioning the belts, it's done in two steps while half the tensioner is clamped in place by a spare timing cover bolt. If you need help with this, let me know. Please, please don't forget to remove the alignment pin or the bolt you used to clamp the tensioner!