Have a Car Question? Ask a Mechanic Online.
Hi my name isXXXXX included the instructions with this post to help show you how to do this, the timing marks on the gears line up with different colored links on the chain. I hope this helps.
REMOVAL AND INSTALLATION
The correct installation and adjustment of the camshaft drive chain is mandatory if the engine is to run properly. The camshaft controls the opening of the engine valves through coordination of the movement of the crankshaft and camshaft. When any given piston is on the intake stroke the corresponding intake valve must open to admit air/fuel mixture into the cylinder. When the same piston is on the compression and power strokes, both valves in that cylinder must be closed. When the piston is on the exhaust stroke, the exhaust valve for that cylinder must be open. If the opening and closing of the valves is not coordinated with the movements of the pistons, the engine will run vey poorly, if at all.
REMOVAL AND INSTALLATION2.6L Engine (1987-88)
See Figures 1 and 2
The following procedures are the recommended removal and installion procedures for the timing chain. Some modifications to the procedures may be necessary due to added accessories, sheetmetal parts, or emission control units and connecting hoses.
The timing chain case is cast aluminum, so exercise caution when handling this part.
CAUTION When draining the coolant, keep in mind that cats and dogs are attracted by the ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.
It may be possible to replace the timing chain without removing the cylinder head, however removing the head will make the job easier.
CAUTION The EPA warns that prolonged contact with used engine oil may cause a number of skin disorders, including cancer! You should make every effort to minimize your exposure to used engine oil. Protective gloves should be worn when changing the oil. Wash your hands and any other exposed skin areas as soon as possible after exposure to used engine oil. Soap and water, or waterless hand cleaner should be used.
If the bolt locking the oil pump driven gear and the balance shaft is hard to loosen, remove the oil pump and the shaft as a unit.
If the tensioner rubber nose, or chain guide show wear, they should be replaced.
To install:Fig. 1: Timing chain and sprocket alignment Fig. 2: Balancer chain and and sprocket alignment
The counterbalance shaft and the oil pump can be installed as a unit, if necessary.
If the thrust plate is turned to align the bolts holes, the O-ring may be damaged.
The sprocket timing mark and the plated chain link should be at the 2-3 o'clock position when correctly installed. The chain must be aligned in the right and left chain guides with the tensioner pushing against the chain. The tension for the inner chain is predetermined by spring tension.
2.6L Engine (1989-93)
See Figures 3 through 7
Fig. 3: Exploded view of the balancer chain and timing chain assemblies
Fig. 4: Retaining the timing chain adjuster
Fig. 5: Timing chain and camshaft sprocket alignment Fig. 6: Timing chain and crankshaft sprocket alignment
Fig. 7: Balancer chain and shaft sprocket alignment
If, when applying the downward force on the chain guide, it bottoms against the adjusting bolt, you should replace the balancer chain.
See Figure 8
Review the complete service procedure before starting this repair. Refer to the necessary service procedures in this information.
Fig. 8: Timing chain and sprocket alignment
The shafts should be keyed in the gears and then the link in the chain times the balancer shaft.
If, when applying the downward force on the chain guide, it bottoms against the adjusting bolt, you should replace the balancer chain
I have not run into this before, I have read back through and did not see where the dots were noted.I am using alldata. Maybe this is something not released by mazda?I think we both have learned something from all this. I hope the rest works out.