Repair 7

How to Install a Timing Chain Check Timing Marks on a Toyota 1986 Truck Engine

The 1986 Toyota Pickup belongs to the fourth generation of this series which was in production from 1983 to 1988. The most common engine for this vehicle is a four-cylinder 2.4-liter engine. The 1986 Toyota pickup uses a timing chain to drive the camshaft with the crankshaft. The timing chain may require replacement, although it can last for the lifetime of the vehicle. The most critical aspect of the timing chain replacement is keeping the timing marks aligned during the procedure.

Instructions

1

Disconnect the alternator and oil pan with a socket wrench. Remove the cooling fan with the water pump still attached. Disconnect the securing bolt for the crankshaft pulley and pull the crankshaft pulley from the crankshaft with a suitable gear puller.

2

Detach the water bypass hose to access the timing chain cover. Disconnect the adjusting bar for the cooling fan belt with a socket wrench. Remove the water outlet pipe for the heater.

3

Remove the mounting bolts for the timing chain cover with a socket wrench, and detach the cover. Separate the timing chain from the crankshaft damper. Remove the timing chain and camshaft sprocket from the camshaft. Remove the crankshaft sprocket and oil pump drive from the crankshaft with a suitable gear puller.

4

Turn the crankshaft clockwise with a wrench until the crankshaft key aligns with the timing mark on the crankcase. Align the key way on the crankshaft sprocket with the key on the crankshaft and mount the sprocket to the crankshaft.

5

Mount the new timing chain to the crankshaft sprocket so that the single bright link on the chain aligns with the timing mark on the crankshaft sprocket. Mount the timing chain to the camshaft sprocket so that the timing mark on the sprocket is between the pair of bright links on the timing chain.

6

Place the drive spline for the oil pump over the key on the crankshaft and mount the gasket for the timing chain cover to the front of the engine block. Turn the camshaft sprocket counterclockwise with a wrench to take up the slack on the timing chain.

7

Replace the cover for the timing chain. Tighten the 8-mm mounting bolts to 9 foot-pounds with a torque wrench and tighten the 10-mm bolts to 29 foot-pounds. Apply a thin layer of gasket sealer to the gaskets for the oil pan and timing chain cover.

8

Connect the adjusting bar for the cooling fan belt, and tighten its mounting bolts to 9 foot-pounds with a torque wrench. Attach the water outlet pipe for the heater and the water bypass pipe.

9

Mount the crankshaft pulley to the crankshaft and tighten its mounting bolt with a socket wrench. Attach the water pump and air conditioning compressor. Connect the oil pan and alternator.