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The R family of engines from Toyota, produced from 1981-85, were four-cylinder gasoline engines for front-wheel-drive vehicles. The 22R had a displacement of 2.4 liters and a single overhead camshaft. It used a timing chain, which had a lower risk of causing engine damage than a timing belt. The procedure for removing the timing chain from a 22R engine is generally the same for all vehicles.

Instructions

1

Disconnect the cable from the batterys negative terminal. This prevents the engine from starting during the timing chain removal. Remove the mounting bolts for the cylinder head with a socket wrench. Pry the cylinder head from the mounting dowels with pry bars in front and behind the valve rocker assembly. Lift the cylinder head off the mounting dowels.

2

Drain the radiator, and detach the hoses from the radiator. Disconnect the mounting bolts for the radiator, and remove the radiator from the vehicle with a socket wrench. Perform this step only if the radiator blocks your access to the timing chain.

3

Disconnect the oil pan with a socket wrench if it blocks your access to the timing chain.

4

Relieve the tension on the drive belts with the belt tensioner, and remove the drive belts from their pulleys. Attach a suitable puller to the crankshaft pulley, and remove the pulley from the crankshaft.

5

Remove the retaining bolts for the water bypass tube with a socket wrench, and detach the tube. Disconnect the heater tube. Remove the bolt for the alternator bracket, and push the bracket towards the alternator to access the timing chain cover.

6

Disconnect the mounting bolts on the timing chain cover with a socket wrench, and remove the cover from the engine. Lift the timing chain off the camshaft damper. Slide the timing chain and camshaft sprocket off the camshaft.

7

Pull the crankshaft sprocket from the crankshaft by hand. Lift the oil pump spline from the crankshaft, and pull it from the crankshaft by hand.

The original Toyota R engine debuted in 1958. Toyota manufactured the 22R engine from 1981 to 1995. The 22R engine appeared in Toyota pickups, Coronas, Hiluxes, Celicas and 4Runners.

Engine Specs 22R

The 22R Toyota engine is a 2.4 liter, in-line, four cylinder engine with a single overhead cam configuration. It had two outputs. The first version had 97 horsepower with 129 foot-pounds at 2,800 rpm. The second version had 108 horsepower with 138 foot-pounds of torque at 3,400 rpm. The 22R came in a carbureted version and a fuel-injected version.

Carbureted Version

The gas filter for the Toyota 22 R engine lies in the main fuel line and is separate from the fuel pump. For the carbureted engine, locate the plastic fuel filter on the right, rear frame rail, near the fuel tank.

Fuel-Injected Version

In fuel-injected 22R models, Toyota places the filter in different locations. Locate the metal fuel filter on the rear frame rail or in the engine compartment under the injection manifold.