Toyota Celica/Supra 1971-1985 Repair Guide

Heat Insulator



See Figure 1

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Fig. Fig. 1: Engines in the 20R and 22R families are equipped with heat insulators

The or heat insulator is the covering over the exhaust manifold and is secured by three or four bolts. Remove the O 2 sensor electrical connection if equipped. Unfasten the bolts securing the insulator to the manifold. Remove any gasket material and check the insulator for leaks, cracks or corrosion. Install a new gasket to the manifold, then attach the insulator. Tighten the mounting bolts to 14 ft. lbs. (19 Nm).