CPS Leaking Oil - O-Ring and Cap Replacement

Enginebeginner✓ Community Verified

Problem

The Crank Position Sensor (CPS) on the 7MGTE is leaking oil externally from the O-ring seal and/or cracked cap cover.

Oil leaking from CPS areaCracked CPS cap around screw holesOil residue around CPS housing on cylinder head

Root Cause

The rubber O-ring that seals the CPS to the cylinder head becomes hardened and brittle over time, turning into hard plastic and losing its seal. The CPS cap cover can also crack around the screw holes, and the gasket under the cap degrades as well.

Confidence

Moderate confidence — Multiple community members agreed on this solution

View Original Thread →Posted March 2009 on SupraForums.com