In-Cylinder vs Relative Compression Test - 2004 Toyota 4Runner

Scott Manager California Posted   Edited  
2004 Toyota 4Runner Limited 4.0L (1GR-FE) 4-spd (A340E) — JTEBU14R348014120

This is a vehicle that has a leaking head gasket that does NOT overheat. The symptom is that the coolant bottle will overflow and not pull coolant back in. A basic block check using chemical test was performed three times with positive results.

The following scope captures were taken during our investigation of the head gasket leak hoping that the scope would provide additional evidence.