A Toyota Master Diagnostic Technician shares tips and tricks on how to check for a bad head gasket on Toyota and Lexus modern engines.
In this video we take a look at this almost 300k mile 2013 Sequoia which has a completely blown head gasket. We’ll start with a path of diagnosis that professional mechanics take to verify that we have a bad head gasket and how severe is it to be able to give the customer a full picture before digging in.
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I hope this video will especially help Prius DIY mechanics to distinguish between a cold start misfire caused by an EGR problem and one that’s caused by a Blown Head gasket on the 3rd generation Prius’s 2ZR-FXE.
This message is for all those who wrench on cars. Spend 90% of your effort on Diagnosis not on the repair. Majority of repairs are just a collection of nuts and bolts that go in a certain order. thorough diagnosis is what makes repairs successful, not the nuts and bolts part.
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0:00 Intro
1:53 Basic Diagnosis Method
6:06 Deeper investigation into head gasket clues
7:43 Simple way to SEE the head gasket leak (for Prius owners)
17:08 Important Machining information on Toyota engines
