Yoyota Posted June 17, 2015 Share Posted June 17, 2015 Hey Guys, I have a question: Would there be OBC II codes for a blown head gasket? Thanks for your time Yoyo Link to comment Share on other sites More sharing options...
Fairtax4me Posted June 17, 2015 Share Posted June 17, 2015 There's no specific code that says "blown head gasket" because that's a mechanical issue that the computer can not monitor. There are codes that can be caused by the effects of a bad head gasket, such as misfire codes, P0420, cooling fan operation/temperature regulation codes, etc., depending on the failure mode of the gasket and what running conditions it is causing. What codes do you have, or what symptoms lead you to believe you have a bad head gasket? 1 Link to comment Share on other sites More sharing options...
Yoyota Posted June 18, 2015 Author Share Posted June 18, 2015 Hey! Thanks for your reply! The car is for sale at an upcoming auction. It says "Engine blown" in the report, but I can get it to turn over. Not start. If the engine was seized it would not turn over right? I checked the oil and it looked clear. So I am wondering if it could be something else. Like the starter not engaging. Any way, I thought I would see if it had any codes to help me Diagnose it. Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted June 18, 2015 Share Posted June 18, 2015 (edited) more details on car would help. just guessing, either slipped timing w/bent valves (likely- can you pull the covers to inspect?) (hold a slip of paper at the tailpipe while someone cranks the engine - if the paper tries to 'suck in' - you know an exhaust valve is open when it shouldn't be.) severe HG leak preventing starting? if you can get the codes, write them down to post them. But clear them, try to start the car, re-read the codes. can you spray some carb cleaner or ether start in the intake while trying to start it to see if it tries to fire? Edited June 18, 2015 by 1 Lucky Texan Link to comment Share on other sites More sharing options...
idosubaru Posted June 18, 2015 Share Posted June 18, 2015 there's no code for mechanical components. codes are only for electrical issues. sometimes a mechanical component might trigger the codes, but as a rule they do not. Link to comment Share on other sites More sharing options...
Suzam Posted June 18, 2015 Share Posted June 18, 2015 You should be able to tell if the starter is engaging. Plan on replacing the motor and bid accordingly, if it is repairable you're in luck. If not hopefully the winning auction price warrants being able to afford a replacement engine if necessary. You always roll the dice with an auction, in most cases you should plan for the worst. Link to comment Share on other sites More sharing options...
Fairtax4me Posted June 18, 2015 Share Posted June 18, 2015 "Blown engine" in this case probably means jumped timing belt. When it turns over does it sound smooth, maybe with an occasional chug? Or does it chug chug in consistent increments? Smooth fast crank means jumped timing, and depending on the year, bent valves. Link to comment Share on other sites More sharing options...
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