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testing for a hpo leak
I was talking to a local diesel mechanic and he told me how he checks for a hpo leak (the injector o-rings). He told me to take the oil line off one head and plug it. he said a powerstroke will run on 4cyl. if it wont stay running you have a hpo leak on the unplugged side. Does this sound like bs or has anyone else heard of it.
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