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Ron (not verified)    May 28, 2021 - 12:48PM

In reply to by Peter Neilson

I went replaced the HG on my 2010 Prius. It wasn't that bad but I am an expert. I have done on GMC Acadia 3.6 Prius is nothing in comparison. The only confusion was following Alldata instructions on some parts specially on applying silicon on left side of HG before and after laying it down. I never liked the idea of using silicon on head gaskets as some techs do.I cleaned up the EGR passages but still getting the insufficient code. I don't want to replace it if it does NOT damage the new HG. Do you think if it does?

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