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just one, bottom row second in from rear on left side, did the pressure test - ran it at 18lbs took 20 min to squeeze one drop out, watched it come out right under the head bolt. going to pull the bolt and permatex it tomorrow and re test




Do you have studs or bolts holding on your exhaust manifold/header ?

I find it hard to believe 18psi pushing water out from under the head of a fastener that is torqued to what 75ft/lb ... steel against steel ?