after 190,000 mile my 22RE blew its headgasket.
after removing the exhasut manifold, i saw it was wet in the #1 hole and #2 hole.
after removing the head and inspecting the head gasket i saw that the metal has delaminated around the round part near the combustion chamber of the #1 hole.
well why did #2 blow out coolant too?
because the green coolant that was in there ate away the metal.
i had changed out the coolant less than 10 months ago. but i did use green. shame on me. I have owned it for about 15 months. and based on the amount of stock parts on this truck and the overall lack of care this truck had before i owned it, I guess the coolant hadnt been changed if ever in the last 8 years.
please use the right coolant, OEM red Toyota coolant.
#1 hole. not horrible wear, but still bad.
#2 hole. very bad corroison on the exhaust side
a close up of the cavity
