Originally Posted by
alex16
Actually head gaskets on many engines have gotten the repretation to blow head gaskets. Toyota 7mge, 3.0 v6, 3.4 v6.
It's ironic you mentioned the ford 4.0 as it had numerous head gasket issues. North Star Cadillac / Oldsmobile had numerous head gasket failures , also modular 97-03 ford 4.6 v8s have frequent head gasket issues. One of the most highly praised engine Toyota 22r has a very weak head gasket. Where as some vehicles such as my 1991 Cherokee I drove with no temperature gauge (idiot light didn't work either it turns out) and I didn't realize it was overheating until it stopped running. I let it cool and over heated it a few more times, off roaded it often (high rpm and oil starvation often) and never had any issues with a head gasket. Yet if you look at a 00-01 xj 4.0 they are notorious for heads cracking.
So yes in some vehicles head gaskets do just blow, from poor design, improper torquing, head bolts stretching, gasket flaw. ive read manufacturer tsb service bullitens that stated head gasket failure is common.