Strange head gasket failure

Lipka101 · Dec 26, 2016

So I pulled the heads on a studded motor because it was pushing coolant and this is what I found. How did this happen? Gasket was leaking and cylinder pressure did this? Anybody ever seen anything like it.

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Lipka101 · Dec 26, 2016

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DEEZUZ · Dec 27, 2016

I find that about every 5 jobs or so. Pretty common. Those are the ones that usually lose heat at idle

jpow95 · Jan 24, 2017

CTC what do you mean loose heat at idle curiosity

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DEEZUZ · Jan 24, 2017

HG failures like that one, where the gasket itself is blown through are usually the ones that will cause you to lose heat at idle. Basically because its such a big blow out, it doesnt take heavy engine load to pressurize the cooling system. The compression fills the heater core when at idle, when coolant flow is minimal. When you get back going the waterpump then pushes the air out and then you have heat again since coolant has pushed the air out.