radiator exploded

[Steve J.]

My 91 Caravan with the 3.3 broke the bottom radiator hose, so I replaced it and the radiator cap (which looked very old). I also replaced the radiator fan since it was bad. Everything seemed to be working good until -BAM- the radiator exploded while idleing. Sounded like a tire blow-out.
I'm replacing it and the radiator cap again.
My question- Is there anything else that could cause such extremely high coolant pressure, other than the rad cap? It was a 16# cap. The overflow hose was not kinked.

[MagicRat]

A blown head gasket combined with a bad rad cap would do it.

[RIP]

Rad cap doesn't even have to be bad. The head gasket can do it on its own. Good bet you have exhaust blowing into the coolant. You can buy a test kit to detect it.

[Steve J.]

Thanks guys.