Comments by "Mikko Rantalainen" (@MikkoRantalainen) on "What Actually Happens When You Overheat an Engine" video.

  1. Make sure to check the head for internal cracks. Older VAG TDI engines are well known for cracking the internals of the aluminium head when you overheat the engine even a little bit. The engine block is heavy duty cast iron and never breaks. Typically the coolant water starts to leak to intake or exhaust side of the valves.
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