Grounding strap location?

[CharlieS]

I'm no Toyota engineer, but I find it hard to imagine it is grounding the coolant pipe specifically. When new, that coolant pipe is coated in paint anyway, so it isn't going to be grounded - it would have had to be bare metal. The bolt that goes into the head is grounding the engine assembly.

 

[george_tlc]

It's just a convenient bolt to the body. Nothing more, nothing less

cheers,
george.