craigmidlands said:

I have a 300tdi in bits that someone has filled with rad weld in the past.

View attachment 108653
My query is, the three triangular holes between 1-2 2-3 3-4 pistons. Where do they go in the head? should they be holes or blocked up as its just full of rad weld at present. Looked at loads of images but some have triangular holes in the head and some don't so i'm at a loss

Thanks in advance

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craigmidlands said:

I have a 300tdi in bits that someone has filled with rad weld in the past.

View attachment 108653
My query is, the three triangular holes between 1-2 2-3 3-4 pistons. Where do they go in the head? should they be holes or blocked up as its just full of rad weld at present. Looked at loads of images but some have triangular holes in the head and some don't so i'm at a loss

Thanks in advance

Click to expand...

dnorkett said:

They are not holes, it should be solid. Its where the aluminium has corroded away due to lack of the correct coolant/coolant mix.
If the holes are deep you should replace the head or get it repaired.

Click to expand...