Technical What’s this hole for

[JonPiz]

I’m trying to identify if this is just a bolt hole for the tin work or something else. It’s a larger thread than the other holes holding the tin work on.

 

[Bleeding Knuckles]

If you read the 'Haynes Manual - 126' Chapter 1 para 10 line 6 it shows the missing hollow bolt that vents any gasses in the event of the cylinder head gasket failing. The two hollow bolts (one each side) help locate the fan housing onto the engine too.
Ian.

 

[Toshi 975]

I’m trying to identify if this is just a bolt hole for the tin work or something else. It’s a larger thread than the other holes holding the tin work on.

Disappointed by the poor quality of the hollow bolts that are available I made some stainless steel allen head ones and had some spare if anybody needs a pair

 

[JonPiz]

Disappointed by the poor quality of the hollow bolts that are available I made some stainless steel allen head ones and had some spare if anybody needs a pair
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Well seeing as I don’t have these I would much appreciate them. Let me know how much I can send you for these