ok i think ill get one from my cnc machine tool shop. they have many high quality reamers for good prices.

can someone tell me what size reamer is used to do this??


and yes if anyone has an extra they would be will to part with i will pay shipping. thanks

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Don't waste your time going to a CNC machine shop. They will not have what you need. Buy the proper tool of make one. Picture a glow plug with the hot section replaced by a 7 mm drill bit. That's how I made mine, with a burned out glow plug and a 7 mm drill bit.

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

I am NOT talking about a machine shop....

I am talking about a shop that sells tools to machine shops.

This is where one obtains the highest quality reaming tools and that is where I'm gonna get my reamer from and make the tools

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The thread size of the Glow Plugs for my 1984 300D are M12-1.25.

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84 300D, 82 Volvo 244Gl Diesel