Freeze plug sizing for b2600i

ThatCracked2600i

Hey guys! I took my block heater out and unfortunately the threaded piece that holds it in broke so I’ve been looking to find a frost plug that fits the hole but I’m having a hard time knowing what size. Does anyone know the freeze plug size for the G6 engines?

MazdaMitch

I don't know the sizes. What I did was order a kit of them and took the old ones out and compared the size to a new one and used that.

I went with brass so I would never have to worry about rust.

Book says to skim coat the edge with grey RTV and hammer them in.

Axel-Breaker-Earl

Rockauto will list/have several different sizes for the G6 engine. I would imagine that the one you need is on the side of the engine block.......most of the freeze plugs on the side of the engine are all one size on the G6 engine.

Link to the B2600i freeze plugs (expansion plugs) on Rockauto.....

https://www.rockauto.com/en/catalog/mazda,1991,b2600,2.6l+l4,1190641,engine,expansion+plug,5332

Pics of the G6 engine block.....

On the brass freeze plugs, the most common size for the G6 is Dorman part number......565-093