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[Jukeboxnut]

I have finally decided to replace the H.P. aircon valve on my car but I cannot find a spanner to fit the thing.  A 17mm spanner fits the hex fitting underneath it but nothing fits the valve itself either mm or AF.  All my spanners and sockets are too small or too large so before I resort to mole grips and brute force does anyone here know what to use?  Any advice would be most welcome.

[TheBoy]

I thought the flats on the valve were 15, purely from memory?

[05omegav6]

An adjustable spanner fitted vertically

[biggriffin]

I thought the flats on the valve were 15, purely from memory?

think 5/8 old money size.

[Andy B]

I agree with The Boy ..... 15mm socket 

[Andy B]

I thought the flats on the valve were 15, purely from memory?

think 5/8 old money size.

5/8" & 16mm are all but the same thing ...... which is a milli too big 

[joshwyatt]

Having replaced 2 recently, it's effectively a 14.5. Clearly no such size exists. Using a 15 at a slight angle worked well for me.

[Jukeboxnut]

Thanks for the advice, I has a quick try earlier this evening but it seems stuck fast so I gave it a quick squirt of rust buster and will try again tomorrow.

[TheBoy]

Remember the 17mm bit doesn't turn, and is just there to allow you to stop the whole thing rotating and splitting the pipe.

[jb]

mole grips always work for me..............

[Andy B]

Thanks for the advice, I has a quick try earlier this evening but it seems stuck fast so I gave it a quick squirt of rust buster and will try again tomorrow.

both bits are ally 

[Andy B]

mole grips always work for me..............

heathen ........... 

[Andy B]

Remember the 17mm bit doesn't turn, and is just there to allow you to stop the whole thing rotating and splitting the pipe.

 .......... apparently 

[Jukeboxnut]

Rust buster is an American product, a sort of superfine lubricant which penetrates and frees off just about anything so hopefully even ally, should find out later.

[biggriffin]

mole grips always work for me..............

heathen ........... 

proper tool.. Along with a hammer that's a full tool box