UK-POLOS.NET - THE VW Polo Forum

OK heres the problem.

I want to install an oil pressure gauge and could only find a pressure switch (the bit that scews into the engine block) in a larger thread size. I have machined the new switch to the diameter of the one that is currently fitted an what I thought was an M10 thread. Looking at it though, my M10 die is coarse compared to the original switch which seems to have a finer thread.

My question is: what is the size and or type of thread used for this sodding pressure switch

If anyone knows please let me know as its driving me insane

yeah its M10 x 1.0mm thread, the same size as brake fittings

any ideas on the best place to buy a die from?????

well any good engineering stockist should be able to get one, but as its a special size it could easily be £30 to £50, but you could always screwcut the thread in a lathe or get one off ebay.

the other thing you can do is get a brake fitting and drill that out to say 8mm and turn the sender down to 8mm and the loctite the brake fitting in place with a retainer like loctite 601 or 638