I have a block that was cast in Mexico, the pipe thread tap above the oil filter is metric, I believe a M10 1.5, if M10 is close to 3/8". Anyway, I want to install a oil pressure transmitter in this hole. The transmitter is 1/8" npt male. But, the tapped hole is so close to the oil filter casting only a bushing adapter will fit, the hex part of a fitting will hit. So I need/want a M10 1.5 male to a 1/4" female npt. This way I can install a 2" long pipe to a tee. Problem is I can't find a M10 1.5 bushing adapter. Surly someone else has run into this? Thanks for any input.
Odd. Not saying this is not true but odd. I have had a few mexican blocks and they use NPT fittings for the oil pressure gauge. Maybe its because my blocks are older blocks. I have had good lock finding adapters at ACE hardware, a Westlake is the same company. Have you tried one of those places?
I have only looked online, what I find all have the wrench hex, which I suppose I could grind off to make it work. Only found 2 with the size I need and they are stainless. Will try ACE next time in town.
You could try a short ****** and then build from there too. it won't be as clean. I am sure you will work it out.
If you could make this yourself or a buddy could make what you want on a lathe and milling machine--- or go to a machine shop and tell them what you need --- this is if you can't find the fitting you need --- this is/ should be a simple fix --- hard is hard as you think it is ----been there !!!
I agree that it should be 1/4" NPT, not metric, and also that a plug is fine, oil pressure senders/lines normally connect to the 1/8" NPT hole next to the distributor, behind the intake manifold.
Thanks for all the replies. Came up with a fix. First off the hole is NOT 1/4" pipe, it's 3/8" pipe. Next, I couldn't use the 1/8" pipe hole next to the distributor because I already have something else in there. So originally there was a plug installed in a bushing which was then put in the 3/8" pipe hole. So two pieces in there, which I removed. I tried to install a br*** 3/8" to 1/4" bushing, it would not go in, hence the metric thinking. Which was wrong. If I tried a steel 3/8" pipe that has a very noticeable taper, goes right in! The short 3/8" br*** bushing has no such taper and would not start. The plug I removed is in fact just a little smaller than the br*** one, why? The fix? I ran a 3/8" pipe tap in the hole to make it large enough to get the br*** bushing installed. Seems that MAYBE, originally the pipe tap was not run in far enough? Would have been much easier to do when the block was on the stand, instead of in the car. So if you have one of these blocks, check this hole before installing it!
Sounds like the br*** piece you had was BSP. British straight pipe thread. Some as NPT but, no taper.
Beware of hardware store br***.It isnt all made from solid stock like Edelman. I picked up a piece for use on a brake master cylinder,and it leaked THROUGH the br***.Turned out it was a cindered br*** formed piece.
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