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View Full Version : Cylinder Block Coolant Drain Plug - Thread Type?


Woznaldo
17-09-2017, 11:39
I've misplaced my drain plug and can't remember the thread type. I think it's 1/8" NPT?
Matt Cole
17-09-2017, 11:57
Ooo. Good question. I will check my spare in garage......
Matt Cole
17-09-2017, 12:35
3161631617

It appears to be some crazy metric thread. M10x0.9mm
Woznaldo
19-09-2017, 09:43
3161631617

It appears to be some crazy metric thread. M10x0.9mm

That is weird! Is it tapered?

Thanks for the reply?
Woznaldo
19-09-2017, 09:52
Found this. Didn't even know it was a thing? Metric tapered thread:
Matt Cole
19-09-2017, 19:53
It doesn't appear to be tapered.
Woznaldo
20-09-2017, 12:51
It doesn't appear to be tapered.

I would have thought it would need to be tapered as the plug doesn't have a shoulder to torque against?
michael tierney
20-09-2017, 20:32
1/8 bsp
Woznaldo
25-09-2017, 14:13
1/8 bsp

Thanks Michael. Very much appreciated.