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Here i went to remove a star shaped bolt with E14 torx socket and it was too small. Tried the 16 and it’s too big. Set doesn’t have a 15. Can’t seem to find an E15. Been reading might be no such thing but to try a 10mm in 12 point. Anyone run into this before? The bolts not with me now so I can’t try it. Thanks.
2013 ZX6R-636
Possibly a Torx Plus fastener?
I feel like for internal heads Torx will fit Torx Plus, but not external, but I could be completely wrong.
Going to try the 12 point metric and then replace with something more common.
2013 ZX6R-636
I recently discovered the external Torx fasteners on the Sprinter. Now have wrenches for them - which were not easy to find!
It’s a 350 mercruiser. Thermostat housing bolt. Some have these fasteners but some don’t. Only have a lousy pic.
What's the difference between a bolt and a screw?
First you screw, then you bolt.
Try going on mercuriser or Boat forum's ?
Yeah. Some mentioned this including my brands forum. Some used small vise grips to loosen then replaced with hex or torx T bolts. Found more info from a general google search which took me to a Harley forum apparently due to such a size being on a caliper and some German car forums. Now I’ve got to wait for rain to come and go and try metric 6 points , 12 points, open end wrench etc. no general consensus.
2013 ZX6R-636
Are you sure it's six-pointed and not double or triple square?
What's the difference between a bolt and a screw?
First you screw, then you bolt.
Dad's Dream: Earn enough money to live the life that his wife and kids do.
12 point 3/8 did the trick on and off. Of course once off I learned I the thermostat actually sat in the side of the housing and not in the manifold under the housing. One hose clamp and a pair of 9/16 hex bolt would have been a 10 minute job.
Last edited by backinthesaddle; 12-01-20 at 07:42 PM.
2013 ZX6R-636
That's not E-torx.
Glad you got it sorted.
What's the difference between a bolt and a screw?
First you screw, then you bolt.
You've probably already figured this out, but that looks like a standard 12-point. Maybe I'm missing some visual context, but seems like they'd still be easier than 9/16 bolts + hose + clamp.
The first time I saw a 12 point, it was when I separated a transaxle from the block and saw a circle of them holding the flywheel on. My initial reaction was "great, they used some specialty fastener for a critical part and now I gotta chase down some obscure tool..." Many years later and I haven't come across many 12-points. So I guess it technically was a bit of a specialty. Simple tooling though.
nedirtriders.com
Had never come across a 12 point before. Removing the two 12 points resulted in removing two sensors, two hoses, a bracket and the housing, with gasket on either side of the bracket. Once that all came off I was like oh man the t stat is just under that side cover. Lesson learned and won’t forget how easy these t stats are to remove.
2013 ZX6R-636