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Author Topic: Why did Honda use dome headed nuts on cylinder heads?  (Read 2064 times)

Offline McCabe-Thiele (Ted)

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Why did Honda use dome headed nuts on cylinder heads?
« on: September 21, 2021, 07:21:32 PM »
Whilst cleaning up my cylinder head nuts I wondered why use dome headed nuts when you can't see them - why not just use a full nut?
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Offline Nurse Julie

  • 1977 CB550/4 Mongrel Brat. 1974 UK 500/4 K1. Honda CD250u.
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Re: Why did Honda use dome headed nuts on cylinder heads?
« Reply #1 on: September 21, 2021, 07:27:57 PM »
Quote from: Macabethiele (Ted) on September 21, 2021, 07:21:32 PM
Whilst cleaning up my cylinder head nuts I wondered why use dome headed nuts when you can't see them - why not just use a full nut?
They are fitted to stop the oil running back down the thread Ted.
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Offline McCabe-Thiele (Ted)

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Re: Why did Honda use dome headed nuts on cylinder heads?
« Reply #2 on: September 22, 2021, 09:23:16 AM »
Quote from: Nurse Julie on September 21, 2021, 07:27:57 PM
Quote from: Macabethiele (Ted) on September 21, 2021, 07:21:32 PM
Whilst cleaning up my cylinder head nuts I wondered why use dome headed nuts when you can't see them - why not just use a full nut?
They are fitted to stop the oil running back down the thread Ted.

Thanks Julie, I thought there was a reason but had no idea what -Honda ingenuity strikes again.
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Honda CB400NA Superdream (current money puddle)
Honda CB500 K1 (second money pit)
https://www.sohc.co.uk/index.php/topic,28541.0.html
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html
This is a neat 500 restoration in the USA.
http://forums.sohc4.net/index.php/topic,151576.msg1731556.html#msg1731556
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