TOPIC:

Found this head recently in my garage that came with the property. It's junk and I think automotive. Anybody know what it is... Pic of garage and head.

Looks loke a Honda CB of the 500/550/750 variety.


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Early Honda motorcycle heads don't have two spark plugs.  That head has water passages too.

How about more photos?

Looking around for twin plug 4 cylinder heads, it seems like it may be a Nissan Z or CA series engine head?  I couldn't find one that looked exactly the same, but these do show similar valve arrangement, combustion chamber design, and cooling passage arrangement....

en.m.wikipedia.org/wiki/Nissan_CA_engine

ebay.co.uk/itm/325669367492

www.athousakis.gr/en/kapaki/cylinder-hea...1e00-for-nissan.html
 

Thanks all, after being able to see the top side of the head it is definitely a Nissan head.   Also a pic of the back room of the garage where I found it. The P.O. had a old school hardware collection.

Those are some mean rodents that can eat a head casting 

Yes, the red squirrels around here have carbide teeth. Nothing is safe.

DOHC wrote:

Looking around for twin plug 4 cylinder heads, it seems like it may be a Nissan Z or CA series engine head?  I couldn't find one that looked exactly the same, but these do show similar valve arrangement, combustion chamber design, and cooling passage arrangement....

en.m.wikipedia.org/wiki/Nissan_CA_engine

ebay.co.uk/itm/325669367492

www.athousakis.gr/en/kapaki/cylinder-hea...1e00-for-nissan.html

 

Nailed it.  Outstanding sleuth work!  

Nessism wrote:

Nailed it.  Outstanding sleuth work!  

Thanks. Wikipedia and Google image search. I figured 2 valve, twin plug, 4 cylinder automotive heads were not very common, and the wiki page would mention the most common examples. I first looked at the Ford and it didn't have the alternating valve stagger. My second try was the Nissan, and that looked like a good match.

en.m.wikipedia.org/wiki/Dual_ignition