312 Marine Engines-Any Useable Parts


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By Oldmics - 15 Years Ago
I have been offered a 312 marine engine.

What parts can I use for an engine that I will build to race?

I think they are reverse rotation so the cam stuff is not useable.

What about the heads?Do they have some wierd cooling  plumbing?Would the heads be useable?

I assume block and crank would be keepers?

Oldmics

By Hollow Head - 15 Years Ago
All exept intake, cam and exhaust manifolds is usable. Maybe even intakes with some efi stuff and pair of turbos Tongue.

http://www.tradingdock.org/1864

http://www.marineengine.com/boat-forum/forumdisplay.php?f=13

http://www.dragtimes.com/parts/FORD-Y-BLOCK-272-292-312-RAT-ROD-MARINE-INTERCEPTOR_380215441773.html

http://mycars.home.comcast.net/~mycars/JetBoat/Instruction-Manual.pdf

By Ted - 15 Years Ago

The reverse rotation was only available in dual engine setups and in those cases, only one engine was reverse rotation to counteract the torque of the other engine.  Most of the core parts for the marine engine such as the short block and cylinder heads are interchangable with the car stuff.  The oil pan, timing cover, crank pulley and some miscellaneous parts were marine specific but many of the other parts are usable otherwise.

By Oldmics - 15 Years Ago
So any chance for "posted heads"?

How long a period of time did they build the 312 marine engines?

Oldmics

By Ted - 15 Years Ago
Oldmics (4/26/2010)
So any chance for "posted heads"?

How long a period of time did they build the 312 marine engines?

Oldmics

I have sonic tested a C2AE 312 marine block that was cast in 1967 so they at least made 312 blocks up to that point.

Y engines starting with the ’58 models will have posted heads.  1957 was the last year for any non-posted heads being used for production purposes.  As far as exactly which heads are being used, the head casting numbers will need to be scrutinized as I've seen marine engines with a variety of different valve and combustion chamber sizes.