Serialnumber on motor makes no sense, please help!!!

jjbced01

Cadet
Joined
Sep 24, 2010
Messages
8
I spun a bearing on my motor, connecting rod is toast, crankshaft may be saveable, but I need parts. The serial number appears to be T0303TRL but I can not find anything out about that serial number. I am 3rd or 4th owner, the motor has been bored out .030 and rebuilt so its possible the block isnt even a mercruiser. Can someone please help me find out if this is a legitimate serial number? The block number is 10105867.

Also does anyone have a good cheap place they would reccomend for the rebuild kit and possibly crank?
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
Re: Serialnumber on motor makes no sense, please help!!!

... Also does anyone have a good cheap place they would reccomend for the rebuild kit and possibly crank?

Do you want good, or do you want cheap? They are usually mutually exclusive....

As for the engine number can you give us some idea of the make, model, year we are dealing with? Usually the serial numbers are the number '0' followed by a letter, followed by 6 more numbers (see the numbers in my signature picture). Does the engine have the original valve covers? Sometimes the serial number is on that, or a small aluminium tag on the flywheel housing near the starter motor...
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,463
Re: Serialnumber on motor makes no sense, please help!!!

I spun a bearing on my motor,

Ayuh,... What motor,..?? I4,..?? V6,..?? V8,..??
 

EMC 1810SS

Petty Officer 2nd Class
Joined
Aug 20, 2010
Messages
176
Re: Serialnumber on motor makes no sense, please help!!!

"Engine Code Stamping Numbers
All engines are stamped with an engine ID code, consisting of assembly plant code, production date and suffix code. The location of this code depends on the type of engine, typically as follows:
Small Block Chevy: Machined pad in front of the passenger side cylinder head. Often hidden by the alterator.
Big Block Chevy: Machined pad in front of the passenger side cylinder head or above timing chain cover.
Six Cylinder: Passenger side of the block behind the distributor.

The prefix portion of the ID code tells you the engine assembly plant code, and the engine's assembly date (for example, 0701 = July 1st....no year is indicated). The suffix portion tells you the original application, vehicle model, engine RPO/ transmission / horsepower, etc... (for example, CTY = 1970 396 Camaro, 375 hp, 11.0:1, TH400).


The engine assembly date must precede the car build date (often by a few days), otherwise something is amiss. Some engine machining operations (decking) will obliterate the engine ID.

Engine ID Code Example: V0101CLJ - (V = Plant, 01 = Month, 01 = Day, CLJ = Engine Suffix Code)
Another example: T0830CTY - (T = Tonawanda, 08 = August, 30 = 30th day, CTY = 1970 396 Camaro, 375 hp, 11.0:1, TH400)

Code Engine Plant Code Engine Plant
F Flint (Motor) S Saginaw Service
H Hydramatic T Tonawanda
K St. Catherines, Ontario V Flint (Engine)
(McKinnon Industries Canada)
M GM of Mexico "

So your block was built at the Tonowanda Plant, on March 3rd of some year and most likely a 350 out of a 1972 K20 pickup truck with an automatic transmission.

Engine Stamping Codes

Suffix codes
 
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