engine id

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seniorbear69

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rayleigh essex uk
First Name
steve
Truck Year
1984
Truck Model
c20
Engine Size
350
HI i have a 1984 c20 350 th400 combo .the engine is not in a happy state .so today i removed the engine ive been around chevrolet engines for a while now but i do not recognise any of the id markings on the engine .the front pad in front of the pasenger side head reads KO402T4U under this is c91178349 can sum one help to de code this so far ive come up with nothing .
 
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seniorbear69

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Engine Size
350
HI again on the rear drivers side it says gm 3970010 on pasenger side just behind distributor says 350 ?
 
AKguy

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Truck Year
1981
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K30 Crew Cab Silverado
Engine Size
460
Any of the numbers match the VIN?
 
AKguy

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That block casting was used a boat load of engines. I have one sitting on the stand that was a 350 crate replacement in a 1979 K30. It has 4-bolt mains. Yours may or may not, think you have to peek.
 
Bextreme04

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Engine Size
350-4bbl
seniorbear69 said:
HI i have a 1984 c20 350 th400 combo .the engine is not in a happy state .so today i removed the engine ive been around chevrolet engines for a while now but i do not recognise any of the id markings on the engine .the front pad in front of the pasenger side head reads KO402T4U under this is c91178349 can sum one help to de code this so far ive come up with nothing .
Click to expand...


The first number tells you original build info. K0402 means it was assembled in Ontario, Canada on April 2nd. T4U is the suffix code for that specific engine application... I can't find a listing for it in the standard suffix code list, maybe because it was originally an export model? The closest I can find is T5A, which is listed as a 1984 350, 155hp, 4bbl, truck application.

The second number is likely a partial VIN. It will look different from the normal one since it is foreign production. You can find more info on stamping codes in the Lime Book: http://www.camaros.org/pdf/LimeBook.pdf
 
DanMcG

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1978 1985
Truck Model
k10 k10
Engine Size
400 350
Are you sure it T4U? I don't come up with anything either. Maybe you could share a pic of the numbers?
 
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