Question about 1998 GMC Jimmy
Two numbers on the block are W7S82 and W7S27AFJ. What is the year model of this 4.3 Vortec . I was told it was a 99 but some 99 parts don't fit
In one word NO! The number on the block mean very little as far as the year! But GM is one of the better when it comes to swapping parts! Never heard of this before! Sure like to know what parts are not fitting?? Frankster016
Posted on Oct 23, 2008
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Posted on Jan 02, 2017
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Search the block for the engine block casting number. The numbers are raised, not stamped into the block and consist of seven numeric digits. The digits can be located on either side of the block. The seven-digit number may be followed with a dash and further numbers. These are change codes and are not normally necessary to identify the engine.
Locate the casting date is located on the block. It is in standard date coding, 2.25.93, for example and may be located on either side of the block, but is commonly located on the driver's side of the block, above the freeze plugs. The example 2.25.93 decodes as February 25, 1993. The casting date may be near the casting clock, which designates the hour the block was cast. Magnum engines were manufactured from 1993 to 2002, so verifying the date code helps identify the engine.
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