The block code is STAMPED on the flat machined front face of the block.
Location is upper passenger side - where head bolts to block.
A 7 or 8 digit sequence number stamping , then a 2 digit application code.
The 2 digit code is the main ingredient.
For example will look something like this :
07798562
___ YN ___
The block casting date is located near the distributor hole.
It is CAST on the block in raised digits.
It will be 4 digits - with a fake looking screw head on each end.
Will look something like this :
@ B172 @
The head application code is CAST onto the head in bigger raised digits.
Located on top of the two center exhaust outlet ports.
For example :
11 .... or 33 ... or 4X
The head date code is CAST onto the head - on the outside - an inch or so below the valve cover.
It will look exactly like the Block Date Code described above.
You can check these on both your engines.
|