ECZ-6015B Block


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By Rudder2fly - 16 Years Ago
Is there any significance to the stamped number at the valley pan block surface to the front of the engine? #162YW. I have checked the main bearing bolt hole depth in the block and they check out at 1 inch. Is that factory standard? Thanks. G.S.
By Ted - 16 Years Ago
That looks to be a production code related to when the engine was originally assembled.  Some blocks will have them while a majority do not.  As per one of the early service bulletins, the decode goes like this: the first digit is the year, 2nd digit refers to the month, third digit will be a letter and refers to the day of the month, fourth number (1-2-3) refers to the shift that put the engine together, and a possible fifth figure is the inspectors stamp or code.  This is an early bulletin and the coding itself could have easily changed over the years and varied depending upon the assembly plant itself.
By marvh - 16 Years Ago
The main bolt holes in the later engines (built after 1959) like C2AE are deeper than the early engines such as the ECZ

The ECZ engine have about 0.6875 " (11/16) bolt contact in the block. The bolt holes in the ECZ blocks are usually 1.1875 deep so can be bottom tapped deeper.



When I rebuild the y-blocks I use ARP studs and turn them in finger tight after I have tapped deeper the thread in the block. This method still gives the stud thread near twice the thread contact the ECZ block previously had from the factory when using the factory bolts.



John Mummert recommends drilling and tapping the block even deeper until near in the oil gallery like the C2AE blocks are. I don't have an end milling machine to do that type of work to drill and tap deeper the block than was originally end milled. The local machine shops are to busy with the big bucks oil patch business to tinker with an engine also.





Its to cold here to go measure the C2AE block I have in the shed.

marv
By bird55 - 16 Years Ago
marvh, Your car pic knocked me out. Fantastic, I hadn't seen it before.
By marvh - 16 Years Ago
thanks.

That is the last one I built, did it in 2007

Here is a pic of the convertible I built in 2003 .