Week 5 "The Detroit Series 60 assignment"

Over this last week me and my team have made some great progress on our assignment of taking this

 Detroit S60 engine disassembling it in order to remove the cylinder head, 1 piston, 1 liner, 1 cylinder of valves and injector. We were given a list or shall I say a partial list of some of the precision measurements we were to be taking during the inspection and re assembly of our engine. Along with this partial list, we were to follow the service manual and perform any other measurements required during inspection and re assembly.




Here are some pictures of the partial list and the recordings.

 One of the First sets of  measurements we checked was the bore in the liner and the thickness of the liner flange. After checking in several different spots vertically and radially which is what the manual was requiring us to do, we came up with the measurement of the bore to be 5.1194". According to the service manual with tolerance of the diameter of the bore being between 5.118" and 5.120" our liner was with in specification. We also checked the flange thickness on the liner. The service manual specifications were for the thickness to be between 0.3527" and 0.3543", what I ended up measuring was 0.3566" this was according to the service manual out of specification.

Some of the next sets of measurements I began to work on had to do with the camshaft, valves and rocker arm.

 

Above are some pictures of me measuring the diameter of a intake valve stem (0.3421") and intake valve head(1.7334"), along with checking the angle of the face of the valve (30.2 degrees). All of these measurements were within the service manual specifications.

Another set of measurements we were required to take were the heights of the camshaft lobes. Using a 2"-3" micrometer I measured the intake lobe height to be 2.75705", the injector lobe height to be 2.80825" and the exhaust lobe height to be 2.65150" These too were within specification.

Along with having to take many, many measurements this last week I was also forced to spend almost as much time reading the service manual and checking to make sure that I was measuring the right part in the right spot while staying within the required specifications. This was probably the most difficult task yet the one I learned the most from. It kind of comes back to the whole paying attention to detail thing.

For me it was the making sure that when we were checking the liner height protrusion, that we checked all other liner heights and there protrusion also. Then taking and matching the heights to make sure that they are all within specification to the block and to each other, both matter.


Using a Cylinder height or protrusion gauge I found the protrusion on this liner was 0.002". According to the specification with a minimum of 0.0005" and a maximum of 0.003" of protrusion, on this liner we were good.

I learned a lot this week, it seems most of it really had to do with taking the time and having the patience to do the research and make sure you are doing it correct. This probably has to do with the preciseness I have been working towards while doing all this measuring. 0.0005 of an inch is really hard to see or feel, but it can be done and I now have the knowledge, confidence and tools to do so. It was a Good week!


Week 5
Hours 23
Total Running Hours 124