Why does this feel familiar? Luckily I won´t have to mill the diffusor from solid this time like I did with the last engine.
The diffuser was warped a bit but it straightened out after I cut the support wedges that must have bent the plate during casting somehow.
Drilling the centrum hole and the bolt circle, a digital readout for the mill is a very useful tool for things like this.
I´ll use four M10 insex 12.9 bolts to hold the engine core together.
Here I have just finished countersinking the holes for the insex bolt heads.
I had to make a jig to fit the diffuser plate to for the next job.
It was past midnight when I had finished the jig so I called it a night after realizing that my lathe was too small for this job.
Today I used some spare time at work to machine the compressor wheel recess, my job is as a mechanic at a local heating plant so I have a workshop set up there as well with a slightly larger lathe.
After some turning the recess was made with a bit of extra clearance for heat expansion and bearing play.
The compressor wheel looks like it was made for this.
I can´t exactly complain about the casting quality.
Cheers!
/Anders