I must admit, I'm a Rick loyalist, but I still approach this with an objective approach, and it doesn't matter who is involved. The OP didn't do his homework and sat on things far too long to expect resolution.
Tough nuggets. Grab your trophy for trying and exit stage left.
So you are saying, if you have a motor done by your machine shop. The motor sits for 4 months, then you get it running and it has issues. The machine shop is off the hook because it sat 4 mounts.