This post recaps my blown motor and motor "refresh" and swap.
April 2016 I blew my motor (with 105,000) while doing some datalogging, I recently removed the boost limit in 2nd gear and my goal was to practice my driving skills and modulate the throttle and 23psi in 2nd gear. At the top of second it felt and sounded like 3-4 sledgehammers in unicen hit the underside of my engine, the car immediately shut off and going about 40mph I grabbed the wheel and applied brakes. The rear wheels were going through an oil slick being laid my the engine and my wagon was sliding towards the curb, the front wheels were turned to the left but I was understeering due to rear being broken loose. Eventually the oil subsided enough for the rear wheels to grip, slow down the wagon, and allow the front wheels to hook up .....just in time. I had red curb paint on my front wheel and bumper but the wagon received to major impact, the engine did however, lol.
It is hard to say with absolute certainty what happened as I wasn't logging when this happened but the carnage points to detonation on cylinder 3 which was likely due to my throttle body injection and the slight delay between DME shut-off and supplemental fuel system during a misfire.
aaaaand boom goes the dynamite...
Funny thing is this tow truck driver had picked me up before when I snapped an axle, he says: "what did you do this time?!"
Engine parts collected from the street
Engine tear down, draining, cleaning
Stay organized
#Wagon
Harbor Freight for days
Carnage
Oil pan was split in half!
This hole was a little scary as it was about 1"-1.5" from my high pressure fuel line.
Engine out
1 dog power
Oil pan removed
Cylinder 3 piston
Craigslist find: 35,000 miles N54 from a totaled 335is. I snagged it for $800, it was complete minus turbos but some of the other bolt-ons were damaged like the manifold, throttle body, valve cover; the oil pan and bump took the brunt of the damage during the car's accident. I rolled the dice knowing if the engine was scrap I could sell the good components and recover money.
I ended up selling the fuel system and some other engine components for $950 so free N54 for me.
Better look at the damaged replacement engine