Project XXX AWD WHP Or Bust!

[blackawdtsi]

It's kinda hard to figure out what happened without actually seeing it.

From the pictures, it looks like a rod nut wasn't properly tightened. Which caused the nut to loosen then shear off the bolt and as the piston was pushed down, bent the rod and turned the piston. If the piston was suspended for 14 or so degrees at TDC just after the bolt sheared because of the play from having only one rod bolt, that would explain the bent valves.

singletracker, maybe you know something I don't. But wouldn't an overrun FPR just not be able to control FP and dump too little pressure and raise the fuel pressure at idle / low boost. How would it get into the oil?

[s1ngletracker]

Originally Posted by blackawdtsi

It's kinda hard to figure out what happened without actually seeing it.

From the pictures, it looks like a rod nut wasn't properly tightened. Which caused the nut to loosen then shear off the bolt and as the piston was pushed down, bent the rod and turned the piston. If the piston was suspended for 14 or so degrees at TDC just after the bolt sheared because of the play from having only one rod bolt, that would explain the bent valves.

singletracker, maybe you know something I don't. But wouldn't an overrun FPR just not be able to control FP and dump too little pressure and raise the fuel pressure at idle / low boost. How would it get into the oil?

Yeah, i didn't actually look that closely at his failed motor pictures - it does look like a stud failure or some such thing. I was reading earlier in the thread and was like WHOA! twin pumps... dont' see anything about upgraded fuel regulation.

So when you run too rich, you can actually run so rich that you have just a ton of unburned fuel that slips past your rings and drains down into your oil pan. I've unfortunately experienced such a thing, my oil level rose and it smelled like gas. Needless to say I did like 3 oil changes in quick succession to get that crap outta there.