A little but rear main is gone, still has oil pressure, blew out the dipstick and rear main so probably piston or ring
Going for 9s? In the zf?
- Thread starter zf>allison
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A little but rear main is gone, still has oil pressure, blew out the dipstick and rear main so probably piston or ring
Looks like definitely a whole piston and rings and oil squirter is all in the pan. Think it's gonna look the exact same as the lb7 I dropped a valve in. Coolant is gone, I'm figuring the wrist pin went through the cylinder wall into the cooling passage again. Oil was super over full even though it puked a ton all over the track and truck. Either it dropped a valve or leaned out and toasted the piston so bad it exploded or melted. I found piston and ring chunks in the adapter cover under where the starter goes through. Obviously got pushed through the inside out rear main seal lol. I'll try to get some pics up but service sucks. Plan is to drop in another stocker maybe with some valve springs.
Yeah she did great, I never thought I'd have hit a 10 on a stock engine with a zf6 especially. We have to get this thing back together and get back out there. Gotta get some solid springs in an engine so I can finally bend some damn rods.
Slight hone and another set of Lilly pistons should do it. It still ran with two missing pistons?
Well I meant one piston in each engine I've blown up.it ran fine doesn't really miss when it can't build compression. Drove it on the trailer just like when I dropped a valve. I ran an 11.3 throwing the belt losing the dual fueler and this happening with a crappy launch.this engine would need a few sleeves lol
Lol, my LLY puked all the oil out and shook horribly, my LMM just had a slight miss. That LLY has been a hell of a motor. Those were completely stock pistons weren’t they?
Damn, that sucks. Good luck getting it back together. Also, just an FYI for you. Since diesels don't run a throttle, they don't really have a problem running lean air/fuel ratios like a gas engine. If the belt getting thrown had anything to do with the failure, I would guess it was caused more by a drop in rail pressure causing a spike in pulse width than anything, but I think it is just as likely that the failure caused the belt to jump off. Regardless, it sucks to lose a motor, but at least it wasn't a built motor. Those are the ones that really hurt.
I've lost the belt both times I've run it powershifting since I rerouted it to clear a bolt head. I know without a throttle plate it would be hard to lean it out but I figured with enough spray anything is possible. I'll pull the heads and try to see for sure what was the cause to the chain reaction. Also I know it has to spike rail pressure going from a full load at around 60 psi and spray to just popping the clutch to do a gear change. The gear change a are usually very quick but I'm sure i still get some killer spikes. And yeah I don't think a built engine is in my future, at least on a stocker you know it's gonna fail eventually lol
id almost think you hurt valves with the way that thing had been holding up. may have floated a few on that cyl and bent them.
That's my bet too with stock springs and all the boost and rpm and spray. I know I floated mine with twins at 60psi and 4500rpms in my original stock motor. The broken converter took the bearings out before the bent rods could lol! Only motor that I have actually blown up(thrown parts out of it) was my original built motor after it's second crank replacement. Had a nozzle pop the nozzle tip, where the holes are, completely off and blew everything out the side of it. Granted I was doing 115mph at 120psi boost when it popped so it was one hell of a crankcase evacuation! There was not a single piece of the piston, wrist pin, or rod in the pan, not even any oil in the pan. Everything went out the side of the block. Cost me a cam, crank, 2 rods, a piston, block, oil pans and oil pickup tube. Popping a stock motor would have been a lot easier on the pocket for sure!
Yeah I've been known to spray the n20 on the limiter before I even dump it to launch, it really leaves hard that way which is nice. Valve problem is probably it
Haven't thought about much other than valve springs and uppipes. Havent blown a bellow but ive stretched a few. Don't wanna dump a ton in it when I can trap over 130 on stock stuff.