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Has any1 seen this sort of damage before?? Piston damage, bent pushrods, melted intake manifold

Kraziiii

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20190728_230846_resize_87.jpg
20190728_230846_resize_87.jpg So I went against my own golden rule & I let 'a mate' who said they knew what they were doing, work on my pride & joy BIGGEST mistake I ever made as you can see...


Luckily I have a really good mate who actually is a good mate & is saving my butt right now. We've decided to go with a motor swap but Im still trying to get my head around how the hell this much damage happened so quickly & what exactly has happened besides the obvious valves smacking the **** out of the pistons we haven't gone any further than ripping the heads off so far but I know the damage can't have stopped here

Before anyone says 'never let a backyard mechanic play with your pride & joy' I stuck by that rule for the 5yrs I owned this car & learnt the hard way why I will never do it again. The lifesaver 'heaven sent' mechanic working on it now is fully qualified & knows his VE's.
As much as he hates fixing ammatteur 'know it all' stuff ups, he's still helping me out & going over her with a fine tooth comb to make sure everything is back up to scratch & that nothing like this ever happens again...

Any comments & insight will be greatly appreciated...
Thanks in advance
 

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_R_J_K_

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What did you have him do?

Looks like oil buildup on the intake, if the runners had melted I'd wager a lot of the other plastic that makes contact with the head around the ports would have too.

Looks like a ring land has broken off (or something was dropped in the cylinder) and smashed around inside the cylinder clogging up the valves and causing the pushrods to bend, doesn't look like the valves have made contact with the piston (no valve shaped indentations and no bent lips on the valves). Outside of awful tuning or dropping something down there, there's not a lot you could do to directly cause this.
 
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the_boozer

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What was your mate doing to the engine in the first place? Was the pot with the broken piston full of coolant and something had to give ? Pissed n broke
 

EYY

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Cammed it with stock pushrods (and possibly stock springs) and a **** tune?

Intake valves stuck open caused the intake damage I’d guess?

Tbh it’s going to be cheaper for you to find another good used engine. $3-4K would have you sorted. Still cheaper than spending money on that mess and you’ll save time too.
 

gtrboyy

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Might help if you actually tell us full story...

What work & mods did you get him to do?
Did it do that straight after he finished job?
Mileage & service history?
Cam/dod lifters shat itself?

Could easily say shoddy service history with engine having blowby issue or something hence oil crud filled manifold or dod lifter let go we don't know actual story/history...
 

pnlimo

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View attachment 206123 View attachment 206125 Yep. I've seen something similar a couple of years back. My L98 with 512,000 blew a piston and bent a con rod. Happened while starting. cranked a couple of times then, an almighty bang! Even with the high kms (car was serviced meticulously every 7,500 kms using fully synthetic oil and genuine GM filter) the engine was running perfectly before this happened. Fortunately, I sourced a low Km replacement motor which my mechanic fitted.
 

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immortality

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Fucked up cam timing causing things to hit and fire to go where it shouldn't = bent/broken and melted ****.
 

vywgn

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As above timing on the engine jumped around and caused the valves to touch
 

Smitty

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... seen worse
6800 WOT in third around the back of the Hayshed at PI



 

Dylan kingswood

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Valves haven’t touched that piston and valves are intact I’d say something foreign has gone through ? A ten mm but will do that sort of damage and that’s speaking from experience lol
 
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