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Discussion in 'VT - VX Holden Commodore (1997 - 2002)' started by That Deaf Guy, Jan 27, 2020.
Any idea how the hell this happened?
Piston looks like it's lost part of the crown/top ring land. It got hot, rings butted up and grabbed the bore, piston got stuck and the rod paid the price.
Turbo, supercharger or nitrous?
Stock internals. 240000 Kay’s, has had a misfire, flat spot and backfiring for 6 months. Then the last few weeks after replacing nearly everything, one piston gave way while disconnecting injectors one by one
Really need to get a better look at that piston, but my bet is the piston got stuck in the bore and the rod let go.
Just to confirm, this is an LS1?
Yes it is VX SS
Maybe the big end bearing locked up or the roller bearing on the conrod is stuffed.
Roller bearing on the conrod?
Yeah my bad pin bush.. Sorry.
One of my rides has a roller big end and small end.
Please tell us more, what ride?
My guess if you say it's had a miss or backfire for 6 months it's either smashed up conrod bearing of problematic cylinder out of shape or sound was rod knock untill it finally let go.
Ls1 make all kinds of noise around 200k mark.
The cause of the problem is faulty fuel injector. Second motor has seized only by trying to start. It hardly fired up. When we unplug the fuel injectors, leaving them plugged into the fuel rail. Turn the ignition to on and one of the injectors squirt a never ending stream of fuel. Anyway, the engine hydralocked. Now round 3 with new injectors.
guess i was lucky i had injector problems with a camshaft so i had more fuel getting pushed out exhaust/intake then kept in cylinder, mine were 2000cc and then were jamming full open at cranking, i could then unplug injectors and start engine and it ran for 15 sec on the fuel dumped in...
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