Something went wrong, ticking and smoke...
Thread Starter
Launching!
Joined: Dec 2007
Posts: 256
Likes: 0
From: Geelong, Australia
It has to be going down, its the only thing that would explain the smoke and crankcase pressure. I've started work on the stripdown, should have the head off tomorrow morning.
Thread Starter
Launching!
Joined: Dec 2007
Posts: 256
Likes: 0
From: Geelong, Australia
Pulled the head, can't see a problem.
Piston looks fine, gasket was sealed perfectly. No pitting, no marks, no scratches or cracks. Spark plug was also fine when I pulled it. Carbon matches all other pistons, cleaned off easily.
Haven't pulled the valves, but theres no marks on the head to indicate a problem. Will get the tools and pull them out tomorrow hopefully.
Piston looks fine, gasket was sealed perfectly. No pitting, no marks, no scratches or cracks. Spark plug was also fine when I pulled it. Carbon matches all other pistons, cleaned off easily.
Haven't pulled the valves, but theres no marks on the head to indicate a problem. Will get the tools and pull them out tomorrow hopefully.
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do you think it may have spiked at some point? wish aluminum was a little more forgiving. Looks like you will have to pull it and have another machined. It wont be that bad if you can assemble it yourself. I think a block can be had for 300-500 and an honest machine shop can clean her up and hone it for 1000-1300 ish usually.
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Is 30thou safe on an LS2 ?
I know my current block is only 0.005" and will be doing likewise with my next one.
I want the liners as thick as possible.
If all other parts are good, all you need is another block, so the financial cost shouldnt be too bad.
Although I'd seriously consider keeping any pistons/block as close to a factory bore size as possible to retain strength.
Although that's pretty **** damage...at least you found the problem.
Guys have done .030 over before, but it's probably pushing it with that kind of power. Most I've seen at that overebore were NA also. You could send it to ERL for a superdeck deal, but I'm sure shipping would kill you unless you just send the block.
Thread Starter
Launching!
Joined: Dec 2007
Posts: 256
Likes: 0
From: Geelong, Australia
do you think it may have spiked at some point? wish aluminum was a little more forgiving. Looks like you will have to pull it and have another machined. It wont be that bad if you can assemble it yourself. I think a block can be had for 300-500 and an honest machine shop can clean her up and hone it for 1000-1300 ish usually.
I wish it was that easy, stuff is alot more expensive in Australia. I've priced up an LY6 block at $1500 AUD (AUD and USD are pretty well 1:1 at the moment), + $800-$1000 in machine work + new bearings and gaskets. Won't be a cheap process and I really don't have that kind of cash at the moment.
Is 30thou safe on an LS2 ?
I know my current block is only 0.005" and will be doing likewise with my next one.
I want the liners as thick as possible.
If all other parts are good, all you need is another block, so the financial cost shouldnt be too bad.
Although I'd seriously consider keeping any pistons/block as close to a factory bore size as possible to retain strength.
Although that's pretty **** damage...at least you found the problem.
I know my current block is only 0.005" and will be doing likewise with my next one.
I want the liners as thick as possible.
If all other parts are good, all you need is another block, so the financial cost shouldnt be too bad.
Although I'd seriously consider keeping any pistons/block as close to a factory bore size as possible to retain strength.
Although that's pretty **** damage...at least you found the problem.
I knew it wasn't going to lasto forever, I always just wanted it to give me a sign before it detonated all over the road, so I could save the rotating assembly. Looks like I can salvage everything except the block, so thats pretty good I suppose.
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
It's not much fun in the UK either. Everything has to be sourced from the US and ends up costing a lot of money.
Still cheaper from the US than anywhere that has anything in the UK would sell for though. There is only a small selection of cars that use the LS platform here, and they are all Aus imports. At least you guys get plenty of LS based cars in Aus
Still cheaper from the US than anywhere that has anything in the UK would sell for though. There is only a small selection of cars that use the LS platform here, and they are all Aus imports. At least you guys get plenty of LS based cars in Aus
Thread Starter
Launching!
Joined: Dec 2007
Posts: 256
Likes: 0
From: Geelong, Australia
Yeah plenty of LS powered cars here, but 2:1 markup. Generally its significantly cheaper to buy from the US including postage than it is to buy locally. The sad part is, you also generally get a response faster from the US AND the product arrives faster than buying locally...
Well.. this was a complete flop.. not what i would of imagined.. i was thinking of blown rings. especially from cylinder #5 giving such low pressure. sorry to hear about this bud. wish you the best of luck and keep us posted!