M096865

Good morning all.

Just bought my first vet.
2006 C6 with LS2 engine with only 37K for miles for 11k.
One problem, engine sucked in water.
Shop already took apart top end and changed valves and valve springs but still has lower end noise.
They think it may be one damaged cylinder.

Wanted to check with forum for any advice for investigating and also any good tech. manuals or sites for engine teardown.

Thanks in advance for all the feedback.

Cooter Tech

weathermaker

I had a boat with water ingestion. Spent too much money trying to fix it. Ended up with a long block replacement. The only repair I would consider.

M096865

Thanks guys and before I bought the car I figured worst case senario and even if I had to replace the engine it would be a out 7K or if I rebuild 4k.

so even at that I get a sweet vet with z51 and 3LT for less than 20k and have a 0 mile engine.

If I can fix it, then car costs me 13K.

Keep the threads coming.
THANKS
SCOTT

wstafford

It can be fixed. Most likely has a bent rod or two. Block shouldn't be hurt, if you're not in a big hurry to get it on the road, repair what you have and save 3,000. Does it have an aftermarket CAI on it? I have one for my wifes car but haven't put it on from fear of sucking up water and having the same thing happen. Probably not much of a chance for that, but that's my excuse. haha.
Good luck with your engine,
Stafford

M096865

Yes I believe the seller mentioned that it was a hurricane, if that sounds right.

Definitely looked much wider at the front then tje stock intake.

As you mentioned I'm hoping I can fix it over this winter and have it ready to roll in the spring after the CT roads clean up from the sand and salt.

Any suggestions on where to find tehnical/guides for engine disassembly and reassembly.

Thanks
Scott

rkj427

OEM Factory Service Manuals would be your best choice!

Look in the "For Sale" area here, or possibly on the big auction site.

Best to get the correct year for your car.

Landru

Aftermarket intakes were all the rage w/ C5/C6, many got them.
But once in a while a member would get caught in a deluge w/ ponding water.
Low intake vacuumed up water & engine was hydrolocked...trashed engine, IIRC.
In fact when C5 Z06 was the hottest thing around, first one I'd ever seen was parked in a bay at Chevy dealer in the small puissant town I lived.
Hydrolocked, due solely to AM intake & #1 reason I never installed one on any of my Corvettes.
Though there might have been improvement(s) making ingestion unlikely if not hard to do, I wouldn't know.

Crank & mains are undoubtedly toast first-off would be my guess.
Good thing an entire winter's available for this total rebuild.
I'd be tempted to do as thorough as possible estimate on required parts vs crate engine, before committing to old motor though. YMMV

Please do keep this post alive w/ updates, it'll make for a fine read.
Regardless which direction you go once running it'll be a sweet C6, for pennies on the dollar.
G/L

Chevyrelic

M096865

I wouldn't have touched it if it was a flood car.

No just sucked in enough water through the air intake from road ponding that it damaged the engine.

The rest of the car is mint.

My plan is to fully document my engine disassembly with photos both to remember what I did and to be a guide during reassembly.

Previous response about OEM manuals is a great idea. They must have a complete teardown and rebuild manual for LS2 engine.

Keep them coming.
Scott

Jstan2014

M096865

Found a great book from "motorbooks" that gives you the step by step instructions for disassembly and reassembly.

My buddy also has an old 350 he was going to chuck that I'm going to teardown first before even attempting my engine.

Nothing beats physically seeing parts versus looking at pictures.

The greatest part of the deal is I don't have to put it all back together.

Just so no one gets crazy ideas that I'm loosing my mind for tackling such a job, I do work on all my cars and I also have been a process engineer for 28 years disassembling and reassembling jet engine.

I look at it this way, I have nothing to loose trying to save the original engine. If after I get it torn down, it doesn't pay to fix it, then I buy a crate motor and put it in.

Planning to start by pulling plugs and borescoping each cylinder and pulling oil pan to check for any metal fines or small pieces. Hopefully that will give me a general feel of what I'm getting into.

Hopefully picking up the car this week with a trailer.
Scott

Dano523

Would pull the history of the car.

If just motor hydro locked from say a vararam intake system and the car drove through a deeper puddle to just hydro lock the motor, then should just be a motor problem.
Note, if the motor hydro locked with the OEM intake system on the car, it a flood damage car since the water go that high enough to start with.

If a flood damaged car that the water got high enough/long enough to flood the drive line, modules, inside of the car isntead, whole different story, and you will be chasing problem for the life of the car isntead.

Hence this is the reason that you pull the Car fax and GM service history reports on a vet before you buy it, since any sigh of flood damage, you run away from the car as fast as you can.

M096865

Dano
I don't disagree normally but as I said earlier in this thread, the car had a hurricane intake. Car was not a flood car which would of had a salvage title. Car was just uneconomical for insurance to repair. Payed out 21k to owner and then auctioned it off.

Dealer I bought it from already changed the valves and springs and balancer thinking that might fix it but it still had a lower end noise.

He just wanted to cut his losses rather then go deeper into the engine.

Again paid 11k so even if I need a new engine, I'm way ahead of the game.

By the way every interior electrical thing works fine.

Thanks for the thread.

Dano523

No worries, and with luck the block and crank are still fine, and will just be a mater of replacing the pistons down to the main bearings isntead.

M096865

Hopefully thats the case and the block and cylinder walls will be OK.

Should have some intial findings in a couple of weeks.

Icecap

https://www.zip-corvette.com/06-gm-s...ce-manual.html You mentioned that you were interested in a proper set of factory repair manuals. The above URL will take you to where I sourced my manuals last year. It is a 4 volume set with thousands of pages of detailed information. Too bad you need them for a 2006 since for some reason the 2007 manuals are nearly $100 cheaper than those before and after 2007. This could be because 2007 was the year of the largest production run of the C6.

Below is the actual publisher of the manuals that I listed above and it looks like they are listed for the same price as the first link above.

http://www.helminc.com/helm/product2...06Y&itemtype=N

M096865

Thank you icecap.

I will check it out. I'm certain they will be invaluable with detailed instructions.

Have a great day.
Scott

John Harry

Not at all. Half the secret of DIY is having the courage to jump in and do it. Of course, the other half is knowing what you're doing, having the skills, having the right tools, knowing people who can help, knowing when you're in over your head, - - - .

M096865

I can't agree more and that all starts upfront by doing all the research, reading, and asking tons of questions BEFORE you pick up thr first wrench.

This forum has been a tremendous help and I know will be as I go through this process.

More to come.
Scott