Ouch, You had to take it to the dealer, That is going to hurt more than the damage.

 

I know! I'm not that good when it comes to the engine so I took it to them. But I don't even think they know what they are doing. They have had it since Wednesday and still don't know anything except maybe bad lifters.

 

They are parts exchangers.....not real service technicians. You'll be lucky to get a guy who "knows" what he's looking at.

 

You would be better off finding a good independent shop that specializes. Ask for some recommendations in your area and go there. Just my opinion based on school of tough knocks.

 

Might have them do a leak down test on each cylinder to make sure no valves were bent.

It's more likely bent pushrods, which will make the valve train sound like it has bad lifters. If the pushrod is bent too much, the lifters can't keep the vavle train at zero lash anymore.

 

Can't add much more, just hope things are not too bad and you get the car back on the road again soon.

 

Exactly.

 

that's a very true statement. I would find someone besides the dealership.

 

compression and leakdown test will let you know if you floated the valves and bent one. (thats gonna be pricey at the dealer). If its a bent pr or broken spring, I suggest to change it yourself, pretty easy job.

 

Ok, so I finally found out what the problem is with my engine. The dealer said I have bad rocker arms and lifters. They wanted about $2800 in total for parts and labor so I declined. If anyone could help me find some good replacement parts I would appreciate it. I am also thinking I should go ahead and replace my pushrods anyways since I probably over stressed them. All help is appreciated!!!

 

In my area, the dealer is considered THE Vette specialist in the area. So not all dealers suck!

 

Ouch!!!

 

So the pushrods are OK? In an extreme over-rev situation like you had, the pushrods are usually the first thing to fail. I really can't see how rocker arms would fail. Did they show you the damaged rockerarms?

Did they know that the engine was over revved? ... of did you just tell them it was making noises?

 

I agree, your rocker arms would be the very very very last thing to go on an extreme over rev. Your push-rods would be first and normally they will bend because your springs weren't strong enough to keep up with 8500 rpm the valves went out of whack and they hit the top of your piston. Push-rods just don't bend on their own unless they are really really cheap and gm didn't slack to bad on the push-rods in these motors.

So, if you have a bent push-rod you need to do a leak-down test on the cylinder that the bent push-rod came out of to see if one of the valves is toast.

Second, if you get a lifter going out in an 8500 rpm situation your cam is probably going to be pretty messed up because the roller failed on the lifter.

Third, the only way your rocker would be screwed up in that situation is if the push-rod was bent, when the push-rod was being bent all that force was put on the rocker and jacked it up, other then that, in an over rev your lifters and rockers aren't going to fail BEFORE your push-rods and springs.

i hope that didn't get confusing but i have seen this done many times before by a lot of people and it always comes down to push-rods and springs, and if you have the stock single springs and one broke you better be praying that the retainer is still holding on to that valve or its really abusing that piston right now.

DO NOT DRIVE IT tow it from the stealership and take it to a performance shop in your area, or being as valve-train is pretty straight forward on these motors you can buy the parts and do it yourself or find a forum member close to you that knows what hes doing and have him help you or walk you through it on the phone.

Ask the dealership if they pulled the heads, because if they didnt they arent going to know its a bad lifter anyway so they are full of it. I would bet they heard it ran and said its lifters and rockers, found the price and labor and wrote you up a quote, when they actually go to fix that they will find whats really wrong and charge you to replace all of it.

Drew

 

They knew I over revved it. I even told them how I did it. They didn't show me anything, I was at work when they called. I will just take their word for it. I am just going to replace the pushrods, rocker arms, and lifters just to be safe. I have it at the house now just waiting, I won't drive it in this condition. If anyone lives near Las Vegas and wants to help me, it would be appreciated! I'm going to order the parts tonight and I should be able to fix it this weekend!

 

Have done this to my trans am. Just bent a pushrods. Easy fix

 

You could try Leading Edge Performance (LEP) in Vegas.

The only experience I have with them is I bought my Z from a dude in Vegas and they built his short block 383 - and it still hauls azz.

Good luck.

 

This is an old practice I learned from a old German mechanic when I was young, If you can let the push-rod roll across a pane of glass, you'll know right away which ones are bent. And for gods sake, find a Corvette shop or a Corvette club and see what they can direction you to a shop you need to go see. I know of only one GM/Chevrolet dealership who has a 'Corvette only technician'. He works four days a week and only does Corvettes) for them. Good luck with the repairs. And you've just learned a whole lot about speeding and shifting the transmission. On the other hand, look at the bright side, your transmission isn't wreaked !

 

If you have a stock shifter, consider getting the C6 shifter, its a drop in replacement. Although if you do this, remember to lock the neutral and mark the original shifter position before it is removed so the new one can be installed without problems.

Good luck with your repairs.

Another good recommendation is, buy a set of factory service manuals. Gene Culley (forum gm parts guy) can help you on parts and manuals.

 

shortly after i got my car, i accidentally hit 1st on a downshift instead of 3rd! i was so scared of this exact situation, but then i realized i was only doing about 40mph, so it was still within the safe RPM range

hope you get it sorted out. and while you're in there, go ahead & get some hardened pushrods and some better springs. the yeller LS6 springs go pretty cheap nowadays.

physics > electronics

i love my C6Z shifter