So after my 02' WS6 sat for a little over a year, I went to start it up yesterday and it started for a second and then I heard a boom, and it shut off. After some investigation we found that the rear right rod flew off and punched a small hole through my the bottom side of the engine block. Now It's stuck and won't start. The motor has only 89k miles and the motor was full of perfect, new oil from last season. There were no metal shavings in the oil when we jacked it up and drained the oil.

My question is, does anyone here know if it's possible to replace the furthest back rod's from the bottom of the vehicle WITHOUT pulling the motor? I realize we may have to jack it up to get some more room and drop the oil pan.

I cannot find any information online about this, so I was hoping someone here could help.

 

Possible probably, but the engine isn't really that hard to remove. It be way easier, also there is a hole in the block? I bet there is more damage then you see, cylinder and head probably are trashed. So in short, remove engine and inspect.

 

^^^ This...

 

If there's a hole in the side of the block, it's a moot point. The engine needs to be replaced.

 

I have to ask if it was sitting outside, I know Fbodies can leak water from the cowl to on top of the intake manifold and the water can seep into the engine and this exact problem can happen.

But as far as removing the rod from the bottom, Its not that simple. You need to remove the piston to press the wrist pin to remove the broken rod as well as the installation of the new one. Maybe I just misread the interpretation of can you remove it while the engine is still in. If I did then removing the head and moving forward is possible with the car in but its going to be a tougher job then having it on an engine stand.

Hope this helps

 

If there is a hole in the side of the block, you need to replace at the very least the block and whatever broke inside of it. I'd personally just keep the car parked and build a motor to swap in its place, no other option really.

 

Exactly, hole in block /thread

 

It probably hydrolocked. Most likely, water got past the cowl, sat inside the injector oring and leaked past into the cylinder. Engine is toast.

 

Not possible to replace connecting rods from the bottom so whether or not the hole is fixable is moot.

 

When my car is sitting, I always put a plastic bag over the engine. This is what got in your engine. My car sat for exactly a week with two days being 100% rain those two days. If you haven't had time to seal up the cowl like me, put a plastic bag over the cowl and raise up the hood and put a plastic bag over your engine. Looks ghetto, but atleast you know your engine wont go to **** when you crank it up.

 

If there is a whole in the block why even ask about replacing the rod? The engine block is junk. The only thing to do I pull it out and replace the block. You cant fix it in the car and the block will have to go to the shop for a repair if you plan to keep that block. I would build another engine.

 

Sure it's possible...but the bigger question is what are you going to do about the hole in the side of the block you mentioned? You plan on just running the engine like that or simply patching that hole with some JB weld?

 

Here is the other issue. Yes, you should be able to get the piston out of the bottom. BUT, you will not get the new one in. You have to use a ring compressor to get the piston rings inside the cylinder and this isn't going to be done from the bottom. You will have to remove the head, and since you have to remove the head to get the new piston in, you might as well pull it from the top.

 

Pretty sure this thread is over already

 

Yea me too.

 

seems like the op vanished....I'll by the car for 1500 and swap in a motor! lol

 

Pistons won't come out the bottom. The main webs are closer together than the bore diameter in like 99.9% of all engines, including the LS engines. If the piston won't come out, the rod won't either. The head always has to come off to replace a piston or rod.