bearing / mod motor question

[TurboX2]

Here's the situation... I just got done installing a 5.4 3v in my truck. It had a slight tap initially that turned into a spun bearing with only a little running time. If I flip it and pull the crank, have it turned, and put new bearings in is that adequate or am I shortcutting something? Damn this sucks.....this project fought me every step of the way and then the motor is bad...

Thanks for help/advice.

[Sweet35th]

Here's the situation... I just got done installing a 5.4 3v in my truck. It had a slight tap initially that turned into a spun bearing with only a little running time. If I flip it and pull the crank, have it turned, and put new bearings in is that adequate or am I shortcutting something? Damn this sucks.....this project fought me every step of the way and then the motor is bad...

Thanks for help/advice.

Did it spin a main, or a rod? If it was a rod, replace that rod. If it was a main you really should have the block line honed....

I would also be looking into what caused the bearing to spin.

[TurboX2]

I don't know yet, I've got it half disassembled to pull back out. I wanted to exchange it for another but it had a 6 month warranty and I let it sit here for 8 months before I got it installed, the boneyard won't do anything with it. I'd like to just find another and deal with it later, know of anything healthy for sale?

Here's what it sounds like....

http://www.youtube.com/watch?v=63hvt1ju-T4

[jp67stang]

go open headers and call it good jk; that sucks

[RNSF]

HOLY SHIT @ the knock, sounded like a gang of midgets beating it with a hammer.

[Killer Capri]

HOLY SHIT @ the knock, sounded like a gang of midgets beating it with a hammer.

get used to it Mr. m90

[Killer Capri]

ive heard worse. i have a piece of cylinder wall to prove it.

[Sweet35th]

Ok so this was a junk yard shortblock? If so, it likely had gotten contaminated with debris that caused the failure, or the motor was junk when it got there.......Be sure to diassemble and clean your heads.

[Slow35th]

Where did you get the motor?

[TurboX2]

Ok so this was a junk yard shortblock? If so, it likely had gotten contaminated with debris that caused the failure, or the motor was junk when it got there.......Be sure to diassemble and clean your heads.

It was a complete '05 motor with 27k on it from AAA Auto Salvage in Rosemount. They have a 6 month policy but I bought it in April and didn't get around to starting the swap until a couple weeks ago, which is 2 months too long...

The only possibility I can come up with is if I didn't prime the oil system long enough...

Is it possible to lift the crank out with all the rods/pistons still in the block?

[MustangManiac]

Pretty nasty knock. My buddies 4.6L did the same thing when he spun a rod bearing. It was the top of the piston hitting the cylinder head. If it's a rod bearing you have to replace that rod for sure, so when you take it out I would inspect the piston crowns for any damage. We just replaced all the pistons with .030 over replacements to be done with it.

[wiplash]

Yes Dan, you can pull the crank out with the pistons/rods in the block.

[iamtheshaner]

It was a complete '05 motor with 27k on it from AAA Auto Salvage in Rosemount. They have a 6 month policy but I bought it in April and didn't get around to starting the swap until a couple weeks ago, which is 2 months too long...

The only possibility I can come up with is if I didn't prime the oil system long enough...

Is it possible to lift the crank out with all the rods/pistons still in the block?

There is your problem.

I'd be willing to bet it has a bent rod.......

The 05's had a few issues with injectors leaking..... If there was one run of 3 valves you should NOT buy used... it would be 05's.


I thought I remember warning you of this fact.... but if I am mistaken... I am also very sorry

[iamtheshaner]

Also, you may want to start doing some basic noise diagnostics before you tear it apart. People have torn down motors for noises this bad only to find no sign of visible damage.... not a frequent thing....but it happens.

kill each cylinder individually and listen for a change in the noise. This will identify what hole has the problem. If it is a main bearing issue, killing a cylinder won't really change it unless you kill the two cylinders adjacent from the bad main.

I'd get the valve covers off this before I removed it as well. If any of the material you find is magnetic - you have block damage (given the cam and roller rockers aren't wasted).

Was the motor complete when you got it? Did you remove the intake and check for debris?

Hindsight is always 20/20 but I don't give a fuck what warranty a used motor comes with. They won't pay for my time getting it in and out if it fails. It's always a good idea to stick it on a stand and check things like bearing clearances, cylinder wall condition and double check the intake for foreign objects. Simple non-intrusive checks to a longblock can save you hundreds of dollars, hours of time and handfulls of hair

[TurboX2]

Pretty nasty knock. My buddies 4.6L did the same thing when he spun a rod bearing. It was the top of the piston hitting the cylinder head. If it's a rod bearing you have to replace that rod for sure, so when you take it out I would inspect the piston crowns for any damage. We just replaced all the pistons with .030 over replacements to be done with it.

I don't see how a spun bearing made a rod longer....but either way the 5.4 has a ton more p/v clearance and a piston isn't gonna contact a head unless the rod broke.

I also installed a different converter and first thought maybe it blew up (if they can even make such a noise), but laying under the truck it definately sounds like its from the motor not the bellhousing...

This sucks big hairy donkey balls....this project fought me every step of the way and after I get it all figured out the motor goes bad.... I know the '05s had a few injector issues, but the overall percentage and therefore risk is very low. The other problems people jump on like the phasers were taken care of in this case anyway...

I'm looking around for something cheap to buy and drive for a couple months, I don't have any time to work on this thing right now.