Need new crankshaft

[maetesmann]

Hello ... from Germany !

I'm in need of a new or rebuilt crankshaft for my 2013 3.5L Explo "Sport".

I know that Ford doesn't offer a single cranmkshaft but a short block only, which isn't an option for me ...
Does anybody here on the board has a relialible (!!) source where I can purchase one ?

Has to replace it b/c rod bearings of one cylinder have turned inside the rod's eye and caused scratches on the journal.
It's urgent and any help would be appreciated !

THX,
Martin,
Düsseldorf, GERMANY

 

[RonParise]

My experience is not recent and its not with a Ford, but I had a similar thing with a 1972 MG B. I found a machine shop that gave me two options 1) build up the damaged journal and then grind it down to original specifications or 2) Grind and polish all the journals and install oversized bearings. I chose option 2.

So, my advice is :....find a machine shop

 

[maetesmann]

Found 2 crankshafts on rockauto (https://www.rockauto.com/de/catalog/ford,2013,explorer,3.5l+v6,1503808,engine,crankshaft,5292)
for (all) 3.5L Engines (fits also all 3.7L which has just a bigger bore, hubs are all the same),
but these cranks are both for the naturally aspirated (non-turbo) engines only ... .
The two offered cranks have different forging numbers ... what does this say about ?
Can anybody tell me the differences and why shouldn't fit one of these two crankshafts into my 3.5L Turbo/Ecoboost Explorer ??
PLZ help me with any info ...

THX,
Martin

 

[peterk9]

Isn't the Ecoboost engine technically a 3.5L V6?

Peter

 

[imp]

My experience is not recent and its not with a Ford, but I had a similar thing with a 1972 MG B. I found a machine shop that gave me two options 1) build up the damaged journal and then grind it down to original specifications or 2) Grind and polish all the journals and install oversized bearings. I chose option 2.

So, my advice is :....find a machine shop

Grinding the journal reduces it's diameter, thereby necessitating SMALLER bearings.

 

[maetesmann]

Isn't the Ecoboost engine technically a 3.5L V6?

Peter

Yes, the 3.5 EcoBoost is built around the Duratec 35 (Ford Cyclone V6 engine) ...
(Ford 3.5 Ecoboost: Everything You Need To Know)

Grinding the journal reduces it's diameter, thereby necessitating SMALLER bearings.

No, you will need "bigger" bearings (+0.25, +0.50 or +0.75mm oversize)

A machine shop was my first thought also, but I would like to pull out the motor + tranny by myself if possible, to reduce cost.
But I have no lift so I will find I shop where I can hire a lift for a day or maybe two.
But once pulled out the car is sitting on the lift, without front axle/subframe, and a machine shop will take some days at least for grinding ...
During that time the lift is blocked ...
So that isn't an option for me.

But if I'd had a new or already refurbrished crankshaft here at hand .. it would be just a simple crank swap on a long weekend.
But .. I CAN'T FIND ONE MATCHING WITH ENGINE LETTER "T" !!
All crankshafts that are offered )rockauto / Enginetech) are for the non-turbo 3.5L engines only.
And from FORD you can only get a whole short block .. with pistons, connecting rods , bearings ... and, of course, a crankshaft.
Price ..?
Don't ask !!

 

[Josh P]

An oversized bearing has the same inside diameter but a bit more material on the outside diameter.

 

[imp]

An oversized bearing has the same inside diameter but a bit more material on the outside diameter.

I am missing or misunderstanding something here. Help, please. A CRANKSHAFT'S "throw" diameter determines it's BEARING SIZE, NO? Making the crank throw SMALLER necessitates a smaller bearing shell INSIDE DIAMETER, NO? So, yes, the outside diameter is larger, but when do we ever measure crankshaft bearing shells on their OUTSIDE DIAMETER?

I'm perplexed.

 

[Josh P]

I am missing or misunderstanding something here. Help, please. A CRANKSHAFT'S "throw" diameter determines it's BEARING SIZE, NO? Making the crank throw SMALLER necessitates a smaller bearing shell INSIDE DIAMETER, NO? So, yes, the outside diameter is larger, but when do we ever measure crankshaft bearing shells on their OUTSIDE DIAMETER?

I'm perplexed.

Oversized bearings find use in blocks that have been line-bored. Sometimes a spun bearing will damage the block, etc.

 

[RonParise]

Grinding the journal reduces it's diameter, thereby necessitating SMALLER bearings.

No, as you say, grinding down the journals reduces the diameter, increasing the space that the bearings fill. So you need larger bearings to fill that space

 

[Josh P]

We need a 5th grader to settle this.

 

[BKennedy]

Or, maybe, just maybe, you could start a entirely new thread for your argument and just leave this one to anyone trying to help the OP.

 

[Josh P]

There are engine rebuilders here in the USA that can sell a crankshaft, need to know the forging number. Professional engine rebuilders lists 2 for a 2013 on their website.

 

[RonParise]

Oversized bearings find use in blocks that have been line-bored. Sometimes a spun bearing will damage the block, etc.

Yea I don’t know what that is. As I said I’m no mechanic, I’m just sharing my experience and saying what I did with an old MG with a damaged crank shaft

 

[RonParise]

Or, maybe, just maybe, you could start a entirely new thread for your argument and just leave this one to anyone trying to help the OP.

I thought my experience might help the OP

 

[ecoboost_xsport]

Crankshaft from the Ford Raptor fits. You'll need the crank pulley as well. 100% plug and play. It's forged differently and stronger. Technically speaking, it's referred to as the High Output 3.5L TT.

Everything you need to know, including part numbers, is here:

Raptor Crank in a SHO!

I guess I should say that this is the High Output 3.5L Ecoboost crank, but raptor is more fun. I thought I would make a post separately for this as I think this is some good information for anybody going through a big build. This is all of the items you need for the Raptor Ecoboost to work in...

shoforum.com

 

[imp]

No, as you say, grinding down the journals reduces the diameter, increasing the space that the bearings fill. So you need larger bearings to fill that space

What does "larger bearings" mean? I maintain that first, bearing SHELLS are only HALF the bearing; the crankshaft journal is the other half. So, if you pick up a "3-under" bearing shell, it's INSIDE DIAMETER will be 0.003" SMALLER than a STANDARD SIZE shell's, but the OVERALL DIAMETER of the two shells clamped together will be the SAME, for both standard and undersize. No physics involved, or engineering, just common application sense.