88mm turbo diesel forged crank identification

[Jamesgti6 0]

Good afternoon, I am having an engine rebuilt that is going to need oversized pistons so have decided to see if I can find the bits to go to 2.1L.

 

can anyone help me with identifying the forged crank? I can’t seem to find a definitive answer on the forums.

 

the first with 4 weights looks to be forged even though the seller says it’s from a N/A 406.

 And the second with 8 weights looks cast to me.

 

any help would be greatly appreciated.

[welshpug 1,622]

Needs to be a turbo diesel crank,  I've never compared them side to side but I have read that the parting line of the casting is wider on the forged turbo crank.

 

The DW10 uses the same part number crank.

[petert 550]

Forged cranks only have four counterweights and the wide parting line. There are a few variations however, thus don’t all look identical.

[SRDT 146]

To tell whether a part is made out of forged steel or cast iron the size of the flash lines is a dead giveaway.

Forging flash is wide, there is plenty of extra material that needs to be removed by shearing. Casting flash is thin, only a bit of molten metal can found its way between parts of the mold.

 

There should be no stock 88mm stroke, 8 conterweights, forged crank. Those with 4 conterweights have Ø50mm 24mm wide crank pins with or without rolled fillets.

This last part is important because cranks without rolled fillets needs wider thrust washers :

[Jamesgti6 0]

Thanks everyone, looks to be the correct crank even though the guy says it came from an n/a, always thought all 406’s were td.

[Jamesgti6 0]

21 hours ago, SRDT said:

To tell whether a part is made out of forged steel or cast iron the size of the flash lines is a dead giveaway.

Forging flash is wide, there is plenty of extra material that needs to be removed by shearing. Casting flash is thin, only a bit of molten metal can found its way between parts of the mold.

 

There should be no stock 88mm stroke, 8 conterweights, forged crank. Those with 4 conterweights have Ø50mm 24mm wide crank pins with or without rolled fillets.

This last part is important because cranks without rolled fillets needs wider thrust washers :

 

Thanks, I wonder if the rods could be ordered wider to use standard thrust washers?

[petert 550]

Std rods fit the 88mm turbo diesel cranks. T16 86mm and 92mm diesel are 24mm wide.

Edited December 17, 2023 by petert

[welshpug 1,622]

15 hours ago, Jamesgti6 said:

Thanks, I wonder if the rods could be ordered wider to use standard thrust washers?

Thrust washer is on the main bearing not big end.

[SRDT 146]

On 12/17/2023 at 3:10 AM, petert said:

Std rods fit the 88mm turbo diesel cranks. T16 86mm and 92mm diesel are 24mm wide.

24mm is standard, "wide" 26mm rods are only used on 2.1 diesel, T16 and N/A 2.0 8v up to 01/1993.

[petert 550]

I was actually thinking of the shell width, which is either 20 or 22 wide. I was incorrect either way.

 

I acquired an XU10J2TE thinking it would have a forged crank. I was disappointed to find cast iron. They're 0501G1 like the rest.

Edited December 28, 2023 by petert

[SRDT 146]

The XU10J2 has some of the good bits but not all, same thing with the XUD9SD : it's a 75hp 1.9 diesel turbo with mostly N/A bits inside.