XDP Crankshaft Dowel Pin Kit XD331

PART# XD331 | SKU XD331
★★★★★ ★★★★★ 5.0 (15 Reviews)

Vehicle Fitment For:
2001-2016 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML

See full application list below
$159.95

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Description

Avoid catastrophic engine failure from a sheared dowel pin in your 2001-2016 GM 6.6L Duramax with the XDP Crankshaft Dowel Pin Kit XD331. From the factory, your Duramax uses a dowel pin on the crankshaft to hold the balancer in place. In both stock and performance applications, these dowel pins are easily sheared causing the balancer to spin on the snout of the crankshaft. When the balancer spins, it can throw off the balance of the engine and create harsh vibrations. Continued operation in these conditions will likely result in serious engine damage such as a broken crankshaft.   

Eliminate the risks of engine damage and pin your crankshaft so the balancer stays in place with the XDP Crankshaft Dowel Pin Kit XD331. The Crankshaft Pin Kit includes a specially made jig so you so you can drill the crankshaft without requiring an engine tear-down, or a machine shop. Perfect for the toolbox of the at-home Duramax enthusiast, or a professional shop tech. The included drill bit allows for around 5 procedures to be performed before requiring a replacement. Each kit includes a jig, jig holding bolt, drill bit, pin, and installation instructions.
 
Features:
  • Engine Tear-Down Not Required 
  • Eliminates Factory Dowel Pin Failures
Application Notes:
If using PPE, ATI, or a Super Damper, the counter weight must be removed before installing drill collar. 
This tool is not currently compatible with the re-designed Fluidamprs made in 2020 and later that have 6-bolt holes on the face of the damper.

Reviews For XDP XD331

Overall Rating
5.0/5
15 Reviews
Rating Snapshot
5 ★
15
4 ★
0
3 ★
0
2 ★
0
1 ★
0
Verified Buyer
★★★★★ ★★★★★
Xdp crank pin kit
Mike (CA) | May 9th, 2026
This is something to think about doing before it's too late. Almost was for me. Not hard at all to do.
Verified Buyer
★★★★★ ★★★★★
Saved my Engine and some install tips
Troy (Texas) | September 13th, 2025
Following an oops moment and having to drill out and replace the original pin this kit was the saving grace. After the old pin sheared off it left the hole lopsided. Once I got the balancer back on and clocked correctly with the loose fitting original pin I installed this kit. Now my balacer is secure and does not move. Engine runs great. Special note if you are installing this in the truck, place a thin sheet of wood against the radiator to protect it. Second you may need to hang a pry bar in the PS frame hole to put pressure against the drill head. If you do it only by hand in the truck you can not get enough force for the drill to bite. You will burn up the drill bit this way and could work harden the crank and balancer making it impossible to drill. Also make sure to use brake clean to get the cutting oil off the balancer before putting the belt on. Do not use penetrant as cutting oil.
Verified Buyer
★★★★★ ★★★★★
Worked great
Jeff (Charles City iowa) | August 29th, 2025
This kit was very well built and it worked great for what I did. The dowel pin fit perfectly and maybe my balancer won't be spinning on the crank, definitely recommend.
Verified Buyer
★★★★★ ★★★★★
Crank dowell
David (MT) | June 29th, 2025
Worked great! Will definitely do this to every 6.6 I do from now on.
Verified Buyer
★★★★★ ★★★★★
Best kit ever
Alexjred3 (Tacoma Wa.) | April 10th, 2025
Thanks to the reviews made me feel comfortable to buy this kit, and when i received it, I used and worked as it should. Its a very nice kit thanks XDP im very happy and yes, I recommend it 100%.
Verified Buyer
★★★★★ ★★★★★
Can't say much
Justin (Arizona) | February 14th, 2025
Everytime I need something it's spot on. I did the crank drilling kit worked amazing. I have been buying from you and others non stop and just been upgrading the old lly and drag truck.
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Frequently Asked Questions

I upgraded to the fluidamper. Can I install this pin?
XDP Crankshaft Dowel Pin Kit XD331 is not currently compatible with the redesigned Fluidamprs made in 2020 and later that have 6-bolt holes on the face of the damper.
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More to Consider

Specifications For XDP XD331

MPN XD331
SKU XD331
GTIN 856217008663
ID 34922
Manufacturer Name XDP
Shipping Weight 2.00 lb.
Shipping Length 5 in.
Shipping Width 5 in.
Shipping Height 3 in.
Fuel Type Diesel
Prop 65 Prop 65 WarningWARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov
Internal L0R0

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