Engine rebuilds in-house
We rebuild engines at our Oxley and Warana workshops. Ask us for a price on the full job.
Get a fitting quote- Returns within 30 days
- 12 month warranty
- Fitting available
Double Duty Diesel Engine Internals Gaskets & Seals
Cummins 4BT / 6BT Front Oil Seal Kit
- Fits Cummins 1st Gen (1989-1993)
- Fits Cummins 2nd Gen (1994-2002)
- Fits 4BT
- Fits 6BT
$66.00
Including GST
or 4 interest-free payments of $16.50 with Afterpay on orders up to $2,000Zip and humm are available over the phone: (07) 5619 7869
Will it fit your vehicle?
| Make | Model | Series | Years | Engine |
|---|---|---|---|---|
| — | — | — | — | 4BT |
| — | — | — | — | 6BT |
| Dodge / Ram | Cummins 1st Gen (1989-1993) | — | 1989 – 1993 | 6BT |
| Dodge / Ram | Cummins 2nd Gen (1994-2002) | — | 1994 – mid-1998 | 6BT |
A dash means the listing does not narrow it down that far (for example no build dates are listed). Check with us if your vehicle was built near a model change.
Years are as listed by the manufacturer/supplier and may be US model years for US-built trucks.
Fitment listings are a guide. Not sure? Send us your rego or VIN and our team will check the part for your vehicle, before or after you order.
Check my fitmentor call(07) 5619 7869or text0485 885 957oremail us
Cummins 4BT / 6BT Front Oil Seal Kit If you find your front seal is leaking oil, this is for you! Kit Includes: 1 x Front Oil Seal Kit Plastic Install Sleeve Please Note: This oil seal can be used on a standard crank oil seal surface…
Description
Cummins 4BT / 6BT Front Oil Seal Kit
If you find your front seal is leaking oil, this is for you!
- 1 x Front Oil Seal Kit
- Plastic Install Sleeve
Specifications
| Part number | 3900709 |
|---|---|
| In the box | 1 x Front Oil Seal Kit; Plastic Install Sleeve |
| Brand | Double Duty Diesel |
| Shipping weight | 1.5 kg |
| Shipping dimensions | 25 × 20 × 12 cm |
Warranty: 12 months from Willys Workshop
Sold and warranted by Willys Workshop. Parts carry our 12-month warranty against defects, from the date of purchase or installation (whichever is later), subject to any manufacturer terms and fair wear and tear (Terms & Conditions, clause 7.1(b)). This is in addition to your rights under the Australian Consumer Law, which cannot be excluded.
- 30-day change-of-mind returns on eligible items: unused, uninstalled and in the original packaging, with a Return Authorisation from us first. A 15% restocking fee applies and return postage is at your cost.
- Wrong fit: if a part covered by our Fitment Guarantee doesn’t fit, we pay the return freight both ways and there’s no restocking fee.
- Special-order or imported-to-order items, electrical parts, ECUs and tuners once registered, connected or flashed, parts that have been fitted or modified, and clearance items can’t be returned for change of mind. Your rights for faulty goods still apply.
- Refunds are made to your original payment method within 14 business days of us receiving and inspecting the return.
Full details: Returns & Refund Policy and Terms & Conditions.
Warranty claims are coordinated through Willys Workshop. Email sales@willysworkshop.com.au or call Warana (07) 5619 7869 / Oxley (07) 3377 3421 with your order number and a description of the issue.
Shipped Australia-Wide
- Dispatched from within Australia with tracking.
- Same-day dispatch on in-stock orders placed before 11am AEST, Monday–Friday.
- Shipping is calculated at checkout based on size, weight and your delivery address.
- Delivery usually takes 2–10 business days after dispatch, depending on your location.
- Need your tracking number? Once your order has shipped, email sales@willysworkshop.com.au with your order number and we’ll send you the carrier and tracking details.
Freight question? Call us on (07) 5619 7869.
Cummins 4BT / 6BT Front Oil Seal Kit If you find your front seal is leaking oil, this is for you!



