Description
Power Driven Diesel | Billet Tappet Cover 12 Valve
Power Driven Diesel’s new Billet Tappet Cover for 12v Cummins was created to resolve several issues presented by existing tappet covers on the market.
First, all of them require RTV on the bolts in order to not leak from under the heads. PDD’s Billet Tappet Cover uses o-rings under the bolt heads to ensure long term, leak-free performance.
Finally, economically-priced tappet covers offer nothing in the way of baffling for the crankcase breather ports. This results in excessive oil discharge from the crankcase. Correcting this requires installing a catch can or converting to overhead breathers. PDD’s new design features dual 3/4″ NPT ports and a basic baffle system that reduces oil discharge by as much as 60% relative to unbaffled ports, while keeping the price point competitive.
Tappet cover bolts torque to 18 ft-lbs. We recommend using small dabs of RTV in the corners to help hold the cord stock gasket in place during installation, and a dab where the cord overlaps to ensure leak-free installation. If the vent ports will be used, install the baffle plates using red Loctite on the screws.
Includes hardware and seal kit
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.
- Estimated delivery 2–7 business days depending on your location.
Freight question? Call us on (07) 5619 7869.
Power Driven Diesel | Billet Tappet Cover 12 Valve Power Driven Diesel’s new Billet Tappet Cover for 12v Cummins was created to resolve several issues presented by existing tappet covers on the market.
Double Duty Diesel — Manufacturer Pass-Through Warranty
Double Duty Diesel parts carry the original manufacturer's warranty:
- Fluidampr — Lifetime warranty on harmonic balancers
- MAHLE / Clevite — 12 months on bearings, gaskets, sealing components
- Dynomite Diesel — 12 months on stock-spec injectors and pumps; performance/race spec varies
- Power Driven Diesel — 12 months on turbos and bundled tuning kits
- Returns must be notified within 30 days of delivery
- Parts only — installation not covered
Workshop fitment available at Willys for transmissions, injectors and engine internals.
Read the full Double Duty Diesel warranty terms →
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.
