ONAN 509-0289 - VALVE STEM SEAL ONAN/CUMMINS - Original OEM part
ONAN
- Payment methods
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- SKU:
- ONAN 509-0289
- MPN:
- 509-0289
- Availability:
- Ships (leaves our warehouse) within next business day if in stock
- Shipping:
- View Shipping Rates


Available Inventory
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Competitive Pricing
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Customer Support
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Description
- Engineered to deliver uncompromising sealing excellence for peak engine health
- Crafted from premium materials to resist wear and maintain tight valve control
- Designed specifically to exact ONAN specifications for flawless compatibility
- This is an authentic ONAN OEM replacement, guaranteeing original quality and performance
ONAN 509-0289 VALVE STEM SEAL - Precision in every seal, power in every engine
The ONAN 509-0289 Valve Stem Seal is essential in maintaining your engine’s optimal oil control and preventing leaks that degrade performance over time. As a genuine OEM component, it offers lasting reliability and exact fitment to extend equipment life. Ensure dependable operation by choosing this authentic part now—your engine deserves nothing less than true ONAN quality.
Distinctive feature that makes a difference
- Highly durable construction minimizes wear and protects valve stems from oil leakage
- Replacing worn seals promptly prevents costly engine damage and preserves efficiency
- Act now to maintain smooth engine operation with genuine ONAN precision parts
Details
Category: Valve Seals-Engines Parts
Product SKU: ONAN 509-0289
We are committed to helping you find the perfect ONAN replacement part for your needs. Our support team is ready to provide expert guidance via our help center to ensure your purchase is smooth and satisfying. We genuinely wish you successful repairs and dependable equipment performance for years to come.
Returns Information
You may return new, non-used, and unopened items within 30 days of delivery date under a 20% re-stocking fee in case you do not need it anymore or you have ordered a wrong item.
We cannot accept any returns on "Pumps, Motors, Electrical Items & Transmissions" whether the product is used or new, however in rare cases we may allow an exception under a 40% re-stocking fee.
If you need to return an item, please go to our chat located in the lower right corner, select the option “Returns” and follow the steps to submit your request. Please have on your hands pictures of the item, they will be requested. You will shortly receive an answer from our Customer Service Team providing authorization and return instructions. Likewise, if an exception cannot be authorized, you will receive an answer from us. No returns will be accepted in our warehouse without an RMA number (Return Merchandise Authorization).
All return shipping costs are on customer's responsibility and will not be refundable.
Returns are inspected once they arrive. If the inspection determines that the items are used, non-resellable condition, or damaged, the return will be denied and the customer will be contacted to ship the parts back at the customers' request and cost.
Cancellations
You may cancel your order, in whole or in part, only if the part is backordered and it isn't ready to ship. Once an order has been shipped, sent from the supplier to our warehouse, or in the dispatch line, we cannot cancel it. If your order is shipped, you will need to follow our return policy to return the items you no longer want.
If you need to cancel an order or item for any reason, you may submit a cancellation request directly through your account to the "more options" section or contact us by live chat. All the cancellation requests are evaluated before its approval. If you submit a cancellation request out of business hours, on a weekend or holiday, it will be processed on the next available business day.
Please allow for the cancellation to be confirmed, and check your account for updates on the status. The cancellation process usually takes 24-48 hours to be confirmed by email. We will process your cancellation request and issue a refund to your original payment method.
In the event that an item becomes no longer available (NLA), we will cancel it from your order and ship the remaining items to you. We will send you an email notification if we cancel any part of your order.
Some products may contain chemicals known to the State of California to cause cancer or reproductive harm. ⚠️ WARNING: www.P65Warnings.ca.gov