Replacement Cummins Block Drain O-Ring
Stop a coolant leak before it becomes a bigger coolant problem. This direct replacement seal is the small part that helps keep your block drain tight through every service interval.
Why This O-Ring Belongs in Your Service Kit
Direct Replacement Fit
Designed specifically for the Cummins engine block drain plug, so there is no guessing, trimming, or hoping a generic seal will do the job.
Built for Coolant Drain Cycles
The O-ring is engineered to hold up through repeated coolant drain and refill services — the kind of routine maintenance that can wear down an original or worn seal over time.
Preventive Maintenance Pricing
At a fraction of what a coolant leak can cost to clean up or ignore, replacing this seal during a scheduled drain is the smarter move. Keep a spare on the shelf so you do not have to delay service waiting on a part.
Stocked in Canada
Sourced and warehoused domestically, so North American diesel owners — whether you are in Alberta, Texas, or anywhere in between — can get the part moving quickly without surprise duties or weeks of wait time.
Confidence in Every Drain
Whether you are servicing a 5.9 or a 6.7 Cummins, this is the cummins block drain o-ring replacement you want on hand before you pull that plug, not after you have coolant on the floor.
Do not let an eight-dollar seal turn into a hundred-dollar headache — add one to your order and check it off the list.
FAQ
Is this a direct-fit cummins block drain o-ring replacement?
Yes. It is designed specifically for the Cummins engine block drain plug, so there is no guessing, trimming, or relying on a generic seal.
When should I replace the Cummins block drain O-ring?
Replace it during a scheduled coolant drain and refill service as preventive maintenance, before a worn or original seal turns into a coolant leak.
Should I keep a spare block drain O-ring on hand?
Yes. Keeping a spare on the shelf helps prevent a service delay if the seal is needed when the block drain plug is removed.
Is this O-ring useful when servicing a 5.9 or 6.7 Cummins?
Yes. Whether you are servicing a 5.9 or a 6.7 Cummins, it is the replacement O-ring you want on hand before pulling the block drain plug.