Overview — Pipe Thread Sealant 3375066
3375066 is the thread sealant specified in the Cummins service parts program for sealing threaded pipe joints on diesel engines, applied to oil, fuel, water and air line fittings. We can supply this sealant as well as related Cummins service products, in stock or available on order — welcome to enquire by part number.
Parts Characteristics
The sealant is a pipe-grade compound that fills the spiral clearance between male and female threads, preventing leaks under pressure without hardening so hard that fittings cannot be released later. It is resistant to engine oil, diesel fuel, coolant and compressed air, and it tolerates the temperature range seen on an operating engine. Application is straightforward: the compound is spread onto the male threads before assembly, and the fitting is tightened normally. Unlike tape, it does not shred and block oil passages when fittings are overtightened.
Applicable Models & Applications
This sealant is used across Cummins engine families wherever threaded pipe connections are made: oil pressure and return lines, coolant hoses with threaded adapters, fuel return fittings, air compressor lines and gauge connections. It is the recommended product for joints that must be leak-free on the first start after an overhaul. Keep a tube in the workshop for both engine work and general machine maintenance, since the same compound suits hydraulic gauge ports and pipe adapters.
Maintenance & Replacement
Clean both threads of old sealant and oil before applying a fresh coat — sealant applied over oil does not bond and will leak under pressure. Apply a thin, even layer to the male threads, leaving the first thread clear so sealant is not pushed into the bore where it could reach a valve or oil gallery. Tighten the fitting to the correct torque and wipe away excess compound that squeezes out of the joint. Check the fitting for leaks on first start and after the first hot run. Store the tube with the cap sealed and note the shelf life printed on the tube.
Price Reference (USD)
The reference price for this Sealant (3375066) is approximately USD 10 – 30 per unit depending on tube size, brand grade, quantity and shipping destination. This is a planning estimate only — confirm current pricing and availability with our sales team before ordering.
Value & Service
A single leaking pipe joint after an overhaul can cost hours of labour to chase, which is why we supply 3375066 verified against the original Cummins specification and ship it in stock quantities with fast dispatch. The product is covered by our quality assurance, and our technical team can advise on the correct sealant type for the fluid and temperature of your specific joint. Multiple tubes can be ordered at quantity pricing and combined with other service parts into one tracked shipment.
Racer Machinery is a dedicated construction-machinery parts supplier — send us your part number and machine model, and we will confirm fitment, price and lead time for this sealant and related Cummins service products.
