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Caterpillar 438-3416 is the yellow painted fuel common rail: a long body with six injector line outlets, an inlet union and the pressure limiting valve fitted on a riser. It is used on Caterpillar C6.4 and C6.6 engines. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Fuel Common Rail |
| Replaces | Caterpillar 438-3416 |
| Engine | Caterpillar C6.4, C6.6 |
| Machine | Caterpillar 320D, 323D |
| Fits | Caterpillar C6.4 and C6.6 engines in 320D and 323D excavators |
| Condition | New, aftermarket |
| Stat. HS-Code | 840999 |
| Country of Manufacture | China |
Caterpillar machines
Check the part number on your old unit before ordering.
| Caterpillar Part No.(SPM Part No.) | Fits |
|---|---|
| 438-3416(SPM-HEP-5165) | Caterpillar C6.4 and C6.6 engines in 320D and 323D excavators |
Fuel leaks at the rail
Cracked rails and worn outlet seats leak fuel under high pressure. That is a fire risk and the rail must be replaced.
Low rail pressure codes
A rail with a faulty pressure limiter or sensor seat lets pressure fall and the ECU logs rail pressure faults.
Engine rebuilds
A new rail is a sensible fit when the injectors and high pressure pump are replaced, so old debris does not reach the new injectors.
Fitting tips
Work clean, fit new high pressure lines or check the old ones' seats, torque the fittings to the engine maker's figure and bleed the fuel system.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| SINOCMP | USD 259.00 | 2 Nov 2026 |
| eBay, aftermarket seller | USD 318.00 | 2 Nov 2026 |
| Fab Heavy Parts | USD 682.07 | 4 Nov 2026 |
| Buy Machinery Parts | USD 730.79 | 4 Nov 2026 |
| YEM Parts | USD 739.25 | 4 Nov 2026 |
| Spare Part Mart | USD 148.78 | Today |
Our price of USD 148.78 is 43% to 80% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Yes, it was made for the Caterpillar C6.4, and 2 more listed under compatible equipment. Check the old common rail is marked 438-3416 or one of the cross references, because makers change parts between serial ranges.
On the Caterpillar C6.4, it depends on hours and working conditions. Follow the machine service schedule, and change it when it shows wear rather than waiting for it to fail.
Leaks, noise, loss of performance, or visible wear compared with a new part. If in doubt, measure it against the sizes in the specifications.
Match the part number on the old common rail to Caterpillar 438-3416 or a number in the cross reference table. If the number is worn off, compare the sizes in the specifications.
Yes. Every order is covered by our 30 day money back guarantee. Keep it unused and in its packaging.
No. It is an aftermarket common rail made to replace the Caterpillar 438-3416. It is not made by the original manufacturer; the number only shows what it replaces.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
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Join Marty Mates and we put 200 points on your account, worth $10 off an order over $75 USD. Then a point for every dollar you spend after that.
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