Buy 457-3636 - Genuine CAT Turbocharger for C7.1 - wisentpartscenter.com

Description

Cat 457-3636 Turbocharger – Genuine Caterpillar Garrett Turbo for C7.1

The Cat 457-3636 is a genuine Caterpillar turbocharger built by Garrett for the C7.1 ACERT. It is a fixed geometry journal bearing unit, no variable vanes and no actuator, so boost is controlled by the housing sizing rather than electronically. 457-3636 runs a 62mm compressor inducer and 64mm turbine exducer on Tier 4 Final C7.1 engines rated around 275 hp.

Key Functions:

- Uses exhaust energy to compress intake air and raise boost pressure
- Fixed geometry design, no actuator or variable vanes
- Journal bearing cartridge running on engine oil pressure

Fitment & Specifications:

- Engine C7.1 ACERT, 7.01L six cylinder, Tier 4 Final
- Garrett GTC3782B, fixed geometry, journal bearing
- Compressor inducer 62mm, turbine exducer 64mm
- Excavators 329F L, 330, 330 GC, 330F L, 330F LN, 333, 335, 336, 336 GC
- C7.1 industrial engines
- Wheel feller buncher 2570D

Verify by engine serial number before ordering. Gaskets and seals sold separately.

Purpose of the Part

457-3636 uses exhaust gas to spin the turbine, which drives the compressor on the other end of the shaft and pushes more air into the engine than it would draw on its own. More air means more fuel can be burned, which is where the power and the efficiency come from. Since this is a fixed geometry unit there is no actuator or vane control, the housing and wheel sizing set how it behaves. The cartridge rides on engine oil, so oil supply and drain condition is what determines how long 457-3636 lasts.

Issue Symptoms / When to Replace

Common signs are low power and low boost, black smoke, a whine or siren noise that changes with engine speed, oil in the intake or exhaust, blue smoke, and shaft play you can feel by hand at the compressor wheel.

Almost every turbo failure traces back to oil or debris. A restricted oil supply line starves the bearings, a restricted or twisted drain line pressurizes the housing and pushes oil past the seals, and dirt through a bad air filter or a leaking intake boot wipes out the compressor wheel. Find the cause before installing 457-3636 or the new one goes the same way.

Check the wheels for contact damage and missing blades, check shaft play, check the oil supply and drain lines for restriction, and check the intake side for leaks or debris.

Brand Information

This turbo is built by Garrett and sold under both Caterpillar and Perkins part numbers, since the C7.1 and the Perkins 1206 share the same engine family. Cat specifies the wheel and housing sizing to match the C7.1 fuel map and Tier 4 Final calibration. That matters on a fixed geometry unit because there is no actuator to compensate, the boost curve is set by the hardware. A turbo with slightly different wheel sizing will bolt up and still leave the engine down on power or throwing boost pressure codes.

Installation Notes

1. Find out what killed the old turbo first, oil restriction, debris or a failed air filter will take out 457-3636 the same way.
2. Check the oil supply line for obstructions and the drain line for restriction.
3. Clean out the intake and charge piping, any debris left in there goes straight through the compressor wheel.
4. Change the engine oil and filter, and inspect the air filter and intake boots for leaks.
5. Mount 457-3636 with new gaskets and seals, they are not included.
6. Prime the cartridge by filling the oil inlet with clean oil before connecting the supply line.
7. Crank the engine with fuel disabled until oil pressure builds, then start and idle a few minutes before loading it.
8. Check for oil and exhaust leaks at idle before returning the machine to work.

How to Identify an OEM Part

A genuine unit has a Garrett nameplate on the housing with the Garrett part number and a serial number, stamped or peened into the tag rather than engraved, along with the Cat part number. Check the numbers match what you ordered and that the housing castings and machining look clean and consistent. Copies often have rough casting finishes, engraved tags, or duplicate serial numbers, and the branding is printed on instead of cast in.

Why Buy 457-3636 from Wisent Parts

  • ⏱️
    Fast shipping
    Orders before 12PM EST ship same business day.
  • 🛡️
    180-day warranty
    All parts covered from delivery date.
  • ↩️
    Easy returns
    30-day returns.
  • ✅
    Verify fitment
    Send VIN/ESN and we’ll confirm.

Shop with confidence

Warranty & Return Information
Warranty Information

Wisent Parts offers a 180-day warranty on all parts from the date of delivery. This warranty covers orders placed directly through our website. If a part fails during this period, we’re here to help - whether it’s a replacement, repair, or refund. For full details, refer to the Warranty page.

Return Information

Wisent Parts accepts returns within 30 days of delivery. All returns are subject to a restocking fee. To qualify, parts must be unused and in their original condition. For full return instructions and restocking fee details, please refer to the Returns page.