Replacement of the engine water pump and fresh Subaru Super Blue Coolant. Cost varies significantly between timing-belt driven EJ engines and chain-driven FB/FA engines.
Reviewed by SubaruReview Editorial Team · Last reviewed 2026-05-15 · Editorial standards
How this repair stacks up against the other common Subaru engine jobs — useful when you're sequencing what to fix first.
| Repair | Cost range | Labor | Parts | DIY |
|---|---|---|---|---|
| Subaru Water Pump Replacement Cost (this page) | $400–$1,150 | 2.5–6 hrs | $150–$350 | 4/5 |
| Subaru Head Gasket Replacement Cost | $1,800–$3,200 | 12–16 hrs | $350–$650 | 4/5 |
| Subaru Oxygen Sensor Replacement Cost | $200–$450 | 0.5–1.5 hrs | $80–$280 | 2/5 |
| Subaru Timing Chain Replacement Cost (FB Engines) | $1,600–$2,800 | 8–12 hrs | $550–$850 | 5/5 |
| Subaru Timing Belt Replacement Cost | $750–$1,450 | 4–6 hrs | $350–$550 | 5/5 |
| Subaru Turbo Replacement Cost | $1,850–$3,800 | 5–8 hrs | $1200–$2600 | 4/5 |
This repair is part of our Subaru repair-cost database and connects back to the engine-family guides where we cover why each failure happens.
Bearings fail over time due to high mileage, or the internal mechanical seal weeps coolant from the 'tell-tale' hole. This is common on EJ253/EJ257 engines during timing belt cycles, and on FB20/FB25 engines due to gasket degradation or bearing noise.
A failing pump will eventually seize or leak catastrophically, leading to rapid engine overheating and warped cylinder heads (head gasket failure). In EJ engines, a seized pump will snap the timing belt, causing total engine destruction (interference engine).
Expect $400–$1,150 at most US shops, parts plus labor.
2.5–6 labor hours typically.
Yes — DIY difficulty 4/5.
A failing pump will eventually seize or leak catastrophically, leading to rapid engine overheating and warped cylinder heads (head gasket failure). In EJ engines, a seized pump will snap the timing belt, causing total engine destruction (interference engine).
Cost, labor-hour, and parts-price ranges on this page are aggregated national-average estimates. Individual figures are not tied to a single primary source and should be treated as directional — request a written quote from a Subaru dealer or an independent Subaru specialist before booking work. See our editorial standards for how we build these ranges.
No primary source is currently cited for the specific figures on this page. Treat quantitative details as directional pending verification — see our Corrections Policy to help us update it.
Independent Subaru specialists usually come in $300–$1,000 below dealer pricing on the $400–$1,150 range shown above, without giving up OEM parts. See real quote breakdowns in the Subaru repair-costs hub.
The most common trigger is AC Compressor Failure, documented with symptoms, root cause, and a permanent-fix path. Fixing the underlying failure first is what stops you from paying for this job twice.
Bundling engine work at one visit almost always beats paying labor twice. Owners on this platform also price out Subaru Head Gasket Replacement Cost and Subaru Oxygen Sensor Replacement Cost at the same appointment.
Yes — we rate it 4/5. Follow the job-steps checklist above and the money-saving tips, and cross-check the reliability hub for related failures worth inspecting while you're in there.
It's tracked inside our Engine Guides cluster alongside every related failure and fix. Browse all topic hubs to see repair cost in the context of the underlying engine or drivetrain issue.
Dig into the Problems Database to plan your next maintenance sprint, or browse every model hub for buyer's guides, generation breakdowns, and known-issue lists.