Description
491 Fuel Filter Bowl Wrench — The Right Tool for 495/496 Hyaline Bowls
The iFJF 491 bowl wrench is purpose-built for the 495-4 and 496-series fuel filter bowls. Unlike generic strap wrenches or channel locks that slip, gouge, or crack the hyaline (clear plastic) bowl, this wrench grips the bowl's flats precisely — delivering the torque you need without the damage you don't.
Key Features
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Perfect Fit, No Damage: Engineered with a 3.35" (85mm) inner diameter that mates perfectly with the 495-4 and 496 bowl flats. No metal jaws biting into plastic — the wrench contacts only the designed wrench flats.
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Hyaline-Safe Design: Clear fuel filter bowls are made from rigid polymer that cracks easily under point-load pressure from generic tools. This wrench distributes force evenly across the flats, eliminating stress cracks that lead to air leaks and fuel drips.
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Durable Steel Construction: Heavy-gauge stamped steel with a corrosion-resistant finish. Won't flex or spread under torque.
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1/2" Square Drive or Wrench Compatible: Accepts a standard 1/2" ratchet or breaker bar, or a 24mm socket/wrench on the hex head for tight-clearance installations.
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Universal for 495/496/497 Series: Fits all 495-4, 495-3/4, 496, 496-3/4, 497, and 497-3/4 hyaline filter bowls — covers the complete iFJF fuel tank filter lineup.
Compatibility
| Filter Bowl Model |
Bowl Material |
Compatible |
| 495-4 Fuel Filter Bowl |
Hyaline Polymer |
✅ Yes |
| 495-3/4 Filter Bowl |
Hyaline Polymer |
✅ Yes |
| 496 Fuel Filter Assembly |
Hyaline Polymer Bowl |
✅ Yes |
| 496-3/4 Filter Assembly |
Hyaline Polymer Bowl |
✅ Yes |
| 497 Fuel Filter Assembly |
Hyaline Polymer Bowl |
✅ Yes |
| 497-3/4 Filter Assembly |
Hyaline Polymer Bowl |
✅ Yes |
Specifications
| Specification |
Value |
| Part Number |
491 / B10-AL |
| Inner Diameter |
3.35" (85mm) |
| Material |
Stamped Steel, Corrosion-Resistant Finish |
| Drive Size |
1/2" Square Drive + Hex Head |
| Hex Size |
24mm |
| Fits Bowl Models |
495-4, 495-3/4, 496, 496-3/4, 497, 497-3/4 |
Why You Need This Wrench
If you've ever tried to remove a 495/496 fuel filter bowl with a strap wrench, you know the frustration — it slips, it scratches, and you end up overtightening it on reinstallation just to get a seal. The 491 wrench eliminates that. It engages the bowl's designed flats, giving you positive control for both removal and installation. No more cracked bowls. No more fuel drips. Just a clean, secure seal every time.
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Frequently Asked Questions
Q: Will this fit my 495-4 fuel filter bowl?
A: Yes, it's specifically designed for the 495-4 and all 495/496/497 series hyaline bowls. The 3.35" inner diameter mates with the wrench flats on the bowl body.
Q: Can I use a regular oil filter wrench instead?
A: We strongly recommend against it. Strap wrenches and jaw-type filter wrenches apply uneven point pressure that can crack the hyaline bowl. The 491 wrench contacts only the designed flats and distributes force evenly.
Q: What drive size does it use?
A: It has a 1/2" square drive in the center, plus a 24mm hex head on the outside for use with a standard socket or wrench — gives you two ways to turn it depending on your clearance.
Q: How tight should I torque the bowl?
A: Hand-tighten until the bowl gasket seats, then add about 1/8-1/4 turn with the wrench. The bowl seals on the gasket, not on thread torque. Overtightening is the #1 cause of cracked 495/496 bowls.
Q: Does this work with the 496-5 filter element replacement?
A: Yes. When replacing the 496-5 filter element, you'll need to remove the bowl — this wrench makes that job quick and damage-free.
