23 Cooling system parts are listed for the 1991 Utilimaster Step Van, in 3 part types, covering both the 2.5L and the 3.3L. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 1991 Utilimaster Step Van, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. All 23 listed parts are Coolant / Antifreeze (18 parts), Thermostat / Thermostat Housing / Water Outlet Seal (3 parts) and Water Pump Gasket (2 parts).
The 1991 Utilimaster Step Van was sold with both the 2.5L and the 3.3L. 20 parts fit every engine; the other 3 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 1991 Utilimaster Step Van cooling system parts are PEAK (7 parts), PRESTONE (6 parts) and FEL-PRO (5 parts), plus 2 more brands. Quality grades include Standard Replacement, Economy and Premium.
4 parts on this 1991 Utilimaster Step Van page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including FVP MV5050GAL (Coolant / Antifreeze) and PRESTONE AF3100 (Coolant / Antifreeze). Click any part number to see every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: all 1991 Step Van engines | AF3055 | 🇺🇸 US | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Popular Fits: all 1991 Step Van engines | MV5050GAL | 🇺🇸 US | Extended LifeAll Makes / All Models | View on Amazon |
| PRESTONE Popular Fits: all 1991 Step Van engines | AF3100 | 🇺🇸 US | Prime Yellow - All VehiclesExtended Life | View on Amazon |
| PEAK Fits: all 1991 Step Van engines | BQA1GAL | 🇺🇸 US | Blue Mountain Long LifeAll Vehicle | View on Amazon |
| VALVOLINE Fits: all 1991 Step Van engines | 719009 | 🇺🇸 US | Multi-Vehicle Yellow1 Gallon | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular Fits: all 1991 Step Van engines | ZXG051 | 🇺🇸 US | G05 Yellow1 Gallon | View on Amazon |
| PRESTONE Fits: all 1991 Step Van engines | AFC12100 | 🇺🇸 US | Command Nitrite Free Extended Life CoolantYellow Nitrite Free OAT | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular Fits: all 1991 Step Van engines | AF2100 | 🇺🇸 US | All Vehicles10yr/300k mi | View on Amazon |
| PEAK Fits: all 1991 Step Van engines | PKP1GAL | 🇺🇸 US | All Vehicles Antifreeze1 Gallon | View on Amazon |
| PEAK Fits: all 1991 Step Van engines | PXA1GAL | 🇺🇸 US | 1 GallonGlobal Lifetime | View on Amazon |
| PRESTONE Fits: all 1991 Step Van engines | AFMAX | 🇺🇸 US | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Fits: all 1991 Step Van engines | GREEN5050GAL | 🇺🇸 US | Low Silicate Blend1 Gallon | View on Amazon |
| PEAK Fits: all 1991 Step Van engines | BMA1GAL | 🇺🇸 US | Blue Mountain Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: all 1991 Step Van engines | RUA1GAL | 🇺🇸 US | Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: all 1991 Step Van engines | FFA1GAL | 🇺🇸 US | Full Force Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: all 1991 Step Van engines | SEP1GAL | 🇺🇸 US | Sierra Conventional Green Concentrate Low Toxic Option1 Gallon | View on Amazon |
| PRESTONE Fits: all 1991 Step Van engines | AF3300 | 🇺🇸 US | Prime Conventional Green 1 Gallon | View on Amazon |
| VALVOLINE Fits: all 1991 Step Van engines | 859537 | 🇺🇸 US | G48 Blue1 Gallon | View on Amazon |
This table covers the engine coolants and antifreeze formulations specified for this cooling system. Typical signs include a rising temperature gauge, rusty or sludged coolant, or a heater that blows cold. Use the chemistry named in the notes. Mixing silicate, OAT and HOAT formulas can gel in the radiator.
18 Coolant / Antifreeze parts for the 1991 Utilimaster Step Van come from 4 brands — PEAK, PRESTONE, VALVOLINE and 1 other brand. The "Popular" part is FVP MV5050GAL. Every part fits both the 2.5L and the 3.3L.
In the Compatible With All Colors grade, PRESTONE supplies 1 part: grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. A representative part number is PRESTONE AF3055.
The Economy section lists 4 options from FVP, PRESTONE, PEAK and 1 other brand — the catalog's value-priced group. FVP MV5050GAL is listed in this group.
In the Heavy Duty grade, VALVOLINE and PRESTONE supply 2 parts: rated for severe service. A representative part number is VALVOLINE ZXG051.
In the Premium grade, PRESTONE and PEAK supply 4 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is PRESTONE AF2100.
In the Standard Replacement grade, PEAK, FVP, PRESTONE and 1 other brand supply 7 parts: built to original-equipment specification. A representative part number is FVP GREEN5050GAL.
Thermostat / Thermostat Housing / Water Outlet Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Fits: all 1991 Step Van engines | 35286 | 🇺🇸 US | Composite MaterialWater Outlet Seal | View on Amazon |
| FEL-PRO Fits: 2.5L | 35224 | 🇺🇸 US | Housing O-ring | View on Amazon |
| FEL-PRO Fits: all 1991 Step Van engines | 35286T | 🇺🇸 US | Permatorque | View on Amazon |
This table covers the seals at the thermostat housing and water outlet. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
3 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 1991 Utilimaster Step Van come from FEL-PRO. 2 parts fit every engine; the other 1 is engine-specific.
Listed part numbers: FEL-PRO 35286, FEL-PRO 35224 and FEL-PRO 35286T.
Water Pump Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Fits: 2.5L | 35444 | 🇺🇸 US | To Block | View on Amazon |
| FEL-PRO Fits: 3.3L | 35446 | 🇺🇸 US | To Block | View on Amazon |
This table covers the gaskets between the water pump and the block or housing. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
2 Water Pump Gasket parts for the 1991 Utilimaster Step Van come from FEL-PRO.
Part numbers include FEL-PRO 35444 and FEL-PRO 35446.
Buying Cooling System Parts for a 1991 Utilimaster Step Van
On this vehicle, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.
- Match the engine first. Some cooling system parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Coolant / Antifreeze and Thermostat / Thermostat Housing / Water Outlet Seal .
Frequently Asked Questions
How many cooling system parts fit the 1991 Utilimaster Step Van?
Our catalog currently lists 23 cooling system parts for the 1991 Utilimaster Step Van across 3 subcategories and 5 brands, covering both the 2.5L and the 3.3L. Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 1991 Utilimaster Step Van engines?
Some do. 20 parts fit every engine; the other 3 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of cooling system problems on a 1991 Utilimaster Step Van?
Common symptoms include a rising temperature gauge in traffic, sweet-smelling steam, crusty deposits around hose clamps, or a heater that blows cold. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 1991 Utilimaster Step Van was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 1991 Utilimaster Step Van?
First match the engine — each row shows which engine(s) the part fits. Then replace coolant with the exact specification the manufacturer calls for — mixing chemistries can gel and block small passages. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1991 Utilimaster Step Van
Cooling System Parts for Other Utilimaster Step Van Years
Switch vehicle or jump to a subcategory
Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.