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Plymouth Pb100 Radiators

Plymouth Pb100 Radiators

Starting at $140.95, AutoBuffy stocks 14 radiators from GPD, APDI, and UAC to fit the Plymouth Pb100. The radiator transfers engine heat into the airstream, keeping coolant temperature in a safe range. A failing radiator causes overheating that can warp cylinder heads or crack engine blocks — catching it early is far cheaper than an engine repair.

Signs your Plymouth Pb100 needs a new radiator

  • Temperature gauge climbs into the red or engine overheating warning light activates during normal driving
  • Visible coolant puddles (typically green, orange, or pink fluid) forming under the front of the vehicle after it sits
  • Coolant level drops repeatedly even after topping off, with no obvious external hose leak
  • Discolored or oily coolant in the reservoir — a sign of internal corrosion or a transmission-cooler line leak mixing fluids
  • Visible physical damage: bent fins, cracked plastic end tanks, or white mineral deposits along the seams
  • Heater output weakens noticeably because coolant flow through the core is restricted by scale or a partial blockage

Which radiator should you buy for your Plymouth Pb100?

The main decision is core material and row count — both affect how efficiently the radiator sheds heat and how long it lasts. Most owners choose between a direct-fit OE-replacement unit and a higher-capacity upgrade, depending on how the vehicle is used. Make sure any unit you select matches your Plymouth Pb100's transmission cooler configuration (automatic vs. manual) and engine cooling capacity.

OE-replacement aluminum/plastic
Best for
Daily drivers wanting a straightforward swap
What you get
Matches factory fit and cooling capacity; plastic end tanks keep cost down; easiest installation
All-aluminum (welded tanks)
Best for
High-mileage vehicles or those prone to end-tank cracking
What you get
Greater durability than plastic-tank units; fully repairable by welding; marginally better heat rejection
2-row performance aluminum
Best for
Towing, hauling, or modified engines producing extra heat
What you get
Higher coolant volume and greater fin density for improved heat transfer under sustained heavy load
Heavy-duty / upgraded OEM-style
Best for
Fleet vehicles, off-road use, or extreme climates
What you get
Reinforced mounting points, thicker core, and often an integrated transmission cooler for maximum reliability

Radiators brands we stock for your Plymouth Pb100

GPD
8 options · from $159.95
APDI
4 options · from $140.95
UAC
1 option · from $190.95
TYC
1 option · from $192.95

Replacing the radiator on a Plymouth Pb100

Moderate⏱ 1.5–3 hoursDrain pan and coolant catch containerSocket and ratchet setFlathead and Phillips screwdriversPliers or hose clamp pliersFlush kit or garden hose for system flush (recommended)

Drain the coolant completely, disconnect the upper and lower hoses and any transmission cooler lines, then unplug the fan wiring or remove a mechanical fan shroud before unbolting and lifting the old radiator out. Drop the new unit in, reconnect all lines and hoses with fresh clamps, and refill with the correct coolant mix — then run the engine with the heater on full to bleed air pockets and check for leaks. The job is manageable for an experienced DIYer but the tight engine bay on some Plymouth Pb100 configurations can add time; a repair manual or vehicle-specific guide is worthwhile before starting.

Frequently asked questions

How much does it cost to replace radiators on a Plymouth Pb100?
Parts start at $140.95 on AutoBuffy for the Plymouth Pb100. Add shop labor — typically one to three hours depending on accessibility — and the total repair can range from a few hundred dollars at an independent shop to significantly more at a dealership. DIY installation keeps the cost at the part price alone.
How long does a radiator last on a Plymouth Pb100?
Most radiators on the Plymouth Pb100 last anywhere from eight to fifteen years or more with proper coolant maintenance. Plastic end-tank units tend to develop cracks earlier than all-aluminum designs. Neglected coolant that turns acidic accelerates internal corrosion and shortens service life regardless of construction.
Can I drive my Plymouth Pb100 with a leaking radiator?
No. Even a small leak will cause coolant loss that leads to overheating within minutes of normal driving. Sustained overheating can warp the cylinder head, damage head gaskets, or seize the engine. If you notice a leak, stop driving the Plymouth Pb100 and address it before returning to the road.
Will any radiator fit my Plymouth Pb100, or does it need to be specific?
It must be application-specific. The radiator for a Plymouth Pb100 must match the correct core dimensions, inlet and outlet positions, mounting tab locations, and transmission cooler line fittings if equipped. AutoBuffy filters its 14 options by year, make, and model so only compatible units are shown for your Plymouth Pb100.
Should I replace the hoses and thermostat when I replace the radiator on my Plymouth Pb100?
Yes, it is strongly recommended. Since the cooling system is already drained and partially disassembled, replacing the upper and lower hoses, hose clamps, and thermostat at the same time costs little extra labor. These components age at a similar rate and a hose or thermostat failure shortly after a new radiator install means draining the system again.
What coolant type should I use after installing a new radiator in my Plymouth Pb100?
Use the coolant type and mix ratio specified in the Plymouth Pb100 owner's manual — formulations vary by make and mixing incompatible types causes gel deposits that restrict flow. As a general rule, a 50/50 mix of the correct coolant and distilled water provides both freeze protection and corrosion inhibition for most climates.

Shop radiators by year for the Plymouth Pb100

198019791978197719761975

More parts for your Plymouth Pb100

Radiator CapA/C Expansion ValveEngine Oil Cooler Mounting KitLeaf Spring BumperUniversal Joint Strap KitVoltage RegulatorDrum Brake Wheel CylinderAutomatic Transmission Oil Cooler

Radiators for other Plymouth models

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