VAM Gremlin Radiator Coolant Hose Guide: 1973-1978 Models
Keep your VAM Gremlin's classic inline-6 engine from overheating by choosing the right radiator hoses.
- Only use new aftermarket hoses; old 'New Old Stock' (NOS) rubber is unreliable and can fail suddenly.
- Ensure you purchase molded hoses specifically for the AMC inline-6 engine, as V8 hoses will not fit your VAM Gremlin.
- Gates is a highly recommended brand known for quality and proper fitment on classic American vehicles.
- Always replace the hose clamps at the same time as the hoses to ensure a leak-proof seal.
Signs of a Failing Radiator Hose
The rubber on a 50-year-old car has been through a lot. Heat, pressure, and time all work to break down your Gremlin's radiator hoses. A bad hose is a breakdown waiting to happen. If you see any of these signs, it's time for a replacement.
- Coolant Leaks: Puddles of green, yellow, or orange fluid under the front of your car are a clear sign of a leak. You might also notice a sweet smell after driving.
- Visible Damage: Look at the hoses. If you see cracks, splits, or bulges, they need to be replaced immediately. Also, feel the hoses (when the engine is cold). If they feel mushy, soft, or spongy, the rubber is weak. Oil leaking onto a hose can also cause it to swell and degrade.
- Engine Overheating: If your temperature gauge is in the red, a leaking or collapsed hose could be the reason. A collapsed lower hose can starve the engine of coolant when it's needed most.
- Low Coolant: If you have to add coolant to the reservoir often, you have a leak somewhere. Hoses are the most common suspects.
A Note on VAM vs. AMC Gremlins
VAM Gremlins sold in Mexico between 1973-1978 were equipped with AMC's reliable inline-6 (I6) engines, either the 232ci (3.8L) or the 258ci (4.2L). They were not sold with the V8 engine option available in the US. When buying hoses, make sure they are specified for the 6-cylinder engine. V8 hoses will not fit correctly.
Choosing the Right Aftermarket Hose
For a classic car like the VAM Gremlin, new aftermarket parts are your best and safest option. You might find "New Old Stock" (NOS) original AMC hoses, but you should not use them. Rubber becomes brittle and weak over decades, even sitting on a shelf, making an NOS hose unreliable and prone to sudden failure. A freshly made aftermarket hose is much more durable.
Brand Quality: Gates
Gates is a well-respected brand that is often recommended by classic car owners. They are known for making high-quality parts that fit correctly. Many forum users prefer Gates over other brands, noting their durability and good fit, which is crucial in a tight engine bay. Gates hoses are made with modern materials designed to resist collapse and chemical breakdown, making them a reliable choice for your Gremlin.
Always choose a molded hose. Molded hoses are pre-shaped to fit your Gremlin's specific engine layout perfectly, bending around other parts without kinking or rubbing. Do not use a universal or flexible hose, as it can kink and restrict coolant flow, leading to overheating.
Estimated Replacement Costs
Replacing radiator hoses is a common maintenance job. Below are typical costs you can expect. Prices can vary based on your location and specific mechanic.
| Part or Service | Estimated Cost |
|---|---|
| New Aftermarket Hoses (Upper & Lower) | $22.57 - $50.84 |
| Shop Labor | $100 - $200 |
| Total Professional Replacement | $125 - $250 |
Frequently Asked Questions (FAQ)
Should I replace my hose clamps too?
Yes, absolutely. Old clamps can weaken and lose their tension, causing leaks even with a new hose. Replacing them is cheap insurance to make sure you have a tight, leak-free seal.
My old lower hose had a spring inside. Does the new one need it?
Probably not. The spring in the original hose was mainly to prevent it from collapsing during factory assembly. Modern aftermarket hoses from brands like Gates are made from stronger, reinforced rubber that resists collapsing under suction from the water pump. Most new hoses do not include or require the spring.
Are there any recalls for VAM Gremlin radiator hoses?
No. Searches of the National Highway Traffic Safety Administration (NHTSA) database show no recalls or safety campaigns for radiator hoses on the 1973-1978 AMC or VAM Gremlin.
How often should I replace my Gremlin's radiator hoses?
For a classic car, it's a good idea to inspect the hoses every year. As a preventative measure, you should plan on replacing them every 4 to 5 years, even if they look okay. This helps prevent a sudden failure that could leave you stranded.
What if I have an aftermarket aluminum radiator?
Many owners upgrade to modern aluminum radiators. Be aware that the inlet and outlet positions on these can sometimes be slightly different from the original. You may need to carefully trim a small amount off the end of your new hose for a perfect fit without stress or kinks.
Technical Specifications
OEM Part Numbers: 3178641 3193851 3193852 3217432 3231320 3238753 8933001074
Hoses must be molded and specific to the AMC 232ci (3.8L) or 258ci (4.2L) inline-6 engine. Modern EPDM rubber construction is standard for aftermarket replacements.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.