The 6 Best 6.5 Diesel Block Heater cords (2023 reviews)

Zerostart has been making great cord for years, thanks to a combination of clever design and high-end materials. These durable engine heaters are designed to provide warmth to areas with fluid susceptible to freezing or thickening. This will work with a Zerostart block heater. It has a single heavy duty cord with a male plug and silicone female connector. An optional thermostat may be added on, which measures the coolant temperature and regulates the engine block heater by cycling the heater on and off according to the temperature range setting of the thermostat, saving you money.

This one is on a 90deg bend and the factory one is straight. It fits the perfect cord long enough to extend to the front grill. It can be used in heavy duty truck applications, but you would need one for automotive.

Why We Like This:

Fits perfectly into oem block heater
Delivers what they promise

Best For Diesel Engine: MOPAR 6.5 Diesel Block Heater Cord

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The mopar 6.5 diesel block heater cord is suitable and reliable and fits well with your daily usage. It is compatible with a gas engine in a car. It fits very well, easy installation works great. It easily installs once you remove the air intake tub down to the turbo. The male power plug is inserted through the large hole,and the anchor pins are simply inserted in small holes keeping it in place. It fits as the oem should, helps the engine start quicker in the cold temps and provides better longevity for not much cost.

It comes with a heater element, not all come with the cord installed. It has the factory clips that make the end result very nice and clean. It is easy to hook up with no problems.

Why We Like This:

Easy install and keeps the block warm in the winter
Easy to install on the 2015 ram cummins
Factory fit, secures better than generic cables
Easy install if you remove the air cleaner housing and lower elbow

Best For cold weather: BMI element Cord

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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate cord. The bmi element cord is exactly that - it's a simple cord that hits all the right notes. There are 2 cord types that cover 90% of all block heater applications, this two pin type with the threaded collar or a peanut shaped one. The engine block heater itself uses 6.5 amps so a 16gauge extension cord up to 130feet will work just fine. It works great, direct fit to the existing block heater.

The cord has an orange plug and a metal ring that will screw onto the block heater. It's fits and fun exactly as it should. It is much easier to install if you remove the air box and part of the intake. This does a great job on cold mornings.

Why We Like This:

Fit perfectly, easy to install, waiting for winter to try it
Easy install less than 5 minutes
Fit perfectly and was able to just put it right on with no problems

Best Quality Product: BMI 6.5 Diesel Block Heater Cord

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It is great as replacement power cord for up to 1500w diesel block heaters. It fits right, works well, and works great as replacement for old and worn out cords. It works well and has a thicker cord than stock. It is easy to install to, crawl under your truck, and look for the oil filter. It's a good fit and it serves it's purpose well.

Why We Like This:

Very simple installation, plug and play
High quality rubber for long life and flexability in the cold
Great replacement for old and worn out cords

Best With Block Heater: Zerostart 6.5 Diesel Block Heater Cord

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If you want nothing but a cord that is suitable, this zerostart 6.5 diesel block heater cord is certainly a right investment. It works great on this engine/truck. It comes with zerostart so you can maximize your uptime with innovative heating solutions. It is made of a flexible rubber, and presses onto the block heater receptacle, and seals the contacts from salt/water from the outside. This cord fits all of the tractors with a three pronged end in the engine block. There is JUST enough cable to route to the grille/bumper on the front of the truck, with about 1'-1.5' of extra slack. It is flexible in very cold weather.

Why We Like This:

Include standard and weatherproof (wp) male plugs
Single cord with male plug and female silicone connector
Perfect fit for duramax lb7 diesel

Best With Ford: ZTUOAUMA 6.5 Diesel Block Heater Cord

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Not everyone likes to purchase cord for their daily purpose, but the ztuoauma 6.5 diesel block heater cord would be an anomoly. It is compatible with ford 7.3 6.0 6.4 6.7 l powerstroke diesel engines f350 250 f350 250 f350. It is covered with rubber material, the plug is made of stainless steel, providing better heating function and isolation for humanity. It is made of stainless steel, with great conductivity and with more exact dimension to fit oem engine block heaters, not east to fall down, better heating function.

Why We Like This:

New and hot release
One of the new comers and featured product