Welcome to our Engine Heater Frequently Asked Questions page.
Here you’ll find expert answers to the questions we are most often asked about engine coolant heaters, thermosiphon heaters and engine preheating systems.
Whether you need advice on choosing the correct heater, installation or ongoing maintenance, our technical team is here to help.
CHOOSING THE RIGHT ENGINE HEATER
Engine preheating helps reduce wear caused by cold starts, improves starting reliability in low temperatures and allows the engine to reach its operating temperature more quickly. Keeping the engine warm also reduces unnecessary strain on components and helps ensure equipment is ready when it is needed.
Selecting the correct heater depends on several factors, including engine size, coolant capacity, operating environment and the lowest expected ambient temperature. Choosing the correct heat output is essential to achieve efficient engine warming without wasting energy. If you are unsure, our technical team can recommend the most suitable heater for your application.
Preheat Engineering manufactures a range of coolant heaters for generators, fire pumps, marine engines, construction equipment, industrial machinery and other diesel or petrol engines. The best model will depend on your engine type, installation layout and operating conditions.
Absolutely. If you provide details of your engine make, model, power rating and application, our experienced technical team will recommend the most suitable heater and any accessories required for installation.
ENGINE HEATER INSTALLATION
The correct inlet and outlet ports vary depending on the engine manufacturer and cooling system design. The aim is to create a natural flow of heated coolant through the engine block. If you are unsure which ports to use, we can help you identify the best installation points.
The hose diameter and fittings depend on the heater model and your engine’s cooling system. Using the correct hose size ensures proper coolant flow and efficient heat transfer. We can advise on the correct hose connections and supply suitable fittings where required.
Absolutely. If you provide details of your engine make, model, power rating and application, our experienced technical team will recommend the most suitable heater and any accessories required for installation.
Most installations require the heater, coolant hose, suitable fittings, hose clips, electrical supply and, in some cases, mounting brackets or a fitting kit. Preheat Engineering offers installation accessories to help simplify the fitting process.
After installation, the engine should be run to circulate the coolant and remove any trapped air from the cooling system. This ensures the heater is completely filled with coolant before it is energised, helping to protect the heating element and ensure efficient operation.
ENGINE HEATER OPERATION AND PERFORMANCE
You can purchase directly from Preheat Engineering.Orders are handled directly by our team.
To place an order or request further information, please contact us
0208 848 1912 sales@preheat.co.uk
Yes. Our heaters are trusted by customers worldwide to maintain fire pump engines in a ready-to-start condition. They are designed to provide dependable performance where reliability is critical.
Yes. Our coolant heaters are widely used on standby generators to ensure reliable starting and immediate load acceptance during power failures. Maintaining the engine at an optimum temperature helps improve reliability and reduces cold start wear.
Choosing the correct heater size, ensuring it is installed correctly and using thermostatically controlled operation all help minimise electricity consumption. Regular maintenance and checking coolant levels also help maintain efficient performance.
APPLICATIONS AND INDUSTRIES
Yes. Preheat Engineering designs and manufactures its products in the UK using quality materials and precision engineering. Our experienced team maintains high standards throughout the manufacturing process to deliver reliable heating solutions.
Yes. We supply a range of replacement parts and accessories for many of our products. If you have the heater model number, we can quickly identify the correct components.
PURCHASING, PARTS AND COMPANY INFORMATION
Yes. Preheat Engineering designs and manufactures its products in the UK using quality materials and precision engineering. Our experienced team maintains high standards throughout the manufacturing process to deliver reliable heating solutions.
Yes. We supply a range of replacement parts and accessories for many of our products. If you have the heater model number, we can quickly identify the correct components.
You can purchase directly from Preheat Engineering.Orders are handled directly by our team.
To place an order or request further information, please contact us
0208 848 1912 sales@preheat.co.uk
