SVO WVO Electric Glow Plug Fuel Heater Standard Installation Kit

Fits all 115, 116, 123, 126, 201 and 124 diesels between 1969 and 1995. This includes the 220D, 240D, 300D, 300CD, 300TD, 300SD, 300SDL, 350SDL, and 190D. This deluxe parts kit is a great solution to adding electric boost heat to any SVO WVO converted diesel Mercedes, VW, Ford, Chev, Dodge, etc. If you already drive a converted vehicle adding this type of heat can allow you to switch over to WVO much sooner after startup. The proper use of a 12 to 14 amp common Mercedes Benz glow plug (as shown here) is an extremely efficient means of quickly heating oil to over 120 degrees in less than a minute.

SVO WVO Electric Glow Plug Fuel Heater Standard Installation Kit
SVO fuel heater kit w instructions

Product Details

As long as the glow plug stays submersed in oil it can last for a very very long time. In some case it may create more heat than you want. To control the high end temp I have included an adjustable simple snap disk thermostat . This is connected to the low voltage lead to activate the relay. When the temp rises in the heating chamber the thermostat will snap off and shut power off to the glow plug. Then when temp goes down glow plug will come back on.

If installed properly this unit can be more effective than other well known thermal boost heaters on the market, cost less, and draws less current thus easing the strain on the alternator output. It can provide a super efficient means of boost heating the vegetable oil just before it enters the engines injection pump. It can quickly bring to oil up to over 120 degrees F. You will have to build your own heat chamber. Any good hardware store or chain home improvement store like Lowes or Home Depot wll have the fittings you need to build the heat chamber. If you need fuse holders, fuses, or wiring, these also can be purchased at a good hardware or auto parts store.

But there is a common problem with using glow plugs. Many are using the 8-inch pipe thread glow plugs from early Chevrolet diesel engines while others are using the larger thread Mercedes diesel engine glow plugs that are standard on most models from 1982-1993. The problem I have seem is people are trying to use these glow plugs with pipe fittings that are not designed specifically for them. This results in leaks and poor fit. Vegetable oil has a unique way of leaking out of any small crevice. It does indeed have an amazing wicking action. I decided the solution was to machine a proper fitting specifically for the readily available and inexpensive Mercedes pencil glow plugs.

When I set out to manufacture this brass fitting my goal was to machine a standard pipe thread fitting that would fit into all types of filters, pipes and fittings. This required drilling, tapping and machining the inside of this brass fitting so that the Mercedes glow plug would not only tighten down in the proper metric thread, but the end of the glow plug shoulder would also seat inside the fitting preventing leaks and providing a tight fit as well. What you see here is a result of those efforts. This brass fitting has a 1/2 inch NPT male thread which can go into any type of black iron or brass fitting using this size female NPT threads. You can use this fitting in a sump as pictured to provide boost heat directly before the injection pump or you can also install it in larger fittings that can help warm the fuel either before or after it enters your filtering system.

Choose your own design to deliver hot SVO to the engineChoose your own design to deliver hot SVO to the engine

I have packaged this deluxe WVO universal heater kit together that includes my custom machined brass fitting, a brand new pencil glow plug, and a new 30 amp power relay, an adjustable thermostat, and a 20 amp bayonet fuse holder. I will include an instruction sheet to show you how to wire the relay and thermostat and explain some application tips. NO other black iron metal fittings are included but you can purchase these at any hardware store. Be sure to check out the website for other innovative WVO SVO solutions.

QUESTIONS: Some have questions concerning the use of this type of heater. Below you will find answers to the two questions most commonly asked:

Q. How hot will this get the WVO?

A. I receive this question often, but it cannot be answered with a simple reply. There are many variables which will affect the maximum temperature reached. These include the temperature of the oil entering the heat chamber, the size and style of the heat chamber, the material the heat chamber is made out of, the flow rate of the oil through the heat chamber, and the position and setting of the thermostat used. If the glow plug and fitting are placed in a small T fitting without a thermostat the oil can go over 200 degrees F which is too hot. My tests have shown that if you get temperature of the oil to 150 to 160 degrees F just before it enters the injection pump then maximum temperature reached when injected will be close to 200 degrees F. The final temperature boost will be provided by the heat of they cylinder head and injectors themselves. Tips on chamber type, size and location will be included in my instructions.

Q. How adjustable is the thermostat control?

A. The thermostat can be adjusted from 90 degrees to 150 degrees F. That does not mean the temperature of the oil itself can only be adjusted within that range. Where and how you place the thermostat will play a huge roll in the actual temperatures of the vegetable oil. Placement and operational tips are included with my instructions.

Please note: glow plugs have proven to be an effective means of heating vegetable oil provided you do not allow the chamber to run dry of fuel; if you do the glow plug will burn out in a very short period of time. So a word to the wise if you are going to use glow plugs you have to be careful to not run out of fuel.

GreaseOn, Kent Bergsma