The tools for converting to biofuel are very minimal. First you will need to make a decision on whether to use a straight vegetable oil (SVO) setup or a biodiesel setup. With either of these setups there will be some differences, but some similarities as well. No matter which option you go with you will need some type of biofuel conversion kit for you automobile.
This biodiesel kit will consist of a 50/50 fuel tank, filter with external heater, and possibly a transfer pump and filtration system. The straight vegetable oil system will differ just a bit. With this system you will get aluminum heated fuel cell, quick-flush switching system and 10-micron filter. Some companies will offer kits with some different accessories, but these are the basics.
You can, if you want, take your kit and car to your local garage and they can install the system for you (assuming they’ve ever done this kind of work before) or you could save a few dollars and install the system yourself.
I highly suggest speaking with someone from the manufacture of the bio fuel conversion kit. They will be able to help you and tell you every tool you might need to install their system. They might also be able to give you advice on working on your particular model car. Not every car is the same and some cars are harder to work on than others so it is always a good idea to ask questions in the beginning to save your self some headaches in the end.
Biofuel conversion kits will require basic hand tools as well. I suggest getting a nice set of screwdrivers, flat head and Phillips head. A solid ratchet with metric and standard measurements is a must when working on any type of automotive installation.
You will also want to get some sort of a tarp to lay down just in case you spill any liquids on the ground such as gas, oil, or any other fluid that could stain your driveway or garage floor. One of the most frustrating things about finishing a job is a stain that will not come up.
Plenty of lighting is something that most people forget about. If you cannot see what you are working on you increase your margin of error, and that is never good when working on anything, but especially when working on car.
I suggest getting some type of portable halogen lamp that can be mounted on a stand and taken off very quickly. Another thing that any amateur mechanic needs is a good jack and jack stands. Jack stands will allow you to raise you car in the air enough so you can work comfortably and safely underneath it. Make sure that the jack stands are made of sturdy metal and have some sort of lock on them to prevent the car from rolling back on top of you.
The last thing you will want to get is some safety glasses and mechanics gloves. You can never be too safe and they will both come in handy for all sorts of projects.
If you do not have these tools they can be easily purchased at any local auto parts store or you can pick them up online.