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This Post is from another member, I copied it for you
This is how i performed the bb mod on my truck. This mod is to boost fuel pressure up from 55 to about 75. First i removed thermostat housing by removing using a 10 mm. I then pushed the thermostat housing to the front to give me room to remove fuel pressure regulator. Then remove the line on the fpr. The bolts on the fpr are a t27 torx. Remove all four bolts holding it to the upper fuel filter. Watch out because the spring has it under pressure. Make sure the spring and brass poppet valve doesnt fall out. Take a .177 bb and slide it in the brass poppet and reassemble everything. You will lose some coolant doing this mod so make sure you have some on hand. Some companies sell a longer spring but the bb is cheaper
You really should install a 6 mm BB - it is a little larger. Also, I did not move the thermostat housing. I did remove the air filter and the hard plastic CAC tube though. It was tight, but it is manageable.
You really should install a 6 mm BB - it is a little larger. Also, I did not move the thermostat housing. I did remove the air filter and the hard plastic CAC tube though. It was tight, but it is manageable.
Make sure you are getting two qts. of the VC-9. That is the amount required and drive the truck for at least 20 to 30 miles with the t-stat in. It needs the heat to work properly. You are then free to remove the t-stat for the rest of the flushing.