Big Blue24
Comp Diesel Sponsor
- Joined
- Jan 5, 2008
- Messages
- 6,320
Step 1: Remove the overflow valve.
Step 2: Use 3/4" wrench to hold the valve and remove the smaller 12mm nut to disassemble.
Factory shims used to adjust pressure when valve is initially built.
Step 3: Take ordinary pen and remove the internal spring. Notice that the winding of a pen spring is opposite of the winding of the stock OFV spring, this will prevent the two springs from becoming tangled up inside the OFV.
Step 4: Stretch the OFV spring just a little bit, try to make it about 1/8" longer. Then install the pen spring inside the slightly stretched OFV spring. Then trim the pen spring so when it's installed, it's even with the slightly stretched OFV spring. If the pen spring is left too long where it sticks out past the OFV spring pressure will be high 55 psi or so, if the spring is trimmed even with the slightly stretched OFV spring, pressure will be perfect at about 40-45 psi, if pen spring is cut a little short, pressure will be around 30-35 psi which is still a lot better than stock but a little low for a high performance setup.
Step 5: Reassemble the valve and reinstall it on the injection pump.
Step 2: Use 3/4" wrench to hold the valve and remove the smaller 12mm nut to disassemble.
Factory shims used to adjust pressure when valve is initially built.
Step 3: Take ordinary pen and remove the internal spring. Notice that the winding of a pen spring is opposite of the winding of the stock OFV spring, this will prevent the two springs from becoming tangled up inside the OFV.
Step 4: Stretch the OFV spring just a little bit, try to make it about 1/8" longer. Then install the pen spring inside the slightly stretched OFV spring. Then trim the pen spring so when it's installed, it's even with the slightly stretched OFV spring. If the pen spring is left too long where it sticks out past the OFV spring pressure will be high 55 psi or so, if the spring is trimmed even with the slightly stretched OFV spring, pressure will be perfect at about 40-45 psi, if pen spring is cut a little short, pressure will be around 30-35 psi which is still a lot better than stock but a little low for a high performance setup.
Step 5: Reassemble the valve and reinstall it on the injection pump.