Compression Ignition Addict
Join Date: Aug 2009
Location: Nova Scotia
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Yes when you switch from WVO back to D2 diesel will flush out everything you have plumbed after your VO checkvalve. If you purge long enough. Should be no problem flushing the FPHE & it is a good idea to do this. You don't need to flush the VO filter but depending on how your system is plumbed & how much of it you wanna flush you may have to.
As far as a pump goes if you go with a Fass you might want to check & see if they warranty them for WVO. Thought I read somewhere they don't any more. If you decide to go with a stock pump I have no idea if they will last or not. One guy has run one for 70k miles with success but alot of other stock pumps have failed. Don't forget you are going to have get a FPR if you go with the stock pump. In order for the stock pump to have any chance of success you cannot be running cold VO through it. If you are going to flush it with D2 then that should help. My advice would be to locate it in the engine bay & flush it with D2. Don't forget that the more you flush the longer you have to purge & the more D2 you will use.
2001 f-350 ext.cab. 7.3 auto non dually. 262k miles. New HD tranny at 67,000 miles. Boost, EGT, Tranny temp gauges. 04/10 DIY check valve VO conversion. 20 plate FPHE,Fass HPFP set at 70 PSI,TIH, 10 micron spin on filter with coolant wrap, 150 micron prefilter, hrydraforce purge valve, 40 gallon greasecar tank with hotfox, SS braided hose to heads, Oil temp, pressure & fuel level gauges. 110K miles on grease.
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