Not true, it's amazing how this crap starts with no basis in fact then spreads all over the forums like wildfire. Looking in my log, my last set of glowplugs had 11 years and 84,200 miles on them and were still working fine when I changed them. And I've never touched my relay or controller since I bought the truck new in '91. In the 249,000 miles on it I've gone through 2 or 3 sets of glowplugs.I have read that only replacing the GP without a new relay will shorten GP life.
Ok, good to know you agree with LMJD on glow plugs not shortening their life if I choose not to do the relay/controller right now. What do know of the quality/longevity of the Diesel Rx GPR/Controller? BTW, as mention I am a 7.3 guy too, just not a mechanic and havent wrenched on them recently as I getting ready to do now.I am a 7.3 guy so take my advice with a grain of salt. I have not heard of a relay affecting glow plug life. I would suspect that as a relay starts to fail people blame the glow plugs because the relay is kind of working but not really moving the current as needed. If you plan on a new relay anyway it is nice to have it in while you are doing the rest of the work. I would not buy backup glow plugs until needed.
I started this topic because my 94 E350 has 320,000 on it and I;m trying to revive it to get hopefully a little more miles out of the engine hopefully a lot more but, doing all this to make sure I do all i can with the little money I do have so I wont have to take things back apart a second or third time while I have them apart now. Trying to get all the help and advice I can as I have medical troubles and vans or already a PITA to wrench on. Was also considering a new water pump while I have the radiator coming out and was trying to figure out if a fan and fan clutch delete/ hayden dual e-fan was smarter then replacing the old worn out fan clutch that is now on it. To many things on it getting old so am trying to extend its life a little longer hopefully. All help, thoughts, advice is really, sincerely appreciated. THANKS to you all for posting itNot true, it's amazing how this crap starts with no basis in fact then spreads all over the forums like wildfire. Looking in my log, my last set of glowplugs had 11 years and 84,200 miles on them and were still working fine when I changed them. And I've never touched my relay or controller since I bought the truck new in '91. In the 249,000 miles on it I've gone through 2 or 3 sets of glowplugs.
Good advice. I did as you suggested and drained the pan and let sit. No antifreeze. Clear water only. I did a cold flush with fresh diesel fuel after I let the engine completely drain of oil/rainwater. I put 1 gallon of diesel, in oil filler neck and let gravity do the rest. After 2-3hours I pulled the oil drain plug and drained off remaining fuel, sludge, and a 1/8 cup more clear water. I then repeated the diesel fuel cold flush above but this time I let the gallon of diesel fuel sit overnight as a cold engine "diesel flush" to see if I could clean out any more soot/sludge/residual water. Upon draining, I found all water in pan is gone and most all the remaining oil, drained out with the diesel. Then I did a final flush where I put 1 gallon of fresh 15w40 oil thru the engine and let it gravity feed to the oil pan and drained after letting theAfter any engine sits overnight or longer, if there's coolant/water in the oil it will totally and completely separate from the oil and be at the bottom of the pan. Where it came from would be the question. It's true, on pickups rainwater can leak past the hood seal then on to the air cleaner lid past the wing nut rubber washer and into the engine. You ought to be able to determine if the van hood is designed so the same thing applies. If you've still got the drained oil in buckets, let it set, drain off the oil and determine if it's pure water or antifreeze in the bottom of the bucket. If it's antifreeze that would mean head gasket or whatever.
O.P. and others-THE SUSPENSE IS KILLING ME HERE-please come back and let us know how this is turning out-