The temperature of fuel going to the injectors makes NO difference on the temperature of the fuel leaving the injectors. That tells me that the injector has good thermal conductivity to the head and is a more than adequate heat source to warm the liquid passing through it. If the oil is too thick, not enough flows through the system and acceleration is limited. The fuel filter is very effective at removing particulates large enough to cause damage. WVO will NOT cause coking of the injector or burnt rings in my experience. I'm left blaming those reported problems on other underlying issues.
I wrapped both fuel lines with an outer hose circulated with coolant. Using a flat plate heat exchanger actually made no noticeable difference. Below 45F I thin with diesel or kerosene. I do filter the hell out of the oil, but that's just to make the standard fuel filter last longer. I'm running one of my 87SDL's on straight WVO with no mods to the car (not the blue one I got from you - Pete) - just to prove the point. Not enough miles on that one to make any determination. So far it's running fine - at least during the summer. I do have to admit that I got lazy and filled that one up with a few tanks of 100% diesel over the winter. -Dave Walton On Fri, May 1, 2009 at 7:09 PM, tyler <casi...@usermail.com> wrote: > WVO won't destroy a motor if it's done properly, but it almost never is. The > ad here claims they were able to just pour it into the tank. > > The injection systems on our MB Diesels are designed for fuel with a certain > viscosity, and cleanliness. WVO needs to be very well filtered, and heated > to a high temp before it can meet these specs... > > Most of the WVO systems out there (including expensive commercial ones) fail > to achieve a sufficiently low fuel viscosity and high enough fuel > temperature at the injector. A properly designed system requires massive > heating capacity (usually powerful electric heat AND large coolant heat > exchangers) to get the viscosity low enough. > > If you've been running with no problems for 70k, how are you filtering and > heating your oil? > > Personally if I were to convert a MB Diesel to WVO, I would > 1) determine the temperature at which my particular choice of used oil > achieves a viscosity of 6-10 cSt or less > 2) incorporate a temperature sensor into the system to guarantee that any > oil entering the engine has reached this temperature (ie automatically > switch back to diesel on low fuel temp) > > This temperature is probably more like 100C, while much lower temps are > usually used... > > Tyler > > dave walton wrote: >> >> Interesting how people with no direct experience on a subject are so >> willing to give advice. >> >> It's not surprising that people with no knowledge of how to maintain a >> diesel experience failures - regardless of the fuel they use. Starting >> out with a 20+ year old car that no one else wanted to buy does not >> help. >> >> I pulled the head on my S350 20K after running on 100% WVO. It looked >> fine inside. That was 50K ago. 70K+ and counting... >> >> -Dave Walton > > _______________________________________ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
