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  #1  
Old 01-12-2010, 11:28 PM
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Veg Oil problems?

I've heard around about Veg oil giving people problems. I'm curious to know if anyone else has had Veg oil problems.

I have a car in my shop right now a 124 with a 606 which was on Veg oil. Now the car runs like crap when cold, misfiring and whatnot, low compression. This car is a total mystery, but I'm starting to think its something with the Veg oil. Just wondering if anyone else has had problems.

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  #2  
Old 01-12-2010, 11:31 PM
79Mercy's Avatar
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hahahah, do a search. But don't worry 150 other people will post here.

WVO kills.
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  #3  
Old 01-13-2010, 12:09 AM
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HAHAHAHA !!!!!!!
probably seized rings, blocked pre-chambers, damaged IP & injectors. Depends on the WVO and how much and how long you used it.

Plenty of Veggies on here will tell you its old age & nothing to do with the fuel.

There is a thread on here at the moment with people giving details on how many miles they have used WVO for.

Who ever owns the car is a sucker. They either used WVO without properly understanding the consequences, or purchased the car being told how good it was on WVO. Its like placing a grenade without a pin between your legs so you can count to 10 on your fingers.

The easy cure is to take the head & sump off, remove pistons & clean the varnish off every thing. Replace injector tips & replace what ever is crook in the motor. Give the owner a BIG BILL & suggest they use proper fuel in the future.
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1984 300D 500k miles
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  #4  
Old 01-13-2010, 12:10 AM
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Improperly filtered oil, and a poorly designed VO system will gum up the whole fuel system, cause carbon deposits, and gum up piston rings. All of these things cause poor running, low compression, excessive wear, and veg oil in the motor oil which can become polymerized and cause excessive wear on all the things that require oil lubrication. I'm guessing the system is either a single tank setup or a two tank system with a lack of proper heat. Tell us more about the veg system. There are some tricks to cleaning up the system and unsticking piston rings, but it may not help depending on the state of things.

You could simply need some diesel purge to clean out the injectors and fuel system, a valve adjustment, and some new glow plugs.
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  #5  
Old 01-13-2010, 12:24 AM
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I don't think you have to adjust the valves on a 606.
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  #6  
Old 01-13-2010, 12:33 AM
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Quote:
Originally Posted by Skippy View Post
I don't think you have to adjust the valves on a 606.
True dat, I just forgot, I never deal with the 606's so it slips my mind.
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  #7  
Old 01-13-2010, 02:02 AM
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"death in a cubie"
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  #8  
Old 01-13-2010, 02:24 AM
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Quote:
Originally Posted by Eric View Post
"death in a cubie"
Wow you are so helpful. It's not his car. He is trying to fix it.
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  #9  
Old 01-13-2010, 04:46 AM
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Quote:
Originally Posted by Biodiesel300TD View Post
He is trying to fix it.
may Odin give him a large budget to work with!
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  #10  
Old 01-13-2010, 05:24 AM
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Follow the link on post #125, it help few with gummed ring
reamed glow plugs, now won't start in warm weather!
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  #11  
Old 01-13-2010, 08:18 AM
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Regardless if the issues are caused by the veg oil or something else, please report back with what ever the definitive cause is found to be. If it does indeed turn out to be due to the veg oil, please tell us how you were processing and using it/
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  #12  
Old 01-13-2010, 09:14 AM
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The only problem I had with old veggie was animal proteins.That is the grease from fried meat.
Cold filtering sloved this problem. Also rushing to filter(if out of diesel money) caused problem with water.A Stanadyne FM 100 5 micron water seperator helps.But you need to wait a week to settle water out.
New oil never no problem as long as injectors are 175 degrees,and I never run 100% oil.I always mix 30% diesel in.
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  #13  
Old 01-13-2010, 02:06 PM
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rings are what I'm thinking, I'm just curious to hear some horror stories about Veg conversions. We didn't install the kit, apparently this guy filters his own oil.
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  #14  
Old 01-13-2010, 02:36 PM
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The most detrimental problem with running VO is the rings getting stuck, and allowing VO to get into the motor oil. A little fuel in the oil is okay and fairly normal in an old diesel. But with VO there is a threshold and if you go over that line the motor oil instantly polymerizes. It turns into this black gooey gelatan. Say good bye to your engine. I've seen some that came out of a 2000 era Ford that was running VO. The reason the rings get stuck is because the VO isn't hot enough when it's injected. This causes poor spray pattern and uncomplete burning of the fuel so you end up with VO deposits, which gum up the rings. You can also avoid having too much VO in your oil by changing oil frequently. There are two main causes to engine problems with VO, lack of heat, and lack of proper filtration. If you use good quality VO, filter it properly, and heat it enough all will be fine for a long time.

I'd suggest pouring in an ounce or two of brake fluid into each clylinder. Brake fluid will brake the rings free, if that is the issue. I've done it on several engines that have sat for a long time and caused the ring to get stuck in place. I had a 300D engine that had 80psi in one hole. Poured in some brake fluid, and let it sit for several days, and compression came up to over 300psi. Make sure to change the oil afterwards. You don't want brake fluid in your oil.
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  #15  
Old 01-13-2010, 02:45 PM
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You'll want to pop test the inj's too....they undoubtedly have a bad spray pattern and are contributing to the problem.

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