Glow plug pics 10,000 miles on wmo

Alwaysreadyrob

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More pics of the 94 IDI

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Sidewinded_idi

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Ok, i get it... been running oil for 6 yrs now with no issues , i filter my oil through 2 micron filter cloths , then it gets pumped through a Redline Veggie pump with a spin on 1551 napa filter, then pumped into the fuel tank in the truck which also has i napa gold racor filter and 2 stock fuel filters and lastly a small inline glass window filter before it hits the IP. One picture is veggie oil in the line and the other is diesel.

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With the veggie oil did you do any fuel system modifications? I run the wmo just out of not having to heat it or specially treat it once onboard but I’m not the most informed on veggie
 

Hydro-idi

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Running 100% veggie oil will almost require an in line fuel heater. I would say this is the best form of alternative fuel as well.
Running anything other than diesel fuel should always be centrifuged.
I ran WATF for years when I was a broke college student. Had a pretty good filtration system (but no centrifuge) and enjoyed not paying for fuel.....until it eventually bit me in the ass. Running WATF eventually coked my precups solid shut with rock hard carbon, blew out injectors & eventually ruined the IP. Not to mention cracked cylinder heads & precups because it runs so much hotter than diesel fuel.
It’ll save you gobs of money not paying for diesel....but don’t be surprised at what you see if you ever have to open up an engine that has been run on WMO/WATF. It’ll almost always ruin the cylinder heads. This is coming from both myself & Mel
 

Alwaysreadyrob

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With the veggie oil did you do any fuel system modifications? I run the wmo just out of not having to heat it or specially treat it once onboard but I’m not the most informed on veggie

An auxiliary tank, electric fuel pump wired to the 3 way fuel port and a Vegitherm inline heated fuel line.
 

Alwaysreadyrob

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I really think wvo is good for the engine if filtered properly... my truck seems to get a power surge when the oil hits the engine, it has more lubricity so the engine quiets down a bit as well.
 

Sidewinded_idi

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Running 100% veggie oil will almost require an in line fuel heater. I would say this is the best form of alternative fuel as well.
Running anything other than diesel fuel should always be centrifuged.
I ran WATF for years when I was a broke college student. Had a pretty good filtration system (but no centrifuge) and enjoyed not paying for fuel.....until it eventually bit me in the ass. Running WATF eventually coked my precups solid shut with rock hard carbon, blew out injectors & eventually ruined the IP. Not to mention cracked cylinder heads & precups because it runs so much hotter than diesel fuel.
It’ll save you gobs of money not paying for diesel....but don’t be surprised at what you see if you ever have to open up an engine that has been run on WMO/WATF. It’ll almost always ruin the cylinder heads. This is coming from both myself & Mel


Sounds like you definately weren’t filtering it well enough. I centrifuge and have had zero coming or carbon issues. Truck loves it but you need to do your due diligence on making it ready to run
 

Hydro-idi

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I had a triple filter setup. I think it was something like 5 micron or something like that. Hard to remember it was a while ago. Centrifuging is the way to go, but doesn’t change the fact that WMO runs really hot. WMO typically has a 10-30% increase in btu’s compared to #2 diesel.
 

Alwaysreadyrob

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I had a triple filter setup. I think it was something like 5 micron or something like that. Hard to remember it was a while ago. Centrifuging is the way to go, but doesn’t change the fact that WMO runs really hot. WMO typically has a 10-30% increase in btu’s compared to #2 diesel.

Yes, but i run WVO ... straight
 

Cubey

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Those are Autolites? I would be happier about the fact that they didn't swell more than the amount of carbon on them. I am guessing you replaced them with Beru's or something "non-Autolite".

The Autolites I pulled from mine in favor of MCs were heavily carboned (had to use an allen wrench to clean the holes before the new ones would go in!) but the plugs themselves don't look too bad.

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Macrobb

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I had a triple filter setup. I think it was something like 5 micron or something like that. Hard to remember it was a while ago. Centrifuging is the way to go, but doesn’t change the fact that WMO runs really hot. WMO typically has a 10-30% increase in btu’s compared to #2 diesel.
Sounds to me like that's an EGT problem then... More BTUs = More power output

I mean, either you end up running less WMO for the same power out, or you would be adding more diesel instead... One or the other.
The IP will reduce the amount of fuel going in to exactly what the minimum is needed for the load you are running, to maintain RPM. If it did anything else, your engine would die or the RPMs would skyrocket.

The only other factor here is timing - perhaps you need a different timing number for WMO or WVO?

Especially considering as EGTs, cylinder temps, fuel and timing are directly linked - any timing adjustment that gets you more power should also lower EGTs(under normal loading conditions), as well as reduce fuel used.

I have no doubt that you ended up with a cracked set of heads(I'd like to see pics, though - where were the cracks?), but I'm thinking there's ways around this problem.
 

Hydro-idi

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Should have taken pics. Both heads (first set) were riddled with cracks.
My second set of heads was even worse when I had baby moose on n/a engine (running regular diesel fuel). I cooked that engine in about 200 miles lol. Cracks were in between valves, all around valve seats, and past fire ring. All precups were junk this time round.
All I can say was....it was fun while it lasted.
 

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