The #14 head on my 87 is on its last legs so I pulled the spare #17 head out of storage that I bought 5 years ago. When I went to remove the injectors it came with I noticed this goo all over the injectors, collar nut and even inside the prechambers. The injectors turned as if they were glued into the threads. Is this WVO residue or something else? I ask because I've never dealt with WVO. If it is WVO whats the most effective way of cleaning this crap?

The deck is flat so I was hoping to avoid pulling the prechamber but that seems unlikely at this point. I'm reusing my own injectors with relatively fresh nozzles in them.

Thanks in advance for any help, ideas or experience with this problem.

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CENSORED due to not family friendly words

For some reason your pictures are not showing up, but I am assuming it's a brownish / reddish like goo? If so, get a bottle of HEET or something similar which is pure or near pure methanol. Get a glass which you plan on throwing away. Glass or cup should be narrow to permit filling it up to the point near the barbed ends but NOT permitting that stuff to flow into the injector. Put something on top of the glass to avoid evaporation. Let sit each one for around 30 minutes. Wear gloves. It's a PITA and a time bandit, but methanol should eat through that stuff.

I disassembled and boiled one of the injectors in water with a dusting of arm and hammer super washing soda (aka sodium carbonate) per a mechanic neighbor's advice and the crap came right off. I guess I could do the whole head like that.

yep thats veggie oil,

you think this is bad, wait till you see one engine with this on the piston rings.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

I worked at McD's and BK back in my high school days. Saw enough polymerized vegetable oil and grease, to know that trying to burn it in an engine would be bad news...that stuff was the worst to clean out of the inside of the fryer. Like chipping away concrete.

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The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech

That's likely the reason this engine got parted out. I should take pics of the prechamber tips, it looks like burned hell with half the holes clogged up. Fortunately the owner managed to kill it before damaging the head which is the only part I'm really interested in.

Apparently sodium carbonate doesn't play nice with aluminum so I might have to leave cleaning to the professionals.

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CENSORED due to not family friendly words

When I posted this pic asking if people thought it was WVO they said yes.

The pic is of part of part of a filter that was filtering clean WVO. What is on the outside of the

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84 300D, 82 Volvo 244Gl Diesel

try a solvent, i have cleaned such grease with marvel mystery oil with time/elbow grease added into the mix. It will cut it down thats for sure. Other than that - you need to find a machine shop with a sonic tank to clean this head.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

These deposits are why I loathe veggie converted diesels - I have seen some folks destroy E320 CDI models by running veggie oil in it. It becomes absolute scrap metal after that.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)