Topic: Does anyone know how to get this off of engine parts?

[KV41]

I recently opened up an engine that looks like it has been sitting forever. I've tried alot of things to get off this coating of (what I think is dried/burnt oil). I'm not sure what the previous owner had put in there or had done to but it is on everything inside of the engine. Any tips to getting this off?

Thanks,

KV

[Don R]

 There was a Hondaline oil that contained large amounts of graphite. I have an engine like that, I always thought it was carbon from a plugged exhaust (which it had) Hondaman mentioned that he used to see that.
 I'd try scotchbrite and solvent.

[BenelliSEI]

Vapour blast.

[Tracksnblades1]

Karcher hot water high pressure washer….clamp it down…😁

Tyme Carburetor cleaner…submerge for 1/2 hour or more, rinse off with water…😁

[HondaMan]

Yeah, like Don R said: it had Hondaline oil in it at some point, or so it appears.
It turned the inside of my own K2 jet-black in 3 oil changes! I tore the whole thing down and had the parts washed by the local machine shop in their parts washer: that did it.

[MRieck]

Vapour blast.

Or just bead blast

[scottly]

Vapour blast.

Or just bead blast

I wouldn't bother with either method, just to make internal parts look prettier.

[KV41]

@hondaman is it ok to run as is? It’s not going to hurt anything? I vapor blasted the cases, head and cylinder so those are clean of the Honda line residue. Only some of the  components like the transmission, clutch and now have it

[RAFster122s]

Castrol Super Clean is highly alkaline cleaner and parts soaked in it if clear coated by Honda it breaks it down and strips that clear coat, so I would bet this would also be stripped. Definitely wear gloves and work outside with this stuff. It gives me an instant raging migraine if I catch too much of a breath of it.

Rinse well and brush/scrub the parts with a nylon detail brush to ensure the residue is gone.

David

[Don R]

 Super clean will etch aluminum if left on, (as David said) it also took the brushed aluminum finish totally off my GMC plumber trucks dash. Oops.

[Don R]

  I doubt that it will hurt anything, it's a graphite lubricant which Honda apparently used an abundance of in the earlier oil.
  I almost junked an 811 engine because it was so black inside, I thought it was carbon from the plugged exhaust it had when I got it. A percentage of it may have been carbon, I don't know.  It's been under the bench for years and when Mark mentioned that oil, the little light bulb over my head lit up.