Cleaning exhaust manifold of carbon buildup

[tiang]

What should i use? Petrol, turps, screwdriver, fingers?

[The Last Streetfighter]

Take it to a paint shop and let them whip blast it.

[Cruiser97_80]

Oxy torch FTW

[Sam_Q]

I would think a sand blaster would be pretty good, but I have to ask why would you care?

[tiang]

the 2 middle cylinders are gone, and all the gunk has gone into the header piping. I've scrapped away most of the gunk, but it'ld be nice to get rid of it all.

[Sam_Q]

what about just a high pressure wash nozzle in there? would it stand a chance?

[thechuckster]

bunnings sell cheap high-pressure water sprayers.

remove part from engine, spray away, clean up black watery stains left all over garage....

[Vios-GT_07]

^^

why not take the exhaust manifold off, and bring it to the car-wash, for 2 bucks you get 5 minutes or something?

[thechuckster]

... cause you can write your name in the dirt-encrusted floor of the garage/carport/... area with the fine nozzle on the sprayer?

[ReQuieM]

^^

why not take the exhaust manifold off, and bring it to the car-wash, for 2 bucks you get 5 minutes or something?

FTMFW!!

[oldcorollas]

try spraying WD40/RP7 or whatever in there and let soak for a day or two... and then try to scrape off?

alternatively, if you put it in an oven at around 800C, in air or oxygen rich, it will decarburise

[Aust162]

Easy off oven cleaner.($3-4.00 can), let it soak for an hour then hit it with the high pressure wash.

[oldeskewltoy]

Tried a machine shop???? They are always tanking parts to clean then...... just a brainfart

[Kyosho]

I use between 150 - 180PSi of air (From a large compressor)

Works wonders, just becareful, shit flys everywhere, and don't hit your skin. Air bubbles under the skin can kill.

[EldarO]

acid dip ftw?

Elmo.