perkins AD4.203

MF165 · Jul 25, 2017

I am rebuilding a perkins ad4.203 engine.. Just got it tore down to block.. Now i need to clean it so i can Mike it .what is the best way to clean it..I have to blow out all the crevices,holes,etc... should know this but been awhile since i have worked on diesel engines.....thanks for any suggestions....I also want to paint the outside of block at some point...

Steve@Advance · Jul 25, 2017

I let the machine shop clean mine, block, heads, and accessories.

Strip it down to the bare block first, including removing freeze plugs, galley plugs, and cam bearings.

They bake the grease off now, I think.

Then when you get it back, pressure wash it to get the residue out of the water jacket and oil galleys.

That's the only way to get down to a paintable surface. Costs a little more, but sure worth not having to deal with the nasty!

MF165 · Jul 25, 2017

(quoted from post at 16:05:54 07/25/17) I let the machine shop clean mine, block, heads, and accessories.

Strip it down to the bare block first, including removing freeze plugs, galley plugs, and cam bearings.

They bake the grease off now, I think.

Then when you get it back, pressure wash it to get the residue out of the water jacket and oil galleys.

That's the only way to get down to a paintable surface. Costs a little more, but sure worth not having to deal with the nasty!

Thanks sounds like the way to go....appreciate it.

RBoots · Jul 25, 2017

I remove EVERYTHING from the block, clean
all the gasket surfaces, o ring grooves or
seating areas around the sleeves (if it's a
wet sleeve, which I'm pretty sure your Perk
is a dry anyway), remove oil plugs, cam
bearings, soft plugs, etc. Then I'll needle
scale the exterior of the block. I will
then pressure wash the dirtiest parts of
the block such as the coolant passages, and
any heavy grease. Then I'll wash the entire
block again, and finish by spraying through
all of the oil passages. Then I'll blow it
off and blow out all the passages, and rub
down the outside, and any machined part
where a bearing sets, etc, with a rag with
WD40 on it. Then when I go to assemble it,
I spray the whole thing down with brake
clean, then spray down through all the oil
passages with brake clean, and blow them
out again. Then it's time to assemble, and
once it's done, it's time for paint. A lot
of steps, I know. A lot of people get away
with less cleaning, and that's ok, but
that's just how I am, and how I'll keep
doing it.

Ross

perkins AD4.203

MF165

Member

Steve@Advance

Well-known Member

MF165

Member

RBoots

Well-known Member

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