My manifold is off the car and I was considering getting it cleaned.
I read somewhere that someone did it and they thought it was a mistake. Not sure why and I can't find that thread now.
People seem to think it doesn't make a difference anyway.
Sure is a lot of crud in there, though.

Opinions?

Thanks,
Jeff

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1984 300SD 300,000 miles--two tank WVO setup
2.88 diff & 500SEL anti-squat rear end

It can't hurt to clean it.

Sixto
87 300D

if you do clean it I'd block off the egr so it stays nice and clean.

You can always burn out the gunk with a propane torch and some diesel

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

Don't put it into a caustic cleaner- you'll end up with less manifold than you started with.

There is no "hot tank" for aluminum.

The only way to clean the inside is the slow and painful way of using brushes and solvent. Mineral spirits or similar will assist the job with sufficient time. They will dissolve the deposits slowly, but a brush is required to finish the job.

A brush with a wire handle that can be bent is preferred to access the interior via the EGR passage.

Brian,
Thanks for the input.
I was just re-reading a post of yours talking about "jet-hot"
and that was what I was thinking of--not "hot tank"
Others have suggested carb cleaner as the solvent..
Looks like some elbow grease time.

Jeff

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1984 300SD 300,000 miles--two tank WVO setup
2.88 diff & 500SEL anti-squat rear end

You're referring to these guys:

Jet-Hot Ceramic Coatings

Fancy website. Poor product.

The exhaust manifold heated and flaked the coating off within about three years. Now the SD has a silver and rust manifold instead of just a plain rust manifold.

I'm quite sure they won't clean the inside of the intake for you..............

Soak it in a bucket of aluminum-safe solvent (make sure it doesn't contain lye, aka sodium hydroxide, aka NaOH) before you get to scrubbing it will save you a ton of time

__________________
$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

not quite so...

the aluminum "carburetor DIP" sold in the gallon paint cans, works GREAT to remove and PRISTINE clean the intakes... however, the intake will not fit in the can... you'd need 3 cans, and a deep bucket to dip the manifold in...
on the 603 crossover tube, I can dip one end, then the other, and have a perfectly clean tube... the 617 intake is just a tad longer...
I have a 15Gallon steel drum I use for sorting stuff, it's deep enough for the manifold, but that would be over 150.00 in cleaner... I don't know.
I suppose you could set the manifold up so all the ports are up, and seal the turbo inlet, and fill the manifold with the dip, but that stuff is REALLY bad news if it spills... not for the faint of heart...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

I used biodiesel and various brushes to remove the bulk of the crud, then followed up with a bucket of hot soapy water, rinsing in more hot water. X2 on blocking the EGR valve. This is a job that you won't want to repeat.

__________________

"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

Brake cleaner works well.

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1999 Mercedes E300TD daily driver sold at 238K miles 106K miles were mine, rust worm got it :-(
2006 Mercedes CDI new daily driver! 56,000 miles May 2016 now 85,625 Apr 2018 and Apr 2019 101,000 miles Apr 2020 109,875. March 2024 135,250

What is it in the bio that makes it a good cleaner?
I have both methanol & KOH sitting around.

Jeff

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1984 300SD 300,000 miles--two tank WVO setup
2.88 diff & 500SEL anti-squat rear end

Rooster, did you get the manifold cleaned out?

I tried using a steam cleaner to blast it out one time. better have your rain gear on and a face shield. that black crap goes every where.

Here is a thread from a while back on this subject.

http://www.peachparts.com/shopforum/diesel-discussion/196431-intake-cleaner.html

Post #10 is links to a guy burning it out on his VW TDI.

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works