Cleaning the intake manifold - but how?

HI

The articles about the AGR (Abgasrückführung) valve often mention that the intake manifold is very dirty and that cleaning it would be worthwhile.

But how??

Did you remove that part?

m;

I would definitely do that for safety reasons... because if loose dirt gets into the engine...
I think the best thing to do is to remove the entire part, take a large bucket, and let it soak in diesel overnight. Of course, you should then dispose of the diesel properly. After a thorough cleaning, it feels like a lot of preliminary work is done, and then it's just a matter of brushing and wiping... and dealing with dirty hands.
Maybe brake cleaner will work too; it's kind of a universal solution.

Too bad about the diesel *g*.
I siphoned some gasoline from the lawnmower and then burned it. At first, I wanted to just 'scrape it off,' but if I did that, I'd still be working on it today...

DocSnydor wrote:

Too bad about the diesel *g*. I siphoned some gasoline from the lawnmower and then burned it. At first, I wanted to just "scrape" it off, but if I did that, I would still be working on it today...

Hmm, that could backfire. I've always cleaned moped exhaust systems by using a rust converter spray gun and a mixture of gasoline and diesel.
It produces a flame that is approximately 2 meters long with a diameter of 30-50 cm. This causes the burning (and burning) to happen very quickly.
Of course, only do it outdoors, and be careful not to burn yourself .
I would be concerned that an intake manifold made of cast aluminum might warp due to the heat.

RME (biodiesel) is also said to be a good solvent. However, I haven't yet tried it to see if it helps with oil shale. Because eventually, the engine displacement and full-throttle operation of my 2-stroke engines has become so large that combustion occurs automatically during operation.

Best regards, Rainer.

...I'm just imagining Rainer right now, using a flamethrower on a moped...
...I would probably stay away from that as well, otherwise the dirt would be the least of the problems!

Maybe the 'Finger' could put something suitable together about that .
I tackled the problem using brake cleaner.

Who is 'the finger'?
I also did the break-in process in several stages, letting the exhaust manifold cool down in between.
PS: The Kärcher with hot water and detergent addition didn't work particularly well either, but it made a huge mess... (I'm an environmentalist).

I'm afraid of trying to get that thing off my head.

After I broke 2 wheel studs on a Previa using a "short" wheel nut wrench, I definitely hit my head - Torque monster .

m;

Check this out if you want to learn about fingers: www.fingers-welt.de
Yes, the Rainer flamethrower could potentially be used in some way as a kind of stand-alone heater with a shorter warm-up time.

Hi!

Definitely expand it.

Mixture of gasoline + biodiesel + a new boiler brush!

It worked perfectly, and I got it done in no time at all, flawlessly! (Time spent: approximately 1.5 - 2 hours)


Best regards: Marko

Hello,

I can only recommend taking the bridge apart, piece by piece. The surprise was significant because three of the six screws were completely loose, and as a result, my turbocharger pressure problem was resolved.
I soaked the bridge in gasoline. With a brush and a sponge, the dirt came off very easily.
Apparently, VW has changed the gasket for the cylinder head. The original gasket was made of cardboard with metal inside. The new gasket is made of aluminum with plastic. Make a better impression.

Hmm, that could really backfire... I've always cleaned moped exhaust systems by using a rust converter spray gun and a mixture of gasoline and diesel.
It produces a flame that is approximately 2 meters long with a diameter of 30-50 cm. This causes the burning (and combustion) to happen very quickly.


Oh, that burning sensation...

Take an oxy-acetylene welding torch, properly preheat the pot, ignite the flux layer at the front, carefully adjust the C2H2 flow, and let the oxygen continue to flow. It works really well .

But for an aluminum intake manifold? I think it's better to prevent problems than to fix them later.

CU Gremlin.