[FRporscheman]

I got the head machined, and they kindly washed the whole thing for me, so the junk in the intake ports is gone. However, the intake manifold itself has considerable gunk. Right at the end of the runners, there is a coating of gunk (oily greasy black junk) about 1 or 2 mm thick. I can clearly see this coating goes deep into the manifold, into all the intricate plumbing and crevices I can't reach with a rag or toothbrush.



How do I clean it? Is there a place I can take it to, where they clean complex intake manifolds? I hope so! I'd rather not have to fill a trash can with gasoline and submerge my manifold over night.

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[Mark]

This what RSBarn used on mine and several others



http://www.run-ritestore.com/Detail.bok?no=3



Cleaned out all the nasty gloop out of mine.

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[flash]

aaaaacccck!



gasoline is not a good solvent - please don't do that - it's dangerous and it's dangerous



if you don't want to remove the manifold, you can go to a run-rite place and get it scrubbed out



if you have the manifold off you can use carb cleaner and a bendable wire brush

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[rustech]

if you have the manifold off you can use carb cleaner and a bendable wire brush

Second that.

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[FRporscheman]

That intake snake looks like it would work really well on a normal intake, for example a 951 intake, but I can't see it reaching all the internal places of the 968 intake. Please correct me if I'm wrong.



The intake is sitting on the table. From the way it looks (convoluted maze of tubes) it looks impossible to clean it all out with a wire brush. I don't want to clean it and get a lot of gunk out, I want to clean it and get all the gunk out. I want to get it as clean as humanly possible and forget about this intake for a long time.



From my experience gasoline is an excellent solvent, especially for oil-based gunk and grime (or even just dirt, but I use simple green for that) on engine and car parts.



Again, please correct me if this sounds wrong. I'm not an expert; I'm just good with tools.

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[flash]

it really isn't a maze, and is pretty easy to get in there



as for gasoline being a good solvent, this is very deceiving, and a common mistake - my grandfather used ot do that until a can bust into flames up on him - there is plenty of material out there on the "why this is a very bad idea"



any residual gunk left in there will be fuel charged and highly volatile particles when they break loose - they could either create hot spots or actually detonate in the cylinders



further, the vapors are EXTREMELY flammable - that is why it makes a good fuel - it is specifically designed to atomize, mix with the air, and ignite - one spark and poof



spills are extremely difficult to deal with - gasoline flames are very hard to put out - disposal is very difficult and dangerous



PLEASE do not do this - use a solvent intended for the purpose

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[gryphon]

I have utilized radiator shops for cleaning and degreasing various parts, such as motorcycle intakes/exhausts etc., before having them plated. They do a great job. Obviously it is important to verify that their chemicals are compatible with the metals you are cleaning to prevent damage.



Tom

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[FRporscheman]

I'll go look for a radiator shop. I also thought I could just go back to my local machine shop and ask if their wash tank was 'for hire'.



I noticed these large round metal plugs on the intake manifold, one on the side and one on the back. They look like they need a special tool to get them open, like a female version of a screwdriver, but I think these grant access to the inside of the intake. That would make it a breeze to clean out. Though, I doubt these plugs were meant to ever be removed, so I would assume there's a pound of loctite on them.



Alright, I'll stay away from the tub of petrol. But I still think half a cup of gas in a pan, with a toothbrush, is more effective than a whole can of carb cleaner. I guess I just have an affinity to gas... like a Frenchman and wine.

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[flash]

bring the manifold over - i'll clean it - i have everything here to do it



i really don't want to see you use gas as a solvent - besides leaving residue behind that becomes varnish later, it is just not as good as a real solvent

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[PorscheDude]

Should only cost 10 bucks at the rad shop. I will be alot cleaner.



When I ccleaned mine I used carb cleaner and long brushes. It took about an hour.

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[FRporscheman]

Of all the radiator shops in this foul city, there is only one that will wash an intake, and they want $110 and 4 days. Haha, I thought they were joking but they weren't, so I left. I'll do the best I can and just live with it that way.

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[gryphon]

For $110 you could probably buy a degreasing tank and solvent at Harbor Freight.



Tom

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[FRporscheman]

Tom, I wish I would have read your post before going at it. I'd love to have my own washing tank... maybe I'll just go buy one anyway. Well at any rate I got the manifold fairly cleaned up. I used a cup of "solvent" and a toothbrush to loosen all the grime in the intake runners, then I poured more "solvent" into the intake and swished it around as much as I could. I repeated this process until it looked clean inside from every view angle, which took maybe a gallon total. Then I used a whole can of carb cleaner to finish it off and clean the last bits of gunk. There's probably more crap in there still but from every opening, it looks clean.

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[Simuse]

What is the best way to clean the gunk out of the intake ports?

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[94SilverCab]

RS barn reccomends Run Rite. The service must be performed at a service center. do a search for your area.

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[Simuse]

[quote name='94SilverCab' post='48872' date='Mar 8 2008, 07:31 PM']RS barn reccomends Run Rite. The service must be performed at a service center. do a search for your area.[/quote]



Great...thanks!

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[SILVY968]

Simuse,



Check with Monty @ Redmond European.



Brian

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