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pipe that is pressed in

7

7window

Golden Member
I have a nissan beater that I drive. I need to replace a pipe that is pressed in to the manifold. How would you guys remove the pipe? Do you need a tool to remove it or do you just pound the hell out of it? Thanks
 
JulesMaximus said:
I'd try penetrating oil and a big hammer.
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It's probably a plastic or cast aluminum manifold, bad idea. And I'm guessing he's trying to pull it out.

Is this a vacuum or coolant fitting or something?

If it's a plastic manifold, it's probably glued in with something like JB Weld or pressed into the plastic in the mold and you're not getting it out without cracking the manifold unless you cut it off with a hack saw and tap/drill out the remaining sleeve.

If it's an aluminum manifold, it should be threaded with pipe thread.

If it's really pressed in, you can use a bolt or a tap die or something to bite into the fitting then keep turning and hope the fitting spins before the insert breaks :awe: Or you can just try your luck with a pair of vice grips. I'd suggest hammer and punch, but you probably can't get to the back side of it.
 
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exdeath said:
It's probably a plastic or cast aluminum manifold, bad idea. And I'm guessing he's trying to pull it out.

Is this a vacuum or coolant fitting or something? If it's a plastic manifold, it's glued in with something like JB Weld and you're not getting it out without cutting it off with a hack saw and tapping/drilling out the sleeve.

If it's an aluminum manifold, it should be threaded with pipe thread.

If it's really pressed in, you can use a bolt or a tap die or something to bite into the fitting then keep turning and hope the fitting spins before the insert breaks :awe:
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He said manifold, I just assumed exhaust manifold.

More info is needed I guess.
 
I am still trying to figure out how to insert a pic here.

This is an intake manifold not the exhaust manifold. There is pipe that is corroded that is attached to the manifold. The pipe is pressed in and now corroded. The hose attached to it is coming from the radiator. I was going to take the pipe off that is pressed in and replaced it then weld. I believe this is aluminum.
 
Btw it is not threaded which really suck because you have to replace the whole manifold. Part (pipe)is not available in the dealer. However the whole manifold is available.
 
Drill it out.

Assuming it's a vac fitting or something similar you can tap the hole and thread in a new fitting. Use teflon tape to avoid corrosion in the future.

Edit: unless you're 100% sure of the alloy in the manifold welding it could be very problematic.
 
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He just said it is connected to the radiator hose, so it is part of the cooling system.
Again, Make / Year / Model / Engine Size / Trans Type are a big help so things can be looked up

To add a picture, you need to upload it to a free pix hosting site, then copy the URL of the picture. Use the Icon to the Right of the Add URL Icon
 
st06vert


here is the picture.

http://s210.photobucket.com/albums/bb110/st06vert/?action=view&current=nismo.jpg&newest=1

The part in question is circled in red.

st06vert
 
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time for a new manifold....it will be very difficult, if not impossible to repair unless its take to a machine shop or fabricator...there is always the used manifold option...
 
Whats that bolt for on top? Sure it's not just stuck in there with an o ring and secured with a bolt? Either way your biggest concern at the moment is even if you do get it out, what are you going to replace it with?
 
The bolt on top is for bleeding air out of radiator. I was hoping to replace or fabricate a pipe just like the one in the picture and this time weld it into the manifold. It shouldn't be too hard. The question now is will the iron pipe weld into aluminum intake manifold can they be welded together.
 
7window said:
The bolt on top is for bleeding air out of radiator. I was hoping to replace or fabricate a pipe just like the one in the picture and this time weld it into the manifold. It shouldn't be too hard. The question now is will the iron pipe weld into aluminum intake manifold can they be welded together.
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...uh i don't think you can do this. are you sure this brass looking fitting isn't pressed in from the intake manifold side with a flange or something that prevents you from pulling it out on the outside?

if you want to get rid of it, it may be possible to put a slit in the pipe alone and use pliers/vise grips to crush it and get it out of the way. even then you would have to replace it with a exact piece of metric(?) tubing. you could take it to a shop and have them aluminum weld it (gas setup) or there are brazing and even soldering rods you could use.
 
You can't weld steel and aluminum together. No way, no how. Time for a new (or used) manifold.

That pipe appears to be in pretty good condition from what is visible in that picture. Is the pipe itself corroded or is it leaking where it's pressed into the manifold? On an old beater you might just get by for a long while with some cooling system sealer added to the antifreeze. Go down to the closest GM dealer and ask at the parts counter for cooling system seal tabs. They're sold in packs of two IIRC.

They're not going to fix a big leak though. They're good for little weeping leaks.
 
I may have missed something, but is it leaking? If everything works/nothing leaks and it's just corroded, leave it be (unless it's obviously about to break or something).
 
from boomerangs post, it doesn't sound good that I can weld aluminum and the steel pipe together.

Yes it is leaking and the picture is a pic I borrowed. The pic is the same as mine but mine is worst looking than that. I don't have a digital camera right now. Mine looks good outside but it is corroded and leaking.
 
7window said:
from boomerangs post, it doesn't sound good that I can weld aluminum and the steel pipe together.

Yes it is leaking and the picture is a pic I borrowed. The pic is the same as mine but mine is worst looking than that. I don't have a digital camera right now. Mine looks good outside but it is corroded and leaking.
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Definitely cannot weld steel to aluminum, but if you can figure out what alloy the manifold is you could weld an aluminum pipe to it.
 
AGAIN year, make, model, and options.

You might be able to drill it out and thread in a new spout. Not sure the hose size or thickness of the area in that manifold.
 
If it's the pipe leaking and it's not at the seam where it meets the manifold, you might consider taking a wire wheel to it and then patching it up with some sheet brass/aluminum with solder, depending on the material. Welding something that thin is tricky and requires an experienced welder with the right kind of welder (tig). If the bad part is far enough out, you could cut the pipe leaving 1/4" behind, then pay a professional welder to butt or collar weld on a new extension if the material doesn't lend itself to soldering. Or just scuff up the remaining lip you leave and JB Weld an extension collar depending on how ghetto you want to be and how much it's worth to you.

Again the problem is that pipe is a specific part of that make and model. Even if you get it out, what are you going to replace it with? You can find coolant hose fittings in various industry standard flanges, pipe thread sizes, etc, but you're likely not going to find anything that exactly press fits in exactly like the old one did.

That's pretty crappy though, aluminum manifold and another metal insert, both current flowing through them from the chassis ground D:
 
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Hard to see from the picture, but that normally would be the thermostat housing and usually would unbolt from the intake manifold.
 
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