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Old 02-20-2014, 09:09 PM   #1
reyes186
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Cooling pipe. Help

Hi' everybody, I was doing my CCV and oil filter housing gasket and when ever I took off the oil housing this pipe #8 was leaking cooling. Now I know why I was loosing cooling and my cooling light coming on. Thank for the help . Click image for larger version

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Old 02-20-2014, 09:14 PM   #2
Stinger9
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Congrats on finding what was causing your problem.
Condolences for finding it's your composite coolant line.
This will definitely require removal of the intake manifold.
Naturally you will replace both hard pipes when you are in there.
Know that they only go in in a certain order. One kind of sits on top of the other.


What year and mileage car do you have?

Last edited by Stinger9; 02-20-2014 at 09:15 PM.
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Old 02-20-2014, 09:15 PM   #3
Zardoz33
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Intake manifold has to come off. I wanted to change #6 and #8 until I found that out. However, since you're leaking from it.......good luck.
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Old 02-20-2014, 09:33 PM   #4
reyes186
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Damn didn't wanted to take off the manifold, my it's a 2001 325i with 185k miles ..


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Old 02-20-2014, 10:49 PM   #5
reyes186
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Nevermind it should be easy I already have everything taking apart only thin I have there having it's the intake manifold all I have to do is take the 8 screw holding it and that's it correct ..

http://forum.e46fanatics.com/showthread.php?t=901967




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Old 02-20-2014, 11:22 PM   #6
Stinger9
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Originally Posted by reyes186 View Post
Damn didn't wanted to take off the manifold, my it's a 2001 325i with 185k miles ..
Yeah, usually it's a high mileage car that needs new composite pipes.
Not impossible, but not as easy as you make it out to be.
Gas line intimidates me a bit. Have to disconnect the fuel rail from the gas line, or take it off the injectors. I've done the injectors (where you'd need new O-rings) and it's tedious.
Which way will you go?
Also consider new knock sensors while they're so exposed. (If they're relatively cheap)
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Old 02-20-2014, 11:44 PM   #7
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I was thinking of just getting a new o-ring for the pipe it's not like the other hoses. This pipes usually have a o-ring on top of the pipe. Idk now that you just told me about the fuel lines I got a little scare lol . Will see what happen I will take another look again ...


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Old 02-20-2014, 11:54 PM   #8
Zardoz33
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Originally Posted by reyes186 View Post
Nevermind it should be easy I already have everything taking apart only thin I have there having it's the intake manifold all I have to do is take the 8 screw holding it and that's it correct ..

http://forum.e46fanatics.com/showthread.php?t=901967
His diy's are very informative but remember: he has the engine off the car, so it appears to be an easy job. Seeing his post is what made me think it was easy but Stinger and couple other guys politely talked me out of it. lol

That being said, you obviously don't have a choice. On the plus side, there are o-rings, parts and vacuum hoses you can very easily replace once that manifold is off. I have about 15K less miles than you and all of my vacuum hoses were beyond brittle.

I removed the secondary check valve's & vacuum control valve's hoses on the manifold's rear yesterday. That was the biggest pain in the ass....ever. Do the engineers have the hand size of 6 year-olds? My hoses were so corroded, they were completely stuck onto the male-ends of those parts. I felt 2 other vacuum hoses that I have no clue where they go but going to replace them. Lastly, the brake booster hose on the manifold's underside.....oh man..... I'm attempting one more trick to try and replace it before giving up.
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Old 02-21-2014, 01:21 AM   #9
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I was thinking of just getting a new o-ring for the pipe it's not like the other hoses. This pipes usually have a o-ring on top of the pipe.
Sorry to burst another bubble, but the ends of those composite pipes get brittle and crumbly. There're not that expensive and you'll get a satisfying feeling installing brand clean new ones!
Let me put it another way; after you do all the labor to get down to that point, and backing out too of course, would you want to go in again in another few months when you spot another leak?

Do your research: www.furiousmethod.com

Take care going in and take pics and sort things properly. Easy to forget where things go when trying to reassemble.

Last edited by Stinger9; 05-08-2014 at 05:39 PM.
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Old 02-25-2014, 11:08 PM   #10
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Update--- well I decide to replace the pipe, about the intakes manifold it it's that hard, I didn't had to take of any of the fuel lines,I just unbolt the intake manifold to lift it up a little enough to get a wrench to unbolt the pipe from the the other end. This pipe it's a must replacement must !!!! I thought I only needed new seals but looking at it and looking at the new pipe it's pretty bad. Thanks for the help guys all I'm waiting now it's for some others parts to arrive and the car should be back running. I also clean up the throttle body. Click image for larger version

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Old 02-25-2014, 11:15 PM   #11
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Pipe ends are typical at your mileage. In a rough environment.
Good work. Good pics.

Throttle body looks clean. No ICV cleaning?
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Old 02-25-2014, 11:39 PM   #12
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I also clean up the throttle body.
What did you use to clean it?
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Old 02-25-2014, 11:40 PM   #13
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Yes Clean up everything. Car should be running very good right ?


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Old 02-26-2014, 12:04 AM   #14
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I clean the throttle body with carb+choke cleaner and a little of dish soup after that with a metal sponge I saw that on the someone else post in here ..... It turn out pretty good it's shinny..


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Old 02-26-2014, 12:41 AM   #15
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Wow those pipes are nasty! Nice job at replacing them.

Quote:
Originally Posted by reyes186 View Post
I clean the throttle body with carb+choke cleaner and a little of dish soup after that with a metal sponge I saw that on the someone else post in here ..... It turn out pretty good it's shinny..
Metal sponge, meaning a steel wool pad? Hopefully you didn't use that on the tb's inside part. Looking at the flap....it appears to be all marred.
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Old 02-26-2014, 01:12 AM   #16
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What did you use to clean it?
Brake cleaner works real good.
Don't get the environmentally good version. Doesn't work.
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Old 02-26-2014, 01:14 AM   #17
reyes186
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The sponge it used to wash dishes i didn't mess up the flap or anything... It's safe to used trust me... I don't what this sponge call so I just call it metal sponge lol, English it's not my main language...


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Old 02-26-2014, 01:17 AM   #18
reyes186
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Brake cleaner works real good.
Don't get the environmentally good version. Doesn't work.

YEs brake cleaner also works fine ...


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Old 02-26-2014, 06:44 AM   #19
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Good stuff, is super shiny!
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Old 02-26-2014, 09:22 AM   #20
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There are a lot of cars that are still using metal pipes in applications like this. It's too bad BMW didn't do the same - it should be a lifetime part.

Nice work, by the way...
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