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Thread: The Random E46/ZHP Question Thread

  1. #7861
    Join Date
    Aug 2014
    Location
    Leesburg, VA
    Posts
    963
    Quote Originally Posted by san View Post
    When do folks replace the hard coolant lines under the intake manifold? Im at 205k miles and haven’t done it yet.
    Same question about the control arms as well.
    I'd say you're on borrowed time with the coolant lines. I haven't had failure, but replaced them "while in there" at 125k.
    Control arm bushings can be shot at 60k. Ball joint life span can depend on how it's driven.
    Last edited by John in VA; 09-14-2021 at 10:33 AM.
    2006 330ci ZHP - Silbergrau Metallic / Stoff Laser/Anthrazit / Alu Black Cube trim / Adaptive Xenon headlights / HK hi-fi system / heated front seats

  2. #7862
    Quote Originally Posted by John in VA View Post
    I'd say you're on borrowed time with the coolant lines. I haven't had failure, but replaced them "while in there" at 125k.
    Control arm bushings can be shot at 60k. Ball joint line span can depend on how it's driven.
    Any ďwhile Iím in thereĒ components i can replace when I replace the coolant line?


    Sent from my iPhone using Tapatalk


    2006 Coupe | Black Sapphire Metallic | Natural Brown | Gruppe M Intake | Corsa TSE3 | Michelin PSS on Apex ARC-8 | Koni Yellows |

  3. #7863
    Join Date
    Aug 2014
    Location
    Leesburg, VA
    Posts
    963
    Quote Originally Posted by san View Post
    Any “while I’m in there” components i can replace when I replace the coolant line?
    Since/if the intake manifold is coming off, the sky's the limit! Much of the stuff on my car was original/16 years old, so I started at the radiator & worked back to the firewall to include all heater hoses - water pump, tensioners, belts, fan blade, expansion tank, coolant hoses, intake gaskets, valve cover gasket, sparkplugs, oil filter housing gasket, power steering reservoir & hoses, CCV parts. Probably forgot something!
    2006 330ci ZHP - Silbergrau Metallic / Stoff Laser/Anthrazit / Alu Black Cube trim / Adaptive Xenon headlights / HK hi-fi system / heated front seats

  4. #7864
    Join Date
    Jun 2012
    Location
    Socal
    Posts
    1,504
    Quote Originally Posted by san View Post
    Any “while I’m in there” components i can replace when I replace the coolant line?


    Sent from my iPhone using Tapatalk
    I replaced it at 80k. There were some broken plastic bits on the inside. I only did it cause SC will be a bitch to take off later.

    • I did the dip stick o-rings (got viton for the bottom one)
    • since you're taking off the manifold, you'll need the intake gaskets.
    • The starter. People say it's easier with the transmission out, but I think it's easier with the intake manifold out.
    • I also replaced the lower hose that connects to one of the coolant hard lines
    • That stupid fuel vent hose that connects to the side of the intake manifold, I replaced that with a way longer one lol
    • Since you're taking off like all the intake stuff, clean TB, TB gasket, clean/replace ICV, ICV gasket, DISA/gold DISA, new intake hoses/air filter
    • CCV and all the hoses connected to it
    • clean the fuel injectors (didn't do this cause my injectors will be replaced)


    while you're in there is dangerous lol I replaced some other things along the way. But it wasn't related to being under the manifold. But it was just easier since it wasn't in the way.

  5. #7865
    Quote Originally Posted by John in VA View Post
    Since/if the intake manifold is coming off, the sky's the limit! Much of the stuff on my car was original/16 years old, so I started at the radiator & worked back to the firewall to include all heater hoses - water pump, tensioners, belts, fan blade, expansion tank, coolant hoses, intake gaskets, valve cover gasket, sparkplugs, oil filter housing gasket, power steering reservoir & hoses, CCV parts. Probably forgot something!
    Iíve replaced everything from your list except for intake manifold gasket. So I will add that. Isnít there a coolant temp sensor somewhere on the engine block which is accessible only when the intake manifold is removed?


    Sent from my iPhone using Tapatalk


    2006 Coupe | Black Sapphire Metallic | Natural Brown | Gruppe M Intake | Corsa TSE3 | Michelin PSS on Apex ARC-8 | Koni Yellows |

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