Vacuum tubes.

Anubisxc70 · Feb 26th, 2018, 21:37

2004 XC70 D5 awd.

Hello....I would like to know your opinion about the vacuum tubes.
I have replaced my vacuum tubes to the engine mounts with silicone vacuum tube, 4mm change the T all is good. Do you think i can also change the ones that go from vacuum pump to the boost solenoid and then to turbo? I ask because this are made of hard plastic,and they have a mesh, maybe because of temperature...this silicone vacuum tube hold to 200 degrees Celsius....so i guess they will not melt.
What you advise?
Thank You

pierremcalpine · Feb 27th, 2018, 12:20

Sorry don’t have an answer for you but would be very interested in someone else’s thoughts as I’m going through the same job on mine to try to get rid of an air intake leak.

Georgeandkira · Feb 27th, 2018, 12:29

I've always replaced with silicone. The "rubber" stuff stiffens, leaks and seems to become graphite.
With turbos in the family for years I've never had any problems with silicone vacuum hose; even long runs.

Years ago a Toyota parts man gave me "siliconized" 4mm hose which actually felt like a 50:50 mix of old stuff and pure silicone. It was better but today the silicone product is no longer a "super premium" product.

I use blue vacuum hose as it looks real cool under the hood

Feb 26th, 2018, 21:37	#1
Anubisxc70 Master Member Last Online: Sep 25th, 2021 23:16 Join Date: Aug 2017 Location: Sturminster Newton	Vacuum tubes. 2004 XC70 D5 awd. Hello....I would like to know your opinion about the vacuum tubes. I have replaced my vacuum tubes to the engine mounts with silicone vacuum tube, 4mm change the T all is good. Do you think i can also change the ones that go from vacuum pump to the boost solenoid and then to turbo? I ask because this are made of hard plastic,and they have a mesh, maybe because of temperature...this silicone vacuum tube hold to 200 degrees Celsius....so i guess they will not melt. What you advise? Thank You Last edited by Anubisxc70; Feb 26th, 2018 at 21:39.

Feb 27th, 2018, 12:20	#2
pierremcalpine Premier Member Last Online: Jan 3rd, 2024 14:43 Join Date: Feb 2012 Location: Toronto Canada	Sorry don’t have an answer for you but would be very interested in someone else’s thoughts as I’m going through the same job on mine to try to get rid of an air intake leak. __________________ 2003 V40 1.9T B4204T4, 197,000miles (sold but alive!), 2004 S60 2.5T, 160,000miles, 2010 V70 3.2, 125,000miles, 2002 V70XC 2.4, 175,000miles Click here for my x40 and V70 P3 repair guides

Feb 27th, 2018, 12:29	#3
Georgeandkira Premier Member Last Online: Yesterday 13:23 Join Date: Feb 2009 Location: Hackensack	I've always replaced with silicone. The "rubber" stuff stiffens, leaks and seems to become graphite. With turbos in the family for years I've never had any problems with silicone vacuum hose; even long runs. Years ago a Toyota parts man gave me "siliconized" 4mm hose which actually felt like a 50:50 mix of old stuff and pure silicone. It was better but today the silicone product is no longer a "super premium" product. I use blue vacuum hose as it looks real cool under the hood Last edited by Georgeandkira; Feb 27th, 2018 at 12:31. Reason: removal of foul language

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