VANOS Solenoids and Viton O-rings - BMW M5 Forum and M6 Forums
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post #1 of 14 Old 21st July 2017, 10:36 PM Thread Starter
gmak
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VANOS Solenoids and Viton O-rings

My Viton O-rings arrived.

21 x 1.5 mm
10.1 x 1.6 mm
11.1 x 1.6 mm
12.1 x 1.6 mm

Does anyone know how to get the o-rings off of the solenoids without destroying them (in case)? I would hate to cut them off, and try to get the VITON in place, only to find that there is some fitment issue or once on the car that they hinder solenoid performance :dunno

Is there a trick to this?

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post #2 of 14 Old 21st July 2017, 10:38 PM
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Where did you get the o rings from?

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post #3 of 14 Old 21st July 2017, 10:42 PM Thread Starter
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Originally Posted by 0-60Motorsports View Post
Where did you get the o rings from?
Documented in my M5 thread... but.....

www dot oringsandmore dot com

I know. It's such an unintuitive site name.

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post #4 of 14 Old 21st July 2017, 10:43 PM
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Quote:
Originally Posted by gmak View Post
Documented in my M5 thread... but.....



www dot oringsandmore dot com



I know. It's such an unintuitive site name.


Hahhaha yeah. Awesome, thank you. Let us know how it goes please.

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post #5 of 14 Old 22nd July 2017, 02:42 AM Thread Starter
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Well until someone gives me some information as to how to remove the existing o-rings - it's probably not going to happen. I'll just install them as they are now.

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post #6 of 14 Old 22nd July 2017, 05:05 AM
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I use a stainless curved pick. Bunch the old o-ring up a bit with your fingers to make a small loop and hook the pick in it.

Or just cut them off.

They are most likely hardened anyway with any age on them. Your measurements are correct, the only thing you didn't list the spec of is the durometer rating. I use 75 durometer Vitons on these solenoids all the time, both SMG and VANOS.

Be very careful you don't use anything that will nick the o-ring lands. This can cause cutting of the o-ring later.
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post #7 of 14 Old 22nd July 2017, 05:14 AM Thread Starter
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I want to put these on my NEW solenoids - not on the old ones. However, I guess the first step will be to change them on the old ones and see if they make a difference in the tests - which were all fail when I did them last year. This would add to the knowledge of the board. Has anyone ever done this?

I guess I have to go back to ton-o-rings and check out what the durometer reading is.

Sigh. Ain't nothin' easy with this b.itch.

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post #8 of 14 Old 22nd July 2017, 04:40 PM
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Dental pick, seriously 1.50 at the drug store takes everything off.

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post #9 of 14 Old 22nd July 2017, 06:28 PM Thread Starter
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Quote:
Originally Posted by jcolley View Post
I use a stainless curved pick. Bunch the old o-ring up a bit with your fingers to make a small loop and hook the pick in it.

Or just cut them off.

They are most likely hardened anyway with any age on them. Your measurements are correct, the only thing you didn't list the spec of is the durometer rating. I use 75 durometer Vitons on these solenoids all the time, both SMG and VANOS.

Be very careful you don't use anything that will nick the o-ring lands. This can cause cutting of the o-ring later.
Durometer of the Viton FKM O-rings that I bought is 90. Will that cause any issues?

Jim: Have you tried just swapping o-rings on solenoids that don't pass to see what happens? If so, did it work?

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Last edited by gmak; 22nd July 2017 at 06:29 PM.
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post #10 of 14 Old 22nd July 2017, 06:36 PM
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O-rings to replace worn ones to perhaps give life to non functioning solenoids is one thing but you're a brave man to pull brand new orings off brand new solenoids. I don't think I'd do it. O-rings do wear out, tear, harden etc. Even viton ones. There's nothing really to suggest the ones you've bought would last better than the brand new ones on your new solenoids.

I know little about vanos but I do know about hydraulics and cars and I wouldn't touch a brand new set.

Also it seems (from what I've read online) that the o-ring issues are often from nicks cause by foreign matter in the oil. There's no way really to defend against that.

Ps. I've greatly enjoyed your thread.
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