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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Lost vanos seal o-ring HELP! :(



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      09-20-2014, 04:24 AM   #1
Asps91
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Lost vanos seal o-ring HELP! :(

Hi guys,

While cleaning my vanos solenoids on my n54 335i today I think I quite possibly dropped one of the rubber seals into the cam chain drive as I can't find one of them . I'm going to go and get new ones to replace (thought I was going to re-use the original ones as I have a low mileage car).

I'm going to drop the inspection tray tomorrow and have another good look in the engine bay, but if worst case scenario if the rubber seal has gone into the cam chain drive would it cause damage as it's only soft rubber? Any chance of it blocking oil lines ect....

Freaking out now. Any help would be much appreciated!
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      09-20-2014, 10:36 AM   #2
JamesM3M5
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I'm pretty sure you'd have to shove the o-ring into the engine intentionally. It's probably fallen down onto the front of the engine/subframe/piping/hoses or in the undertray.
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      09-20-2014, 10:39 AM   #3
Pr335bob
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Same thing happened to me I was going crazy. I found it in the undertray. So thank god it never went in. Give it another look
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      09-20-2014, 12:10 PM   #4
hugus311
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Same thing happen to me. It turned to be still seated and it never actually came out with vanos solenoid. I just figured i droppped it in the pan or inside.
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      09-20-2014, 06:21 PM   #5
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Same shit except the o ring did fall thru I was able to find it with a Milwaukee flexible camera and snake it out but I was told by numerous bmw mechanics that it's not small enough to clog oil flow and most likely won't be an issue because to drop the pan its a lot of work u have to take off the sub frame ouch! But regardless u need that o ring go the dealer u can get them there for like 5 10 bucks good luck
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      09-21-2014, 08:11 AM   #6
Asps91
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Thanks for the response guys, I've dropped the under tray and couldn't find anything. I've also had a mate with a camera have a search and couldn't find anything inside. Might be wedged somewhere else but we couldn't find it. I'll just go down to bmw tomorrow and grab some new ones.
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      10-04-2014, 07:48 PM   #7
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Does only 1 of the solenoids have an o-ring? I cleaned my old ones & am putting them back in, but I can only find 1 o-ring
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      10-04-2014, 07:48 PM   #8
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Also, I've dropped the undertray
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      10-04-2014, 10:52 PM   #9
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Quote:
Originally Posted by Giggling_Donkey View Post
Does only 1 of the solenoids have an o-ring? I cleaned my old ones & am putting them back in, but I can only find 1 o-ring
There's 1 o ring per vanos if they don't come out with it on the solenoid then it's inside the rim of the hole going into the cam chain drive
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      10-05-2014, 01:04 AM   #10
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2007 BMW 335i  [0.00]
The chain that drives the cam, and all other engine components would chew that ring up without batting an eye. If it fell into the engine it may obstruct oil flow but that would be rare. Between heat and metal I believe it would come out in an oil change bud.
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