Tips for refitting 335i airbox....

jonnydrama · 02-20-2011, 09:51 AM

My 335i is in the dealers next week for some warranty work so I thought better safe than sorry and removed the BMS filters and JB3.....

Got the filters removed easily, The JB3 removed and wires fitted back into the ECU.

Tried literally for about an hour to push the plastic pipe ends onto the factory airbox once it was in position until I was getting properly frustrated. Took it off and sanded down the ends of the airbox a tiny bid (thinking the clamps on the BMW filters may have distorted the plastic piping) and applied some motor oil, still no good.

Eventually had a random thought to heat up the pipes so they were a bit more flexible (you can use anything I guess, heat gun or hairdryer), with a bit of WD40 they slipped on easily first time.

Hope that'll help someone if they have to do the same!

zltm089 · 02-20-2011, 10:31 AM

Thanks for posting!

Yahoo · 02-20-2011, 11:54 AM

Yep - heat up the end of the pipes with a hair dryer for a little while, this works a treat.

jonnydrama · 02-20-2011, 12:04 PM

Quote:

Originally Posted by Yahoo

Yep - heat up the end of the pipes with a hair dryer for a little while, this works a treat.

Still took me a while to think of it, never came into my head as all my previous cars have had silicone/rubber hoses

02-20-2011, 09:51 AM	#1
jonnydrama Second Lieutenant 19 Rep 236 Posts Drives: E90 335i Join Date: Dec 2009 Location: Scotland iTrader: (0)	Tips for refitting 335i airbox.... My 335i is in the dealers next week for some warranty work so I thought better safe than sorry and removed the BMS filters and JB3..... Got the filters removed easily, The JB3 removed and wires fitted back into the ECU. Tried literally for about an hour to push the plastic pipe ends onto the factory airbox once it was in position until I was getting properly frustrated. Took it off and sanded down the ends of the airbox a tiny bid (thinking the clamps on the BMW filters may have distorted the plastic piping) and applied some motor oil, still no good. Eventually had a random thought to heat up the pipes so they were a bit more flexible (you can use anything I guess, heat gun or hairdryer), with a bit of WD40 they slipped on easily first time. Hope that'll help someone if they have to do the same!
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02-20-2011, 10:31 AM	#2
zltm089 Banned 244 Rep 7,690 Posts Drives: 335i SE Coupe Space Grey Join Date: Nov 2008 Location: LONDON iTrader: (0) Garage List 2006 BMW 335i [10.00]	Thanks for posting!
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02-20-2011, 11:54 AM	#3
Yahoo Captain 42 Rep 822 Posts Drives: 335i e91 LCI msport Join Date: Jul 2007 Location: Lincolnshire iTrader: (3)	Yep - heat up the end of the pipes with a hair dryer for a little while, this works a treat.
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