[MMM335]

Anyone thought of using a different expansion tank? thinking i may go the 6 series one, will flow be impacted depending on pressure?

also anyone know the part numbers for the connector? cant find it anywhere.

[juld0zer]

Im still surprised there are no mass produced metal ones available. Getting tired of these genuine plastic things blowing up every 3 years

[rooks335]

Originally Posted by juld0zer

Im still surprised there are no mass produced metal ones available. Getting tired of these genuine plastic things blowing up every 3 years

+1

[MMM335]

Seen someone on forums using this:

what i plan to do now

[kookie]

MMM335 I see your going an engine conversion

[MMM335]

haha noooo not going to that extent

[Aus335iguy]

Originally Posted by MMM335

haha noooo not going to that extent

FYI BQ tuning posted a photo of a 740i engine and it had the same/similar looking reservoirs in the same location

BQ Tuning N54 Intake Conversion Build Prelude http://www.e90post.com/forums/showthread.php?t=1403668

[MMM335]

Seen that haha, wasnt him where i got the idea although

[juld0zer]

When mine blows again i will look into an alternative. Seems like the white plastic ones rarely blow up. I might even mount my tank on something cushiony

[TheSilverSurfer]

I looked into a metal one a while ago and none were available so I replaced with OEM.

I spotted this the other day. An aluminium replacement that I will definitely get next time.

http://www.e90post.com/forums/showthread.php?t=1394345

https://www.swbperformance.com/expansiontank/

[BLKSAPPE92]

Originally Posted by TheSilverSurfer

I looked into a metal one a while ago and none were available so I replaced with OEM.

I spotted this the other day. An aluminium replacement that I will definitely get next time.

http://www.e90post.com/forums/showthread.php?t=1394345

https://www.swbperformance.com/expansiontank/

So now instead of 1 hour of your time and the cost of expansion tank it be 3 plus hours of your time and the price of a radiator since it still has plastic.

Kinda how Audi/VW fans are about the cheap plastic impellers audi uses on water pumps that over time with heat get brittle and break apart prematurely. Instead they want a metal impeller like a Nissan which continues to work as the bearings get play and the impellers grind into the inside of the engine block.

What's easier and cheaper to fix?

[juld0zer]

Why would it be a radiator instead? They blow up almost as often as expansion tanks. Is it generally accepted that these things blow up because of excessive pressure (faulty cap?)?

Im leaning more towards excessive vibration, exacerbated by aftermarket suspension. Not that runflats and soft stock suspension is any more cushy but the tank is hard mounted without any rubber isolators on the two tabs which hold the top section (above the seam), contents of the tank and the tank's own weight. There is a small stalk on the bottom which pokes into a soft silicone damper but IMO they could mount these better, make the tank lighter, make it out of better materials

[MMM335]

e70 fair good fit, need to mod return and whatnot mount is easy requires a little stepdown piece i buy those lil bits of galvanised steel with holes at bunnings and bend to suit, expect i dropped the tank and broke the tab haha

[_ink]

Why wouldn't you just use the 335d one?

Bolts right there in the mounting points.

[MMM335]

Originally Posted by _ink

Why wouldn't you just use the 335d one?

Bolts right there in the mounting points.

because it hits the charge pipe and pulls against the sensor, if theres not a better fitting option why not use it?

[_ink]

Originally Posted by MMM335

because it hits the charge pipe and pulls against the sensor, if theres not a better fitting option why not use it?

Right, that makes sense. You didn't actually mention that here...

Not sure which CP's the 335d tank is compatible with, but mines tft.

[MMM335]

tft and vrsf 335d chargerpipe work and theres another, but in comparison to what ive paid vs chargerpipe i think ill end up infront haha.

was thinking about modding my pipe see how i go with sharp mani

[MMM335]

i got it to fit looks better fits better, will post pictures tmoz

[velaslm]

Originally Posted by MMM335

e70 fair good fit, need to mod return and whatnot mount is easy requires a little stepdown piece i buy those lil bits of galvanised steel with holes at bunnings and bend to suit, expect i dropped the tank and broke the tab haha

Hey, I saw this pic posted of your engine bay. I’m currently looking for a different expansion tank that will fit since i’ve begun relocation of the original tank but it’s tough to squeeze in with my 335i chargepipe w/ bov. With the e70 expansion tank how was fitment of the tank and did you use a 335i charge pipe or 335d charge pipe.