Improving door rubber to window seal on coupes

BillyBob

BillyBob

Active member
Howzit gents

As the topic states, I'm looking for a way to moisturize / plump up the door rubbers on the E92 so they seal tighter against the windows.

I've got very slight wind noise coming from the top rear corner of the driver's door at highway speeds - but I inadvertently found out the other night that it gets stupidly loud at close to double the national speed limit.

I seem to recall glycerine or baby oil helping with the seal - but don't particularly fancy a permanent fatty layer on the window.

Has anyone found a cure for the problem on their E36/46/92? Or is it time for new rubbers?
 
Peter@AEW

Peter@AEW

BMWFanatics Advertiser
Official Advertiser
Bawb...the old copiers from NASHUA were supplied with silicone oil.
If you can get your hands on that stuff and apply to the rubbers.
 
K

kilotango

New member
find some shield silicone spray from any DIY shop, and spray the liners everyday for a few days..then it should improve. from there can do it once every few days/weeks/whenever.

have the same issue on my e46, and it works wonders. does the job for squeeky door liners and suspension bushings too :)
 
W

Woodies

Well-known member
BillyBob said:
Howzit gents

As the topic states, I'm looking for a way to moisturize / plump up the door rubbers on the E92 so they seal tighter against the windows.

I've got very slight wind noise coming from the top rear corner of the driver's door at highway speeds - but I inadvertently found out the other night that it gets stupidly loud at close to double the national speed limit.

I seem to recall glycerine or baby oil helping with the seal - but don't particularly fancy a permanent fatty layer on the window.

Has anyone found a cure for the problem on their E36/46/92? Or is it time for new rubbers?
Click to expand...

Hahahah, yeah at 240km/hr there ain't much you can do, but silicone based spray has worked best for me.
Don't bother getting new rubbers/seals as this problem seems to exist even in the brand new coupes. I find the seals better on my E46 coupe better than my E92.
 
Weskus330d

Weskus330d

New member
BillyBob said:
Howzit gents

As the topic states, I'm looking for a way to moisturize / plump up the door rubbers on the E92 so they seal tighter against the windows.

I've got very slight wind noise coming from the top rear corner of the driver's door at highway speeds - but I inadvertently found out the other night that it gets stupidly loud at close to double the national speed limit.

I seem to recall glycerine or baby oil helping with the seal - but don't particularly fancy a permanent fatty layer on the window.

Has anyone found a cure for the problem on their E36/46/92? Or is it time for new rubbers?
Click to expand...

Hi

you should use a rubber restorer the one I know is Fedron.
 
Fordkoppie

Fordkoppie

///Member
Everyone on Miata.net swears by this stuff

303-aerospace-16oz.jpg


If you find a place that sells it, please notify me as well:skit:
 
zippy320

zippy320

Well-known member
Do these things leave any residue , stickiness , marks on the car where the rubber meets the metal on the door surrounds?

My cousin used to do that to his car , and I always found that stickiness , mixed with dust and sand , When wiped clean you could see that fine scrape and scratches on the paintwork .

I need to try and put something on the seals of my E30 and Benz but im afraid of those scratches can inviting rust .
 
444YYY

444YYY

Honorary ///Member
Fordkoppie said:
Everyone on Miata.net swears by this stuff

303-aerospace-16oz.jpg


If you find a place that sells it, please notify me as well:skit:
Click to expand...

Crazydetailer can possibly import it...
Can't remember if they did stock it in the past...
 
zippy320

zippy320

Well-known member
I had bad bad bad experience with using Vaseline on any rubber items ,When I was young and inexperienced I used to use it on my fishtanks , for the pump seals and joints etc , The Vaseline worked for a while but over time it dissolved and destroyed anything rubber , some rubber pipes turned mushy , some got hard and cracked , the O rings used to be the same. Over time with the heat the vaseline used to get hard as well . I keep Vaseline away from my car at all costs . I remember my dad used to use it on his Carolla in the 80s , and i always wondered why there was this sticky black thing on the door , turns out it was the rubber melting . I dont know if things have changed but no no.

For now until i find something better that does not leave any marks on the car, im using maguires plastic and rubber trim detailer , I put it on , leave the doors open , let it soak in for a while , after that I wipe it down with a clean dry cloth . It seems to work and im not getting any marks on the surface where the rubber meets the door.




MikeR said:
:coolShake: Vaseline is the old tried and tested - smear on and wipe off excess.
Click to expand...
 
BillyBob

BillyBob

Active member
Thanks for the replies gents..

And therein lies the rub of it - everyone seems to have a different opinion or method...

I can tell that the previous owner of the car used an oil compound of some sort, that got dust on it - the top of the window has tons of tiny scratches all over it.

Silicone spray or dedicated trim/rubber treatment products seem to be the solution.

First off, my concern lays in getting the rubber plumped up and supple, and thereafter just maintaining it.

MikeR said:
:coolShake: Vaseline is the old tried and tested - smear on and wipe off excess.
Click to expand...

Oh hell no... Initially, Vaseline makes it soft and supple, but over time, the petrochemical composition starts to decompose the rubber...
 
StifflerPE

StifflerPE

New member
Howzit,

Wurth make a pure silicone spray / aerosol that should do the trick.
And it should be freely available.
Spanjard also do one ( builders warehouse )

The main use of my silicone spray is for my airsoft guns, Silicone expands the rubber O rings, assisting with the seal and also not doing any harm to the rubber components.

Cheers :thumbs:
 
R

RonCT

New member
I used this foam tape, stuck directly onto the rubber seal and it works pretty well. Bought it at a Builders / Midas.

dscn1833_53768735.jpg
 
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