BMW E46 Underside RUST Points - LOOK at

BMW E46 Underside Corrosion Points to consider - LOOK at 7:30 minute!
This is a highly detailed look at the Underside of a BMW E46 (M3) to show some of the corrosion (rust) points which we (Redish Motorsport) commonly see in the UK.
Some of these corroded points are very minor and don't look like they're worth working on.
Many will know us for our Redish Motorsport E46 RACP Repair/Reinforcement Process which we've been evolving since 2011:
www.redish-motorsport.com/E46M...
Along with our Underside Restoration KZbin documentaries, we've built up arguably one of the world's greatest knowledge bases for the E46 underside chassis and corrosion points over the past 8 years.
So we're sharing our information on the subject to try and help owners understand some of the points you should consider when buying, repairing, reinforcing, or even restoring a BMW E46.
Just look how average the Underside 25mm grommet hole looks on first inspection at 6:32
Then fast forward to 8:50 to see how much corrosion was trapped (and growing) under that Seam Sealer!
That's the sort of corrosion issue nobody wants to find, and that's why we're sharing this video - to try and help people understand the locations and areas that are common corrosion spots on the Underside of the BMW E46 chassis.
Please share to your E46 friends/forums/facebook groups if you think it may help someone.
Don't forget to like the video and subscribe for more interesting BMW-only content.
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[@campbellab]

What are e9xs looking like underneath?

[@RedishMotorsportbmw]

kzbin.info/www/bejne/noa7kox7g76MhKs

[@sjoroverpirat]

@@RedishMotorsportbmw is the e9x chassis better than the e46? Only considering corrosion and welds

[@DodgeCity111]

You must have neck muscles like Michelangelo who painted the ceiling in the Sistine Chapel.

[@driftworks]

Thanks for the video guys. I've had 6 or 7 people comment on my V10 M3 restoration video to say 'you should take it to Redish'. I've been a bit out of the loop with E46 stuff for a while so I'd not heard of you. Looks like you do great work & the video will be very helpful when checking out the underside later this week. Cheers. Phil.

[@RedishMotorsportbmw]

Driftworks Hi Phil, thanks for the kind words. I was watching your new E46 Ep1 video on Saturday actually. Looking forward to see your progress on V1 TEN. If we can help you with anything or just advice on E46 chassis please let us know and we'll be more than happy to help you. There's a mass of E46 M3 video documentaries on our KZbin channel which show right from 'Corrosion found' up to 'full Underside restorations'. Best regards, James Redish 😀👍

[@MrMark00024]

Massive thank you for these videos. I have redone all the rear on my old E46 M3 based on all these vids you have done. Such good work.

[@carlwood5501]

I'm in the process now

[@stubbk3]

Very informative as always. And terrifying . Sat expecting my car to fall apart around me after that 10% example...

[@bavariansleeper]

Great video. Love the passion and attention to detail.

[@Maximilian0011]

You guys are doing an AMAZING work really, all of your videos shows without a doubt that you truly know what you are doing and with an utter care, its a true delight to see it. What a find so irritating is when I hear they have gone to the moon and landed there ..." YET here on Earth they cant make a car that is rust free, its an absurd !!! its rather a simple matter to prepare the metal and make the right metal rust free!!! I am sorry, I am very upset seeing here and there some rust on my beloved e39

[@googleme2799]

That is one proper job, well done. Thanks for showing us.

[@RedishMotorsportbmw]

No worries Google Me. Thanks for your comment.

[@kl3ag1]

Redish Motorsport... giving e46 owners nightmares since 2012...

[@1rewd133]

... and hope.

[@sixcylinders6346]

Hi James, I’ve seen most of your videos and am both fascinated and impressed by your quality of work. I’ve seen several mentions of the corrosion around the central 25mm grommets and my question is “why are they there ?” It seems to me that if they were not then there would be no issues. There probably is a reason but I can’t see why. Also if you have to weld in new metal do you leave as is or do you drill and fit a new grommet? Peter.

[@Domnaek]

Hey :) Where did you get the "weld in studs" for the plastik panel nuts? Cant find them in the e46 parts cat.... And I reeeally need them :D

[@TheJanis1993]

Is theres a chart or something like that , an instruction how to remove whole floor? is it possible even? my e46 coupe floor is real bad and i need some help. thank you for the video.

[@pedropancho3128]

Doo you know someone that does this kind of video for AUDI. My C5 is showing some rust underneath and I would love to see info like this for it.

[@sttm1283]

is there a video where you show all the repairs of this rust? i have a e39(i guess i also see just 10% of all the rust :D) so what im interested in doesnt really apply to what you are showing in this video, but im kinda interested in how you tackle the problem starting at 7:30. do you cut it all out and replace or what? so many questions and so little space to reply to all of it, unless i would have been in your shop and see you work :D

[@crusher7204]

Hi man, I have exactly same problem as you show at 7:30. I gues this place is meant to rust. But I am scared to weld at this place, because there is the isolation foam in there. Is it possible to get to the foam from inside of the car, so I can remove it and weld it without setting the foam on fire? I don' t want to take apart all interior just to find out I can not get there.

[@PerfectBeast6]

How about Z4 e85? Is it going to be the same? Or better build/rust proof?

[@taranveersihra127]

Rust/panel repair on jack points e46? Please n thanks

[@Hasdac1896]

Its a shame you don't do Subaru's you would be very very very busy..the rear end on my forester is full of corrosion...

[@FishFind3000]

I’ve got some bad rust showing up now. At least it has 251k miles so it’s at its time anyway.

[@DriftSpec.]

what is the steps of correctly curing rust is their a full video of someone patching a hole or crumbling corrosion?

[@RedishMotorsportbmw]

Thanks for the question. Technically, the best way would be to remove that piece of rusted metal and weld in a new piece of non rusted metal. However, that's not always the case, so the next step would be to remove all loose surface rust, treat the rusted metal with a chemical like POR-15 Metal Prep, then paint it with something like POR-15 Rust Preventative Paint, then complete with further paint/sealer layers to protect it from the atmosphere. Hope this helps.

[@DriftSpec.]

@@RedishMotorsportbmw thanks alot, helps alot! would fibreglassing a hole like that work?

[@richlee509]

@@RedishMotorsportbmw do you use Bilt Hamber products they are exceptional for this type of work

[@becomematrix]

Just had 3 full days tackeling corrosion on my e36

[@RedishMotorsportbmw]

I feel your pain. Will be worth it in the end though.

[@becomematrix]

Redish Motorsport the knowledge of a solid jacking pad is worth it 😁

[@Kamil.fit.]

How much you charged guy to repair all of this ?

[@FishFind3000]

How many miles and years old was that car?

[@RedishMotorsportbmw]

2004 E46 M3 Coupe 83,000 miles

[@soufsidemotorsports8418]

At 7:30, I laughed...then cried.

[@LochyP]

That is terrifying

[@user-tj6gv9ws3o]

Is this a saloon or coupe

[@RedishMotorsportbmw]

2004 E46 M3 Coupe 83,000 miles

[@user-tj6gv9ws3o]

Makes me a little nervous now with my 320cd sport with 164,000 miles, although no common rust on the bodywork at all, must be a different story under it

[@mrbigarms]

It's such shame BMW should make such a lovely vehicle in the form of the E46 and let it down with poor rust prevention. My wheel arches are starting to look bad and that's just the rust I can see!

[@coupe6339]

Bmw bad quality