Bottoming out problem

kennster · Feb 15, 2019

I just purchased a 2015 Passat TDI...loving it...but it seems to bottom out in the front...but the shocks seem fine..Im guessing the Passat is a softer ride than my 2011 Jetta TDI...but it seems too mushy....anyone else have this issue???

Strider17 · Feb 15, 2019

the diesels do have softer springs..

i put rear towing springs in mine and it lifted up the back end a bit..but id still like to stiffen up the front

kennster · Feb 15, 2019

Thanks Strider...i have two seadoos...was planning on putting on a trailer hitch...total weight is 1500lbs...do i need new springs on the rear??..

Strider17 · Feb 15, 2019

100% you will....with the stock springs i put my thule bike carrier and 2 bikes and the rear end was significantly lower..with just me in the car.

these are the ones i have:

https://germanoem.ca/parts/suspensi...-rear-spring-suplex-pair-1k0511115ct-sup.html

kennster · Feb 17, 2019

Thanks Strider...cheersss

Radek · Feb 20, 2019

It says these springs are for mk5/6 wagon, is it the same size as 15 Passat ?

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740GLE · Feb 21, 2019

Passat has a mk5 rear suspension so yeah they fit. Toss a mk5 rear sway bar on it too if you want to enjoy corners some more.

Passat went on a huge diet for the NMS vs the euro based B6. Comparing the curb weight of a NMS and a Mk5 jetta, the NMS is only a couple hundred pounds heavier yet has nearly twice the interior size.

Radek · Feb 21, 2019

I was comparing GSW of the same year and was surprised to see a small weight difference, expected a lot more, which sway bar do you recommend and if there's anything for the front to help with cornering ?

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kennster · Feb 25, 2019

I went to a spring place...they said that they could change all the struts to bilsteins..they are firmer than stock...that would help the bottoming out...good idea?...or should i change the springs as well??

roni024 · Feb 26, 2019

New springs would help prolong the life of your new struts. It would be a wise investment.

740GLE · Feb 27, 2019

Radek said:
I was comparing GSW of the same year and was surprised to see a small weight difference, expected a lot more, which sway bar do you recommend and if there's anything for the front to help with cornering ?

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It just shows you how much weight/bloat they cut out of the NMS!

GSW isn't the same rear end, its a mk7 on the MQB platform, GSW TDIs have twist beam, not IRS.

MK5 and Mk6 rear ends are pretty much identical seeing MK6 JSW (up until 2014) was just a warmed over mk5.

I went with H&R for their maintenance free quiet bushings, haven't had any issues in the 2 years it's been on.

Had the same bar on my MK5 for 120K and it was silent.

Fixmy59bug · Feb 28, 2019

I think the shocks and struts play just as big of a role in bottoming out as the springs do.

While the springs support the weight of the car and a fatigued spring can allow the weight to push down more, the struts and shocks have valves inside which are supposed to dampen quick or heavy movements.

In this case, since the car is a 2015 I highly doubt the springs are that fatigued already. I bet the OP would see a greater difference with swapping out the shocks and struts.

I personally recommend the Koni Special Active (previously called FSD). I have them on my car with the stock springs and the car rides SO MUCH BETTER.

kennster · Mar 10, 2019

I replaced the shocks and struts with Bilsteins....The ride is soooooo much better...it feels like my old jetta now.firm and can feel the road....not like a cadillac elderado like it used too.....thanks guys..cheers

Radek · Mar 10, 2019

Is there any way to stiffen up the rear on a passat for towing beside new springs ? I only have 25K miles and would like to avoid it if possible, looking to grab 24mm sway bar for better handling at the same time

kennster · Mar 10, 2019

I want the same thing..i have seadoos..gonna install a trailer hitch soon..i need to stiffen up the rear...

740GLE · Mar 12, 2019

Firestone air helper bags will do it. Or Air Lift ones, see if 80753 fill fit the Passat.

Air up the rear when towing then reduce pressure around town, sag will be gone.

Strider17 · Mar 12, 2019

ive had the airbag setup on my mk4....didnt really like it it was either WAY too stiff and raised up too high or the bags were completely deflated....not to mention it eventually develops leaks.

if anything i would reccomend helper spring bushings that coil up between the coils. keeps it almost stock height but doesnt drop as much with weight on the back..

i run towing springs on my passat....might experiment with the coil supports along with lowing the whole car...depends how often ill end up using my trailer

Radek · Mar 13, 2019

I'm trying to avoid air bags as they start leaking after some time, search doesn't show anything when typing in towing springs beside the bags

Strider17 · Mar 13, 2019

https://www.google.com/search?q=coi...Mx4DhAhXqmuAKHVjkDbAQBQgrKAA&biw=1280&bih=578

Radek · Mar 14, 2019

Strider17 said:
https://www.google.com/search?q=coi...Mx4DhAhXqmuAKHVjkDbAQBQgrKAA&biw=1280&bih=578

Thx a lot, was browsing their site and didn't notice they have springs as well, much appreciated

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Strider17 · Mar 14, 2019

Sumo spring helpers is what you want.

Radek · Mar 14, 2019

Strider17 said:
Sumo spring helpers is what you want.

Was told it's not available for tdi model passat

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Strider17 · Mar 14, 2019

thats bs...just measure the distance between the coil and order one thats suits the best...thats what i did

Radek · Mar 15, 2019

Strider17 said:
thats bs...just measure the distance between the coil and order one thats suits the best...thats what i did

Any difference in rear spring size between gas and tdi models ? Etrailer has sumo helpers for gas but not a diesel

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Radek · Mar 15, 2019

I mean they have Firestone brand not the sumo that supposedly fits only gas model

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Strider17 · Mar 15, 2019

all i know is tdi models are softer ride....best bet is to measure and compare....there is a chart somewhere on sumosrpings site...or call them

Williamkevin · Mar 16, 2019

I hate my suspension wallows all over the place. I am going to try the KONI Special ACTIVE units.

Radek · Mar 18, 2019

Would anybody have measurements of the springs (please see bottom of the attached link) , sumo says they'll try to find me what fits my car or maybe make a few sets for tdi models

https://www.supersprings.com/products/coil-sumosprings/

Strider17 · Mar 18, 2019

id like to also possibly run oem "sport" struts/shocks with passat CC spring and sumo springs on the back....i think it would stiffen up the ride, wont sag the back and lower the car a bit...but thats only if i find super cheap coils...otherwise just go with lowering springs

Bottoming out problem

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