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OEM Tonneau cover causing Bed rail Caps/trim to ripple

Discussion in '3rd Gen Tundras (2014+)' started by OR18TRD, Nov 13, 2018.

  1. Nov 13, 2018 at 11:28 PM
    #1
    OR18TRD

    OR18TRD [OP] Pândâ Crëw

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    Suspension: front- Bilsein 6112 set at 1.9”; Rear- bilstein 5160 with maxtrac 1” shackel. Wheels: Method MR308 roost wheels 18x9” +18 offset. Tires: 275/70/18 Goodyear wrangler DuraTrac’s Removed front mudflaps and moved front wheel well liner forward. Bakflip MX4 Tonneau cover Line-x premium bed liner aFe CAI Rear differential breather moved behind taillight Debadged Windows tinted 20% ESP locking long box rear seat storage OEM all weather mats
    I’ve got a 2018 CM with the OEM tonneau cover and noticed that the plastic bed rail caps are starting to ripple or become wavy from the cover. When I was look at Tundras I saw a 2014 and a 2016 that had the OEM tonneau covers and they were bad. The 2016 worse it looked like ~~ from the cab half way down the bed rail cap.
    Has anyone else noticed this?
    I’m thinking it’s from being tightened to much or the caps are that cheap and thin they can’t support the weight of the OEM cover. Either way I don’t want them to be waved out permanently. If this is an issue with these covers and someone has a fix or knows what’s up let me know.
    Thanks.
     
  2. Nov 14, 2018 at 12:09 AM
    #2
    Sunnier

    Sunnier Marty McFly's Fan Club President (& Stunt Double!)

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    If I get a winch on my 2WD, can I overland with the BASTRDs and SGU?!
    I don't have one (but borrowed another similar tonneau cover from a neighbor for a week-long road trip, so I had opportunity to check out possible limitations). I think wind works its way into the bed at the front, then batters the interior of the cover from underneath. At freeway speed, wind that gets in will always get out... and the paths of least resistance are the gaps between the tailgate and bedsides at the back, and the top rails. IMO, there's not gonna be much you can do to better secure a rest-on-top style tonneau cover. You could try securing the cover a bit closer to the cab (limiting wind getting in by that route) but my close inspection caused me to notice several small openings in the bed that let wind in. If I ever buy one to leave on, I'll choose a cover that sits in a rail below the top of the bed sides.

    Don't mean to be a downer. I hope someone else chimes in with a solution to improve your situation.
     
    OR18TRD [OP] likes this.
  3. Nov 14, 2018 at 12:55 AM
    #3
    OR18TRD

    OR18TRD [OP] Pândâ Crëw

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    Suspension: front- Bilsein 6112 set at 1.9”; Rear- bilstein 5160 with maxtrac 1” shackel. Wheels: Method MR308 roost wheels 18x9” +18 offset. Tires: 275/70/18 Goodyear wrangler DuraTrac’s Removed front mudflaps and moved front wheel well liner forward. Bakflip MX4 Tonneau cover Line-x premium bed liner aFe CAI Rear differential breather moved behind taillight Debadged Windows tinted 20% ESP locking long box rear seat storage OEM all weather mats
    The Tonneau cover itself is made well. It’s the top of the bed rail caps or bed rail covers that are rippling under the weight of the OEM tonneau cover. This thinner plastic bed rail cap (yellow arrow) is being caused to warp/ripple/wave by the weight of the cover sitting on top of it. Or ??? That’s what I’m trying to figure out. What’s causing it to warp/wave/ripple? 9410C6BF-BF67-48E0-8D45-CEB4495AA1B6.jpg
    This is not my truck^ just a picture to show what part I’m talking about. I will try to get pictures of it.
     
  4. Nov 14, 2018 at 1:32 AM
    #4
    Sunnier

    Sunnier Marty McFly's Fan Club President (& Stunt Double!)

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    If I get a winch on my 2WD, can I overland with the BASTRDs and SGU?!
    @OR18TRD Yeah. My suggestion remains the same: it is not the weight of the cover, but stress from the constant battering of wind. The diamondback covers weigh a ton, but seal better at these covered bed rails and, to my knowledge, aren't associated with the damage you're describing.

    Alternately, really cheaply made tonneau covers (or old ones), the wind wears down the adhesive that attaches the rubber strips that are supposed to "seal" the cover to the top of the bed side when closed... so the seals come undone and flap. Sounds like, your cover is well made, so the wind has not yet dislodged that adhesive but us pushing out under the seals along the top of the bedsides, and this pattern of air flow is causing the plastic bedside tops to ripple. But I don't think it's because the plastic tops of the bedsides are inferior; I think the tonneau covers--some more than most-- aren't designed to resist this specific condition they're regularly exposed to.
     
    Last edited: Nov 14, 2018
  5. Nov 14, 2018 at 3:46 AM
    #5
    LT75

    LT75 New Member

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    Icon 3.5/3 lift, 20” KMC XD wheels on 285/65/20’s.
    I’ve noticed it towards the ends by the gate and window
     
    OR18TRD [OP] likes this.
  6. Nov 14, 2018 at 6:12 AM
    #6
    equin

    equin Texarican Tundra

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    TRD Rear Anti-sway bar, TRD Pro skid plate, Bedrug bed mat, Icon Rebounds 285/75/17 Cooper Discoverer XLTs, Bilstein 6112s/5160s, Diamondback SE
    Interested in seeing photos of the warped, rippled bed caps.
     
    OR18TRD [OP] likes this.
  7. Nov 14, 2018 at 6:23 AM
    #7
    Blueknights75

    Blueknights75 WHITE is the FASTEST color!!!!!

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    Rugged 2 tri fold tonneau cover, spray in bed liner, bed extender, window tint, color matched side mirrors, color matched door handles, TRD Pro center caps, TRD Pro shift knob, tailgate keyfob actuator, ESP under seat storage unit mod, blacked out emblems, Toyota OEM black exhaust tip...more to come
    Having same issue. It appears to be from the clamps used to hold the tonneau cover on.
     
    equin and OR18TRD [OP] like this.
  8. Nov 14, 2018 at 12:06 PM
    #8
    OR18TRD

    OR18TRD [OP] Pândâ Crëw

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    Suspension: front- Bilsein 6112 set at 1.9”; Rear- bilstein 5160 with maxtrac 1” shackel. Wheels: Method MR308 roost wheels 18x9” +18 offset. Tires: 275/70/18 Goodyear wrangler DuraTrac’s Removed front mudflaps and moved front wheel well liner forward. Bakflip MX4 Tonneau cover Line-x premium bed liner aFe CAI Rear differential breather moved behind taillight Debadged Windows tinted 20% ESP locking long box rear seat storage OEM all weather mats
    That’s what I was wondering if it was the weight of the cover or the attachment points being to tight. I’ll take pictures when I get my truck back. I’m having 6112/5160’s put on today. :dancingbacon:
     
    Blueknights75 likes this.
  9. Nov 14, 2018 at 12:49 PM
    #9
    Blueknights75

    Blueknights75 WHITE is the FASTEST color!!!!!

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    Rugged 2 tri fold tonneau cover, spray in bed liner, bed extender, window tint, color matched side mirrors, color matched door handles, TRD Pro center caps, TRD Pro shift knob, tailgate keyfob actuator, ESP under seat storage unit mod, blacked out emblems, Toyota OEM black exhaust tip...more to come
    :jellydance:
     
    OR18TRD [OP] likes this.
  10. Nov 14, 2018 at 5:49 PM
    #10
    LT75

    LT75 New Member

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    Icon 3.5/3 lift, 20” KMC XD wheels on 285/65/20’s.
    I took this picture at 5am today so sorry if it’s dark. You can see the ripple right where the cover ends.

     
    OR18TRD [OP] and equin like this.
  11. Nov 14, 2018 at 6:16 PM
    #11
    equin

    equin Texarican Tundra

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    Thanks for the picture. Is there a clamp right where it dimples?
     
    OR18TRD [OP] likes this.
  12. Nov 14, 2018 at 6:18 PM
    #12
    Blueknights75

    Blueknights75 WHITE is the FASTEST color!!!!!

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    Rugged 2 tri fold tonneau cover, spray in bed liner, bed extender, window tint, color matched side mirrors, color matched door handles, TRD Pro center caps, TRD Pro shift knob, tailgate keyfob actuator, ESP under seat storage unit mod, blacked out emblems, Toyota OEM black exhaust tip...more to come
    My ripples are along to outer edges of the bed rail. Will take a picture tomorrow. I also noticed that on the inside of the bed the inner bed rails are flexing a bit where the clamps secure the cover...
     
    OR18TRD [OP] likes this.
  13. Nov 14, 2018 at 7:19 PM
    #13
    OR18TRD

    OR18TRD [OP] Pândâ Crëw

    Joined:
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    Vehicle:
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    Suspension: front- Bilsein 6112 set at 1.9”; Rear- bilstein 5160 with maxtrac 1” shackel. Wheels: Method MR308 roost wheels 18x9” +18 offset. Tires: 275/70/18 Goodyear wrangler DuraTrac’s Removed front mudflaps and moved front wheel well liner forward. Bakflip MX4 Tonneau cover Line-x premium bed liner aFe CAI Rear differential breather moved behind taillight Debadged Windows tinted 20% ESP locking long box rear seat storage OEM all weather mats
    I haven’t got my truck back or I would have taken a picture :(
     
  14. Nov 15, 2018 at 8:42 AM
    #14
    equin

    equin Texarican Tundra

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    TRD Rear Anti-sway bar, TRD Pro skid plate, Bedrug bed mat, Icon Rebounds 285/75/17 Cooper Discoverer XLTs, Bilstein 6112s/5160s, Diamondback SE
    Forgot to mention that in the thread linked below, we also discussed bed cap issues with respect to leaking diamondback covers. The two solutions proposed were to get stronger, thicker aftermarket bed caps or put shims underneath the factory bed cap. Not sure if or how those ideas would work but thought I'd bring it up just in case.

    Here's the thread:

    https://www.tundras.com/threads/leaking-diamondback.34147/
     
  15. Apr 14, 2019 at 5:37 PM
    #15
    Northern Exposure

    Northern Exposure New Member

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    3.5 inch lift, Fuel Vapors, nitto ridge grapplers, dual exhaust, tonneau cover, AFE intake, all LED lights.
    KIMG0149.jpg
    You mean like this??? Truck is 7 months old.. I'm pissed!! Just noticed today and wondered if anyone else had this issue.
     
  16. Apr 14, 2019 at 6:28 PM
    #16
    OR18TRD

    OR18TRD [OP] Pândâ Crëw

    Joined:
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    Gender:
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    Vehicle:
    2018 Panda Crewmax
    Suspension: front- Bilsein 6112 set at 1.9”; Rear- bilstein 5160 with maxtrac 1” shackel. Wheels: Method MR308 roost wheels 18x9” +18 offset. Tires: 275/70/18 Goodyear wrangler DuraTrac’s Removed front mudflaps and moved front wheel well liner forward. Bakflip MX4 Tonneau cover Line-x premium bed liner aFe CAI Rear differential breather moved behind taillight Debadged Windows tinted 20% ESP locking long box rear seat storage OEM all weather mats
    Yes like that.
    The OEM Tonneau cover was causing mine to start rippling like that. I took it off and put a Bakflip MX4 on. The bed caps are fine now no more rippling.
     

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