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Thread: Pontoon Alignment Question

  1. #1
    Senior Member lewma's Avatar
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    Pontoon Alignment Question

    Hello all

    I'm returning back to the hood again and dialing it in more for fitment.

    I have a question with how my pontoons are sitting. From the side, if you start at the back of the door then follow the bottom line along the door then keep going forward to the top of the pontoon, the pontoon seems to be curved upward. I would have expected the line of the bottom of the door to keep going forward and to continue into the pontoon in a straight line. I've attached a couple of pictures of both my passenger and driver side

    Any advice would be greatly appreciated
    mark
    20230205_121210.jpg20230205_121254.jpg
    Build 1: Mk4 Complete Kit #9312 Ordered 1/27/18, Delivered 3/24/18, CA SB100 Registered 9/11/19 - Gen 2 Coyote TKO600, IRS, Power Steering, Wilwood Brakes, 17" Halibrand.
    Build 2: Gen3 Coupe Complete Kit #309 Ordered 1/25/21, Delivered 6/9/21 - BluePrint GM 427 LS T56, IRS, AC, Power Steering. Album Here

  2. #2
    Senior Member lewma's Avatar
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    Here's another pic of the passenger side looking forward ( ignore the door alignment )

    20230205_122927.jpg
    Build 1: Mk4 Complete Kit #9312 Ordered 1/27/18, Delivered 3/24/18, CA SB100 Registered 9/11/19 - Gen 2 Coyote TKO600, IRS, Power Steering, Wilwood Brakes, 17" Halibrand.
    Build 2: Gen3 Coupe Complete Kit #309 Ordered 1/25/21, Delivered 6/9/21 - BluePrint GM 427 LS T56, IRS, AC, Power Steering. Album Here

  3. #3
    East Coast Speed Machines Erik W. Treves's Avatar
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    You need to completely install the hood hinge before you attempt getting the body and the hood to line up.

    I would then start by placing the pass side of the body as far forward and right up against the door sill bar. The driver's side will need to be slid aft about 1/4 inch and up 1/4 inch - use this to start. Additionally the splash guards can be used to set the position of the pontoon.

    Make sure you are using the rubber bumpers on the pontoon when you do the fitment.

    You may need to lower the nose some but it's hard to see from your picture- do you have your latches installed - you will need to have those in there as well.
    FFR 1879, Blown DSS 306,REDLINE management, VeryCoolParts Tuned 460RWHP

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    Senior Member lewma's Avatar
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    Hello Erik

    My question is regarding how the body was formed and how the pontoons seem to be formed and pointing up in relation to the bottom edge of the doors. From the side, those lines look like a banana.

    My 3rd picture shows it best. Just wondering if this is 'normal'

    thanks
    mark
    Build 1: Mk4 Complete Kit #9312 Ordered 1/27/18, Delivered 3/24/18, CA SB100 Registered 9/11/19 - Gen 2 Coyote TKO600, IRS, Power Steering, Wilwood Brakes, 17" Halibrand.
    Build 2: Gen3 Coupe Complete Kit #309 Ordered 1/25/21, Delivered 6/9/21 - BluePrint GM 427 LS T56, IRS, AC, Power Steering. Album Here

  5. #5
    Not a waxer Jeff Kleiner's Avatar
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    Remember that the hood dictates everything and in the end you’ll be adjusting to that. With that said though, no the line is not parallel to the bottom of the doors and does run uphill towards the front. You can kind of see it here:





    One thing I’ve learned over the years is that sometimes it’s best to just not get too close to these cars with a tape measure or straightedge

    Jeff


    2B6F59C2-21F9-487F-83E7-EA32CBE4B8B8.jpg

    8AC2BCAE-36D8-4B5F-8570-576B4051E216.jpg

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    Senior Member edwardb's Avatar
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    In addition to the hints from Jeff and Erik, the pontoons are free to float around and impossible to line up if unsupported. I found it really helped to make the front lower splash guards part of the process. They rivet to the engine surround sheet metal and you can use the lower part that goes to the pontoons to align and eventually lock them down.

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    Build 5: 35 Hot Rod Truck #138. LS3 and 4L65E auto. Rcvd 01/05/2021. Legal 04/20/2023. Build Thread. Sold 11/9/2023.

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    Senior Member lewma's Avatar
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    All, I'm still having alignment issues with the hood and pontoon and was wondering if there are any other tricks to try:

    - The driver bottom side of the hood at the wheel arch will not sit low enough on the pontoon.
    - The body is fairly locked in by the door sills. Not much movement can be done at all.
    - The hood is as low as it will go. Its resting on the radiator shroud and there's zero additional threading on the hinge to lower it any more.

    Any suggestions would be greatly appreciated!

    20230219_104428.jpg
    Build 1: Mk4 Complete Kit #9312 Ordered 1/27/18, Delivered 3/24/18, CA SB100 Registered 9/11/19 - Gen 2 Coyote TKO600, IRS, Power Steering, Wilwood Brakes, 17" Halibrand.
    Build 2: Gen3 Coupe Complete Kit #309 Ordered 1/25/21, Delivered 6/9/21 - BluePrint GM 427 LS T56, IRS, AC, Power Steering. Album Here

  8. #8
    Senior Member edwardb's Avatar
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    Did you try locking them with the splash guards like I posted previously? I found it was possible to twist them around some and even clean up the gaps. Yours looks like it's twisted some. Another "landmark" that's critical to how things line up (and how it looks IMO) is that the front of the pontoon flows into the wheel opening in the hood. From the side, it should look continuous. I've seen builds where there was a mismatch and (for me anyway) kind of stands out.
    Build 1: Mk3 Roadster #5125. Sold 11/08/2014. Build 2: Mk4 Roadster #7750. Sold 04/10/2017. Build Thread
    Build 3: Mk4 Roadster 20th Anniversary #8674. Sold 09/07/2020. Build Thread and Video. Build 4: Gen 3 Type 65 Coupe #59. Gen 3 Coyote. Legal 03/04/2020. Build Thread and Video
    Build 5: 35 Hot Rod Truck #138. LS3 and 4L65E auto. Rcvd 01/05/2021. Legal 04/20/2023. Build Thread. Sold 11/9/2023.

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  10. #9

    Steve >> aka: GoDadGo
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    This is how the Manheim Make-A-Wish Folks handled the bodywork which video #2 includes the pontoons.

    Video #1
    https://youtu.be/key003RaJsc

    Video #2
    https://youtu.be/8QcQvfM1IM4

    Video #3
    https://youtu.be/JsYNQZsvBH4

    Here is how the car looks today:
    https://youtu.be/qhzF_IXXuhc

    Maybe this helps, maybe it doesn't; however, I thought you might want to see them.

    Good Luck & I'm Sure Your Car Will Turn Out Very Well!

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  12. #10
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    I am finishing up the alignment stage on my build as well. I found that the rear body height measurement of 10.25" was causing me a lot of grief. I gave up on it and let the body sit naturally on the chassis, which put it at around 9.25". My pontoon alignment was way better after that. Paul is right though, you have to twist them some to get everything right.

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  14. #11
    Senior Member lewma's Avatar
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    Quote Originally Posted by GoDadGo View Post
    This is how the Manheim Make-A-Wish Folks handled the bodywork which video #2 includes the pontoons.

    Video #1
    https://youtu.be/key003RaJsc

    Video #2
    https://youtu.be/8QcQvfM1IM4

    Video #3
    https://youtu.be/JsYNQZsvBH4

    Here is how the car looks today:
    https://youtu.be/qhzF_IXXuhc

    Maybe this helps, maybe it doesn't; however, I thought you might want to see them.

    Good Luck & I'm Sure Your Car Will Turn Out Very Well!
    Great set of videos!! Thanks for posting
    Build 1: Mk4 Complete Kit #9312 Ordered 1/27/18, Delivered 3/24/18, CA SB100 Registered 9/11/19 - Gen 2 Coyote TKO600, IRS, Power Steering, Wilwood Brakes, 17" Halibrand.
    Build 2: Gen3 Coupe Complete Kit #309 Ordered 1/25/21, Delivered 6/9/21 - BluePrint GM 427 LS T56, IRS, AC, Power Steering. Album Here

  15. #12
    East Coast Speed Machines Erik W. Treves's Avatar
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    I wouldn't be afraid to twist that pontoon at all - the shell will bend and take a set when not supported - fiberglass never really stops moving... make sure you are using those rubber bumpers along the rain gutter and directly under the latch when you are doing the mockup.
    FFR 1879, Blown DSS 306,REDLINE management, VeryCoolParts Tuned 460RWHP

    FFR 818S, The Flash, Chassis #5, 2.0L, LSD, Electromotive TEC-S, VCP Tuned, 278RWHP 265 RWTQ

    FFR 6651, Green Lantern, 408W Crate, Hellion 66mm Turbo, JGS Waste gate / Blowoff valve, Tec-GT management, VCP Tuned, 575 RWHP, 690 RWTQ

    FFR 8335, Black Mamba, 289 FIA CSX 2001 tribute car, 347, 48 IDA webers, VCP Tuned, 311 RWHP 386 RWTQ, 3-link, Trigo's

    FFR 0004, Gen 3 , Hawk Coupe, Coyote twin turbo, 683 RWHP 559 RWTQ, IRS, VCP Tuned. "not too shabby"

    US ARMY Maintenance Test Pilot (CW4 Retired)

  16. #13
    Senior Member lewma's Avatar
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    Thanks all, I was planning on a full day today. For some reason its raining in Southern California so that's stopped work. I have little free space so much of it is done on the driveway.
    Build 1: Mk4 Complete Kit #9312 Ordered 1/27/18, Delivered 3/24/18, CA SB100 Registered 9/11/19 - Gen 2 Coyote TKO600, IRS, Power Steering, Wilwood Brakes, 17" Halibrand.
    Build 2: Gen3 Coupe Complete Kit #309 Ordered 1/25/21, Delivered 6/9/21 - BluePrint GM 427 LS T56, IRS, AC, Power Steering. Album Here

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