Cowl Seam and water intrusion

Discussion in '40- & 55-Series Tech' started by AutaviaFJ40, Jun 13, 2018.

  1. AutaviaFJ40

    AutaviaFJ40

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    My cowl seam was caulked and painted with the vehicle in its previous life. It looks great, but now has some tiny cracks in the seams. Im getting water leaking into the front drivers footwell, which is dripping onto the fuse block and my front speaker.

    I believe the source is this seam...what is the best solution for tackling this short of completely removing the old caulking and repainting?

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  2. tls3601

    tls3601

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    Find matching touch up paint and use 3M Urethane Seam sealer, works excellent, just did on mine. It was a job I had been putting off. Find out how it works at next bath
     
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  3. AutaviaFJ40

    AutaviaFJ40

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    Put it right on top of existing seam?

    I was thinking about using this. thoughts?

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  4. tls3601

    tls3601

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    I scraped/removed what I could of the old, cleaned paint for any residue, used blue painters tape for margins. Waited to cure then painted touch-up style

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  5. tls3601

    tls3601

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    Have not used the fast and firm
     
  6. AutaviaFJ40

    AutaviaFJ40

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    Thanks, this is very helpful...didnt think about taping it off.
    Did you brush the touchup paint on?
     
  7. John McVicker

    John McVicker SILVER Star

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    Check your cowl drain tubes for leaks before doing any painting.

    Yes, your leak could be originating from the seams but it could also be from bad drain tubes. I sealed my seams up and it still leaked...it was the drain tubes.
     
  8. AutaviaFJ40

    AutaviaFJ40

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    Thanks, but mine is an 81...no drain tubes.
     
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  9. AutaviaFJ40

    AutaviaFJ40

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    I put a temp silicon sealer on the joint to water test it. If this stops the leak, I’m going to follow @tls3601 advise and reseal and paint

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  10. 82FJ40EVV

    82FJ40EVV

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    Silicon really messes with new paint..... don't take any shortcuts when cleaning it up / preparing for new paint.
     
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  11. cult45

    cult45 SILVER Star

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    Clear silicone is what I used, blended right in.
     
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  12. AutaviaFJ40

    AutaviaFJ40

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    I was actually pleasantly surprised how easy this was to apply and how nicely it flowed into the cracks...but I wonder how long it will last?
    I selected it because I assumed it would be easy to remove in one piece...but I may just see how long it lasts first. Assuming this solves the problem...water test this afternoon will tell more.
     
  13. cult45

    cult45 SILVER Star

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    If it's silicone then it will last. I recaulked my cowl seam over two years ago. Hasn't moved or leaked.
     
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  14. AutaviaFJ40

    AutaviaFJ40

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    What I used is just a standard window/door exterior Silicone caulk...its not an automotive seam sealer. Is that what you used?
     
  15. cult45

    cult45 SILVER Star

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    Yeah just the clear stuff you'd use in your bathroom.
     
  16. tls3601

    tls3601

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    @AutaviaFJ40 yes good old artists style brush. Will do a second coat next time I am up North where the 40 is
     
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  17. middlecalf

    middlecalf SILVER Star

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    Years ago there used to be a silicone that would flow, great for things like this where the sealant needs to flow into all of those deep and dark crevices. Anyone know if this is still available?
     
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  18. AutaviaFJ40

    AutaviaFJ40

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    Part 2
    The seam isn't the issue...its this mess

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  19. AutaviaFJ40

    AutaviaFJ40

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    I cleaned it all out...I need to prep and prime the bare metal spots before re sealing it.
    Dynatron Seam Sealer #550 or 3M Fast'n Firm Seam Sealer 08505?

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  20. S4Cruiser

    S4Cruiser SILVER Star

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    I'm a big fan of the Lord Fusor brands. Honestly though, most anything should work fine.
     
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