Question about 1999 Cadillac DeVille

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Does that dura-seal head gasket repair stuff REALLY work?

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  • Don OToole
    Don OToole Dec 16, 2015

    I used Dura seal in my 2002 Subaru Impreza it didn't work they sent me a booster treatment which I had to pay for and that didn't work. If you want your money back you have to get a mechanic estimate saying the head gasket needs to be replaced. The cost to get the estimate is almost as much as the Dura Seal. Let the Buyer Beware. Oh yeah the xpert. comsite with all the rave reviews its a scam there is no such site it a link to their own site.

  • Tonie Harris
    Tonie Harris Dec 13, 2016

    I'm sorry to hear of your bad experience but I ordered the Dura Seal and when I told them it was better but I could see my temps were still a little high for the fall temp and wasn't sure how it would do in the summer and by then it would be too late to get my free second application. So with no questions asked they sent me another kit. 3 months later so far so good. I drive this car every day. 99 Cadillac deville 240,000miles

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I had a blow head gasket on my BMW 6 cyl. and it was blowing white smoke and losing alot of coolant. After doing alot of research I found that all the other brands like blue devil, steel seal, KW and bars all use water-glass. The only company that does NOT USE WATER-GLASS is Dura-Seal. If you have aluminum heads it's very important to use a sealer that can flex with your engine's aluminum heads. The DuraSeal actually stays flexible! So I tried it and it stopped the smoke and overheating. No more coolant loss either. It's been running fine for over a year now. I would reccomend Dura Seal head gasket sealer to everyone... Great product! Also the tech department guys really know what they are talking about...

Posted on Nov 09, 2012

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  • marklopez
    marklopez Apr 29, 2014

    About 3 years ago Iused the dura seal head sealer on my daughters subaru and its still holding! She uses it everyday to go back and fourth to college. It was overheating real bad and pushing water right out of the overflow tank. I'd recommend duraseal to everyone...

  • Priyajeet Sinh Jadeja
    Priyajeet Sinh Jadeja Jan 16, 2015

    i am having same problem with checy v6 but i dont know how to use it. is anyone can guide me??

  • Tonie Harris
    Tonie Harris Dec 13, 2016

    It's some really good stuff.

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Dura Seal works 240,000 99 Cadillac deville

Posted on Dec 13, 2016

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Do not use Duraseal if you have a turbo diesel engine. I tried it on my 2008 Ford F350 6.4 diesel as a last resort after replacing my rad, hoses and other misc. cooling system items. System was air tight after doing the work as I checked with Airlift 5000 and held 25 psi for 2 minutes plus. Oil temp and coolant temps were within 2 to 7 degrees of each other before doing the Duraseal fix attempt. Did it on the weekend of 12-27-2014. After fix, drove truck at least 75 miles and coolant to oil temps deltas were 30 plus degrees without a load, more with a small load on. Local Ford mechanic encountered another person with same problem after attempting to use product. It didn't fix the head gasket problem either. They want you to try another attempt for free but why would you make the problem any worse. They won't refund your money after this either. There is no bending with this company. They claim to formulate for individual engines, so they should be willing to refund the money if this sort of thing happens. The tech was trying to say there was something wrong with the cooler before hand, but that's impossible with the minor temp difference. I even used there flush before doing their procedure. It would be good business practice to refund my money under these circumstances since it didn't work and it clogged a perfectly functioning oil cooler. DO NOT BUY DURASEAL!!!!!!!!! They are a no compromise company! They are unwilling to satisfy when the product doesn't work and does harm to components!

Posted on Dec 30, 2014

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I've used a few head gasket sealers in the past, most didn't work and a few like steel seal and thermagasket actually clogged my radiator. The best one I've used has been the dura seal head gasket sealer. I used it on 2 cars and a farm tractor with good results. The tractor actually didn't get a full seal the first time, it got better but it still missed at start-up. I called the duraseal people back and they sent me out a stronger application for free. They did charge me shipping and handling, wasn't to happy about that! But the second application did the trick and totally stopped the miss-fire. Good stuff... I'd recommend dura seal to you.

Posted on Apr 29, 2014

  • Tonie Harris
    Tonie Harris Dec 13, 2016

    Same here about that shipping

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5 Suggested Answers

fastboyz
  • 674 Answers

SOURCE: head gasket blown

there are many was a head gasket can blow . sometimes they just leak to the outside sometimes they leak to the coolant and then it blows out your antifreeze. if you have a blown head gasket you will see it when you pull the head. and yes you should hace the head checked at a machine shop and install with a new head set never reuse a gasket .
later paul

Posted on Sep 15, 2008

  • 9 Answers

SOURCE: Im going to try steel seal

man...just pull your head and replace the gasket...dont take the chance of ruining your motor by trying a quick fix that may or may not work....its about an hour of time ...

Posted on Feb 09, 2009

jrw4u
  • 62 Answers

SOURCE: To repair a head gasket leak of water into the combustion chamber

exactly what scott said its a temporary fix is all any brands you use will be the same the best i have heard to use is liquid glass

Posted on Apr 30, 2009

  • 638 Answers

SOURCE: overheating 1999 northstar 32valve v8.

i would have the head gaskets replaced, this way , you know that there won't be any more leaks, and sometimes , using the sealer, might not work as good as you need it too.

Posted on Apr 26, 2011

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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1 Answer

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For the gasket sealant, I would steer clear. Read some comments here:
http://legacygt.com/forums/showthread.php/has-anyone-ever-used-dura-seal-head-gasket-engine-block-169050.html?s=d69e27b021bb07cd898d18f7bd2e751c&

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