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IdahoDoug
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Joined: June 12, 2010
Posts: 10355
Location: N. Idaho
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 Posted: Fri Jul 29, 2016 9:59 pm Post subject: Yellow head bolt sealant not hardening - problem? |
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So, the yellow sealant that comes in the engine gasket set from Reinz. It is not hardening after 2 days. I may be over reacting and perhaps it needs engine heat to cure and perhaps nobody's ever noticed this, but I habitually put a bead of sealants I use on the bench on a piece of scrap to see how they behave. I toss them when things work out. That sample is still exactly like it was when I squeezed it out - like toothpaste.
What say the faithful?
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1987 2WD Wolfsburg Vanagon Weekender "Mango", two fully locked 80 Series LandCruisers. 2017 Subaru Outback boxer. 1990 Audi 90 Quattro 20V with rear locking differential, 1990 burgundy parts Vanagon. 1984 Porsche 944, 1993 Toyota LandCruiser, 2002 BMW 325iX, 1982 Toyota Sunrader |
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Merian
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Joined: January 04, 2014
Posts: 5212
Location: Orygun
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| Posted: Fri Jul 29, 2016 10:05 pm Post subject: Re: Yellow head bolt sealant not hardening - problem? |
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is it anaerobic?
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IdahoDoug
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Joined: June 12, 2010
Posts: 10355
Location: N. Idaho
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| Posted: Fri Jul 29, 2016 10:19 pm Post subject: Re: Yellow head bolt sealant not hardening - problem? |
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Dunno, but I'm going anaerobic hyperventilating at the thought of pulling the heads off now that they're on. I'm ready to relax and finish the easy stuff up. Argh...
I've seen it referred to as a "non hardening" sealant in other spots, but this seems like it would washout.
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1987 2WD Wolfsburg Vanagon Weekender "Mango", two fully locked 80 Series LandCruisers. 2017 Subaru Outback boxer. 1990 Audi 90 Quattro 20V with rear locking differential, 1990 burgundy parts Vanagon. 1984 Porsche 944, 1993 Toyota LandCruiser, 2002 BMW 325iX, 1982 Toyota Sunrader |
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Merian
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Joined: January 04, 2014
Posts: 5212
Location: Orygun
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| Posted: Fri Jul 29, 2016 10:56 pm Post subject: Re: Yellow head bolt sealant not hardening - problem? |
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either check the spec. sheet or clamp 2 pieces of metal with it for a day then try to pull apart
or put them in the oven for a while, then try
or... check the date code on the stuff 
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DwarfVader
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Joined: July 28, 2015
Posts: 646
Location: Missoula, MT
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| Posted: Fri Jul 29, 2016 11:41 pm Post subject: Re: Yellow head bolt sealant not hardening - problem? |
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I'd for sure find out what sort of adhesive/sealant it is... If it's anarobic then it sitting on a sheet of paper isn't going to do beans. (Other than make you nervous.)
I don't have your answer... but I'll say this much... you can't be the first to have these thoughts. (Someone here probably was though.)
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djkeev
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Joined: September 30, 2007
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Location: Reading Pennsylvania
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ftp2leta
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the joker
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Joined: October 12, 2006
Posts: 1287
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| Posted: Sat Jul 30, 2016 7:15 am Post subject: Re: Yellow head bolt sealant not hardening - problem? |
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my rebuild was 5 years old and the yellow sealant is still clay like on the outside nuts but no leaks hope that helps ease your mind  |
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AtlasShrugged
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Joined: October 30, 2008
Posts: 1605
Location: Decatur, Ga. USA
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| Posted: Sat Jul 30, 2016 7:26 am Post subject: Re: Yellow head bolt sealant not hardening - problem? |
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The yellow sealant always stays like soft clay..until it is pressed between two metal parts. It works fine for our Vanagon head nuts..if the head surface and nut face was clean when torqued down the nuts.
The "right stuff" on the rubber gaskets for sure. |
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IdahoDoug
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Joined: June 12, 2010
Posts: 10355
Location: N. Idaho
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| Posted: Sat Jul 30, 2016 11:22 pm Post subject: Re: Yellow head bolt sealant not hardening - problem? |
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OK. Probably fine then. I cleaned the head nut clamp surface on the head with a red 3M pad and brake cleaner, then same on the nut's face after cleaning it completely with brake cleaner. So, I think we are good to go on. Thanks very much for the input.
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1987 2WD Wolfsburg Vanagon Weekender "Mango", two fully locked 80 Series LandCruisers. 2017 Subaru Outback boxer. 1990 Audi 90 Quattro 20V with rear locking differential, 1990 burgundy parts Vanagon. 1984 Porsche 944, 1993 Toyota LandCruiser, 2002 BMW 325iX, 1982 Toyota Sunrader |
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