[AT] Permatex Ultra Black

[Doug Tallman]

Mike, I would recommend a Permatex product called "the right stuff". It 
is an anerobic rubber and is far superior to silicone. It is available 
in caulk gun tubes or a spray can lke cheese whiz. I use the caulk gun 
tubes at the shop. A little pricier but it works good. I can't remember 
the last time I bought silicone at the shop since starting to use this.  
Doug T



On 4/20/2020 12:01 AM, Mike M wrote:
> This could be old tractor related, so I don't feel bad. I have a Scag 
> zero turn with a Kohler 7000 series engine. After a whopping 200 hrs 
> the valve cover gaskets started to leak. There is an upgrade kit, as 
> this is a known issue, that is composite and uses O-rings vs stamped 
> steel and a gasket. I'm going to try some Permatex Ultra Black RTV on 
> them as the upgraded versions cost about 100 bucks all told. I've read 
> where I should tighten the screws loosely just enough to make the 
> gasket maker start to ooze out, then wait an hour and torque them 
> down, in this case 44-66 in/lbs. According to Permatex's site it says 
> to tighten them right down.
>
> *"Apply a continuous and even bead of silicone to one surface, 
> surrounding all bolt holes. Remove excess with knife at once. Assemble 
> parts immediately. Do not squeeze out silicone by over tightening 
> bolts. Re-torque will not be necessary."**
> *
> Says nothing about torquing them in the first place, just not to over 
> tighten, kind of ambiguous. Has anyone used this stuff, and if so what 
> method did you use?
>
> Thanks,
> Mike M
>
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