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My 1st overhaul! What gaskets get sealer and whic

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Randy G

09-01-2003 15:50:17




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I am overhauling my 1st 2 cylinder, a JD 1955 50 w/powersteering and tach. The service manual say little on which gaskets to re-install with sealant or not. Should the bearing housing on the govenor get some? The fan shaft gasket? Would someone please give me a list of which do and do not! I'm sure all cooling system gaskets would but have no resource but here to save me from a mistake discovered only after completion. Please help!!!! Thanks, Randy G

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Clooney

09-02-2003 03:57:18




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 Re: My 1st overhaul! What gaskets get sealer and in reply to Randy G, 09-01-2003 15:50:17  
Randy, as Lee said a sealer should be used on all gaskets. The type of sealer depends on the location, & what it's sealing, & the temperature range it works at.
~Originally Deere didn't use sealer on most of the gasket areas [they also had a lot of seeps].
~Unlike Lee I'm not a big fan of silicone type sealer & don't use it on any of my restorations. That stuff tends to leak at a future time & if pressure is sealed with the silicone it tends to let the gasket migrate under pressure.
~Basically I use #3 Permatex on most removable gaskets like the head gasket, rocker cover gasket & distributor gasket. On most other permanent gaskets I use Loc-Tite 518 [or 515] gasket reinforcement. That stuff adds body to the gaskets, seals them, keeps them from migrating & can even be used without a gasket in most areas as some of the gaskets are also shims & due to wear you might have to remove all the gaskets to get the clearances correct.
~On all the threaded bolts that go into either a water area or oil area I also use either the 518 or Loc-Tite PST pipe sealer. On all the threaded fittings & plugs I use the Loc-Tite PST.
~One of the most important things I have found is to use brake clean or lacquer thinner to clean all sides of the gasket flange surfaces before using any sealer. If there is any oil or grease on the gasket surface the sealer won�t work worth a hoot.
~It seems everybody is a little different on the sealer they use & most use what works for them. Just look under all the older restorations you see & when you find one that doesn�t have ANY oil seeps ask that person what they use�..

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Lee

09-02-2003 03:24:56




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 Re: My 1st overhaul! What gaskets get sealer and in reply to Randy G, 09-01-2003 15:50:17  
Some kind of sealer should be used on all gaskets as a rule of thumb. But a lot depends on the sealer you want to use too. I use silicone RTV for everything except gasoline exposed gaskets and I like it very much. I moved away from Permatex back in the days when the 'Perm' in the name meant permanent (as in glue), but others like it today now that it is soft, gooey and nasty to work with. At least with silicone, one stands a very good chance on re-using the gasket if one has to go into it a second time, which is why I like and use it so much.

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