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Harry Ferguson Tractors Discussion Forum
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Engine assy // Head gasket sealant

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Bruce(OR)

01-13-2008 22:29:41




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Putting the TO-20 engine back together and the manual says to use a "commercial sealant" or cup grease if it is not available on both sides of the head gasket. Indian head gasket glue seems to come to mind for a sealant. Any other ideas?




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John (TR)

01-15-2008 19:50:40




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 Re: Engine assy // Head gasket sealant in reply to Bruce(OR), 01-13-2008 22:29:41  
I used the copper coat on an 8n I rebuilt 3 times. Don't want to go into details as its a long story but I used copper coat and she sealed right up and came apart fine but then it did not have a lot of hours between rebuilds 2 and 3.



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Lance J.

01-15-2008 13:53:40




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 Re: Engine assy // Head gasket sealant in reply to Bruce(OR), 01-13-2008 22:29:41  
Bruce-
Permatex produces an aerosol product called "hylomar" which is a flourocarbon based gasket sealant which works extremely well on headgaskets. Fel-Pro, in fact, puts it on nearly all of their head gaskets, as do many OEM"s. I have used the Permatex copper-cote also, and it works extremely well. What brand of a head gasket are you using? Some brands specifically advise against using any type of sealant on their gaskets.

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Bob (Aust)

01-14-2008 18:11:47




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 Re: Engine assy // Head gasket sealant in reply to Bruce(OR), 01-13-2008 22:29:41  
..... ... not to mention, the problems you may have getting the head off again!!! I've heard of tractors and cars hanging from a shed roof for days trying to break old style gasket cement seal!

[quote:9bfb92ecba]..... but to provide some lube so the gasket would creep and settle into place, and not get pinched or wrinkled. [/quote:9bfb92ecba]

That was what I was trying to say. You simply said it far better. :lol:
Bob in Oz!

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gshadel

01-14-2008 14:14:48




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 Re: Engine assy // Head gasket sealant in reply to Bruce(OR), 01-13-2008 22:29:41  
I had the same question when I rebuilt my TO a few years back, and was at a loss to understand what "cup grease" was, and how that would seal anything. An old timer told me cup grease was just thick grease. He also told me the grease was used on the head gasket not to seal it, but to provide some lube so the gasket would creep and settle into place, and not get pinched or wrinkled. That seemed to make sense to me.
A lot of guys say they install the gaskets dry. I like a little insurance myself, I used a head gasket sealant called "Copper Coat". It sprays on and is super easy to use, and apparently widely used by auto mechanics. Worked well for me. Your local NAPA or auto parts place should carry it. Indian Head... isn't that a shellac sealer? That wouldn't be one my short list for heads, not sure it would stand up to heat that well, & not sure how it stands-up to anti-freeze.

George

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GrampaJack

01-15-2008 10:05:47




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 Re: Engine assy // Head gasket sealant in reply to gshadel, 01-14-2008 14:14:48  
I used the same Copper Coat stuff from NAPA that George did. The local NAPA guy also rebuilds racing engines and swears by it. My biggest concern is in interpretation of the instructions. The can said to spray on liberally even letting one coat dry and applying another. This I did but I think I got carried away and put on way too much. Had a gooey mess. In the spring when I fire the old girl up I guess I will know. I have considered pulling it back off and trying again, might be easier than dealing with a blown gasket. One thing I know for sure is that I got good coverage. Jack

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Dan S (NY)

01-14-2008 09:05:35




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 Re: Engine assy // Head gasket sealant in reply to Bruce(OR), 01-13-2008 22:29:41  
When I did my TO20 7 years ago, I just used a very thin layer of grease on both sides of the gasket. Head and block where clean and smooth. Haven't had any trouble.

Dan



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Duner Wi

01-14-2008 06:02:35




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 Re: Engine assy // Head gasket sealant in reply to Bruce(OR), 01-13-2008 22:29:41  
I would consider is the new gasket made exactly like the gasket of 50 years ago with the same materials. New gasket may be new and improved and not need to be greased or sealed. Some have a coating on them from the factory.



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Bob (Aust)

01-14-2008 03:20:45




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 Re: Engine assy // Head gasket sealant in reply to Bruce(OR), 01-13-2008 22:29:41  
It is probably a matter of personal preference and you should follow the manual, but my preference is for ultra clean block and head faces (including if necessary, a very light, careful clean up with very fine grit, at least 600 or finer wet and dry paper), install the gasket "dry" with just the faintest hint of grease so I can center the gasket and correct head bolt tension, re tensioning the head and re adjusting valve clearances after 10 to 15 hours running.

Both my Ferguson TEA20 and Jaguar XKE head gaskets were installed "dry". I've never had a blown or leaking gasket problem - and I've never had to hang the tractor from the roof trying to break the head gasket cement!

Bob from Oz

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