DIY head surfacing after gasket failure - Snowblower Forum : Snow Blower Forums
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post #1 of 14 Old 10-11-2015, 01:55 PM Thread Starter
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DIY head surfacing after gasket failure

I came across this article by Matt Gonitzke on how to surface a head using a square of glass and sandpaper. Maybe it's old news to a lot of you but I thought it worth sharing and seeing if maybe it should be a "sticky".

It seems like a no brainier as I always surfaced automotive heads when doing a head gasket job but never thought about doing it on a small engine.
I'm sure sending it out to have it surfaced at a shop is a more perfect way to get it flat but this seemed like a great way to get very close and sure beats just tossing in a new gasket and hoping for the best.
I like that's it easy and fairly cheap too

http://www.mgonitzke.net/cubcadet/tools/headgasket.pdf

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post #2 of 14 Old 10-11-2015, 02:52 PM
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It is common to do that on carburetor mating surfaces. At work we have a block of glass of about 8x8 inches, double glass and a double sided adhesive film in between that we use with sandpaper for that purpose.
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post #3 of 14 Old 10-12-2015, 12:12 PM
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That's a fantastic write-up, Frog. Thanks for passing it along.
It's quite coincidental timing of you posting it, too, because I'm actually doing that same repair on my pop's lawn tractor...replacing the head gasket.
Such a simple method for effective results

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post #4 of 14 Old 10-13-2015, 09:20 PM
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I've used pieces of granite tile I have left over from my bathroom floor.




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post #5 of 14 Old 02-08-2016, 07:44 AM
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Great write up Froggy. This procedure also applies for the Kids 2 stroke Mopeds and small dirt bikes!
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post #6 of 14 Old 02-11-2016, 02:04 AM
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I've used this method for block decks on Subaru's with great success. Over 350K miles on one of the engines
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post #7 of 14 Old 02-11-2016, 09:37 PM
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think I saw the same technique in an old kohler repair manual - caution was to use the right grit paper so you don't take too much off - high number wet/dry paper
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post #8 of 14 Old 02-11-2016, 09:45 PM
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posted before I read the article - use caution with oven cleaner - most cleaner cans recommend not using on aluminum as it can dissolve Al - usually contains lye
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post #9 of 14 Old 01-01-2017, 10:18 PM
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I have seen some similar in a motorcycle forum but instead of sandpaper lapping compound was used.
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post #10 of 14 Old 01-02-2017, 07:26 PM
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For those who have done something like this before, about how much time did it take to wet sand the head in the article - 20 minutes, 30 minutes, an hour? Even more?

Also, as far as the directions stating to turn this thing periodically during the process, what is the best method - turning from say 6:00 to 9:00 then to 12:00 etc. in some type of specific, circular sequence?
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