 lapping material for cutting cylinders into heads, where do i get some? |
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| shaggy |
 Dec 6 2006, 03:01 PM
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#1
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mechanic/welder/fabricator  Group: Members Posts: 702 Joined: 26-September 05 From: Gilbert, AZ Member No.: 4,869 Region Association: None  |
i need the lapping material for my t4 engine build so that i can run without head gaskets.
i have checked on the Type IV Store but wasnt able to find any. anyone know where i can get some? thanks -jim |
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| Cap'n Krusty |
Dec 6 2006, 03:11 PM
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#2
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
It's called "valve grinding compound", and it's sold at REAL auto parts stores.
That said, whatever made you think it's necessary? Something somebody said on the internet? Wanna buy a nice bridge in NYC? Your machinist did a great job of setting the heads up in his mill and surfacing them to within an RCH of perfection, and you wanna introduce the precision of spinning a cylinder you're holding in your highly precise hands? When will this myth finally die? You DID have the heads surfaced by a REAL machinist, right? One with some experience at doing this? 'Cause if you didn't, we're wasting our time here ............ The Cap'n |
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| Matt Romanowski |
Dec 6 2006, 04:03 PM
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#3
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Senior Member Group: Members Posts: 878 Joined: 4-January 04 From: Manchester, NH Member No.: 1,507 |
Wow, Cap'n - You don't believe everything you read on the internet?
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| BenNC |
Dec 6 2006, 04:06 PM
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#4
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Member Group: Members Posts: 140 Joined: 7-February 03 From: Cary, NC Member No.: 267 |
Jim,
Check out the "Pistons, Cylinders, and Rings Explained" section of Jakes forums. Charles Navarro of LN posted a nice article on head sealing. |
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| mike373 |
Dec 6 2006, 04:07 PM
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#5
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Member Group: Members Posts: 198 Joined: 3-August 05 From: san diego, ca Member No.: 4,536 |
I think I remember Raby saying to make a paste with ajax, and use that as the compound. Mike |
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| Jake Raby |
Dec 6 2006, 04:13 PM
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#6
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Yep.. You have it under the Kitchen sink..
Ajax or Comet mixed to a paste like consistency is the best thing for finish lapping.. It cleans up very easily as well and thats a biggie! |
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| StratPlayer |
Dec 6 2006, 04:22 PM
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#7
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StratPlayer Group: Members Posts: 3,325 Joined: 27-December 02 From: SLC, Utah Member No.: 27 Region Association: Rocky Mountains 
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Interesting, I'm about to start an engine rebuild here shortly. As soon as my parts get back from balancing. I've been wondering about the head gaskets and if that was the way to go or lapping. Ajax (hmmmm). Well for now I have plenty of time to think about it and learn more.
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| Sammy |
Dec 6 2006, 05:30 PM
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#8
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. Group: Members Posts: 1,190 Joined: 21-January 03 From: Orange, Ca Member No.: 178 |
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