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04-09-2007, 12:41 AM | #1 |
20psi boost
Join Date: May 2006
Location: New Haven/Hamden
Posts: 793
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With the block still installed in the vehicle, you can lap the block yourself by hand, but the lapping tool is like $400 and you need lapping compound. And you need to remove the dowel pins that are in the block (that help line up the head). And they don't just come out, you need to use a special puller. Plus it takes hours, upon hours to lap the block by hand, you are looking at, at least 12 hours of hand lapping, probably more if the block surface is really bad. Or you can rip the block out, strip it down and send it to a machine shop. Which is alot easier said than done.
Just use a stock replacement head gasket. Trust me, your block sealing surface is not in good enough condition for a metal head gasket. The block surface needs to be in brand new condition as in "straight off the assembly line" condition. The factory head gasket leaves "bite marks" in the block surface that need to be fully removed in order for a metal head gasket to not leak. Last edited by IHateHacks; 04-09-2007 at 12:43 AM. |
04-09-2007, 01:15 AM | #2 |
1000whp postwhore
Join Date: Apr 2007
Location: Escape from the Prison Planet
Posts: 1,356
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You should leave your cam covers on, their placement is crucial to your starting the auto at a later date. It's going to be easier to pull the entire tranny at the same time as the engine. I say easy but the truth is you have some work to do either way.
I lapped my block while still inside the engine bay. Because there's just no need to pull it if you can keep from it. I hope this doesn't bite me in the ass and if it does it'll be a ground zero rebuild. |
04-10-2007, 12:34 AM | #3 |
12psi boost
Join Date: Jun 2006
Location: salem mass
Posts: 329
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well i dk, im not pulling the block. couldnt u just liek wet sand, steel wool, any other highhhh grit abrasiv material, it till its pretty much smooth?
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04-10-2007, 02:57 PM | #4 |
20psi boost
Join Date: May 2006
Location: New Haven/Hamden
Posts: 793
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That's what a lapping tool does. Its a heavy (like 60lbs) disc about 12 inches in diameter. You use a special lapping compound that acts as an abrasive. You can do this with the block in the car, but it WILL kill your back. And like I said you need to find a way to remove the dowel pins from the block because they will interfere with the lapping tool.
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04-10-2007, 06:00 PM | #5 |
1000whp postwhore
Join Date: Apr 2007
Location: Escape from the Prison Planet
Posts: 1,356
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Hello those dowel pins are half the battle I think, lol.
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04-11-2007, 02:14 AM | #6 |
12psi boost
Join Date: Jun 2006
Location: salem mass
Posts: 329
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ok well it seems the dowel pins r ganna be the problem, and if u can just wet sand it or use rubbing compound or sumthign to smooth it out y not just do that, i dont think u necceserily need a lapping too. u culd essentially use a disk sander with high grit and sum kind of rubbing compound, im almost 100% sure there ways around this...all i gatta do is take those pins out then.
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nothing but the best -mods- so far K&N intake fipk 3" megan downpipe 3"turbo elbow 4 washers on the wastegate highflow cat short shifter 89+ front bumper, pic soon to come many more upgrades soon |
04-11-2007, 02:24 AM | #7 |
1000whp postwhore
Join Date: Apr 2007
Location: Escape from the Prison Planet
Posts: 1,356
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Your'e almost 100% sure of what???? That your gonna be in the market for a new engine soon, or that you really want to rebuild the entire engine after 5 heat cycles. Because you'll be lucky to get that far if you take a da sander with 80 grit to the block.
I'm sorry but that's simply the most ignorant statement that I have heard in a long time. You can do this by hand if you have to without a lapping tool. You would be better to get a straight 2x4 instead of a powered sander. Start with 240 grit and a sanding block from the autobody section of your local parts house. Get a feeler gauge and a tool with a machined edge. Use fresh cheap oil as lubricant. Atleast this way you can't screw anything up to the point of having to pull the block. |
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