Just got the block sleeved, but not the "usual" sleeve/deck job
01-01-2006, 02:39 PM
#1
Just got the block sleeved, but not the "usual" sleeve/deck job
Well...in fact only one cylinder was sleeved. This is a good block with only 80-100 miles on it, and had a piston disintegrate in it. The scuff did not come out with the usual .020" overbore, so pressing in a sleeve to fix it was the only way. To be honest, i didn't even know that this has been done forour motor. Whenever I thought of sleeves, i always thought of Darton/AEBS T-sleeves.
So, here are some pics...
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Our stock motors have the steel inserts from about 2mm below deck down. The block Al casting is done over and under them at each cylinder. So the machinst (who has over 30 years of experience) said that this is the way to repair them, and I am inclined to trust them. In fact, Daron makes inserts such as this from the same material as their T-sleeves. I have heard of at least one insanely high HP car that has been runnign them well (and I mean well) over 1000hp before they started to have issues with it. So that's another avenue that has not been undertaken by the Z community that I believe deserves consideration.
A question for the specialsts: the sleeve is about 1/2 a thou (0.0005") above the deck. I am sure the headgasket will byte on that cylinder, but do you think that it will create issues on the other two cylinders on that bank by virtue of having had lifted the head in one point.
So, here are some pics...
Our stock motors have the steel inserts from about 2mm below deck down. The block Al casting is done over and under them at each cylinder. So the machinst (who has over 30 years of experience) said that this is the way to repair them, and I am inclined to trust them. In fact, Daron makes inserts such as this from the same material as their T-sleeves. I have heard of at least one insanely high HP car that has been runnign them well (and I mean well) over 1000hp before they started to have issues with it. So that's another avenue that has not been undertaken by the Z community that I believe deserves consideration.
A question for the specialsts: the sleeve is about 1/2 a thou (0.0005") above the deck. I am sure the headgasket will byte on that cylinder, but do you think that it will create issues on the other two cylinders on that bank by virtue of having had lifted the head in one point.
Last edited by GurgenPB; 01-01-2006 at 02:42 PM.
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01-01-2006, 04:53 PM
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Originally Posted by GurgenPB
Putting my PE TT kit on it, along with pauter rods, Arias Xtreme duty pistons (9:1 CR), and Nismo cams.
01-01-2006, 05:25 PM
#9
Hey Guys
NV,
Ted's got a set of Nismo cams for $500. Good enough for me.
YOu da man! Your tribulations I'm aware off! Thanks for the thumbs up!
For FI, even stock cams are very good. remember that FI cams must be of a very different design than NA cams, namely low overlap. The more aggressive the NA cam, the greater the overlap. I am jsut trying to increase efficiency here a bit, that's all. And yes, this is for my SEDAN.
Again, thanks for the good wishes... And if anyone has any ideas about the question I asked in my post, I'd still love to hear it.
NV,
Ted's got a set of Nismo cams for $500. Good enough for me.
Wow! Im damn glad you havn't pulled the plug on your car yet Gurg. Your the only one that i know of that has had more heart ache modding then I.
jwt makes the cams for nismo run jwt cams abit more agressive.... is this going in a sedan g35?
Again, thanks for the good wishes... And if anyone has any ideas about the question I asked in my post, I'd still love to hear it.
01-01-2006, 08:42 PM
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the sleeve is about 1/2 a thou (0.0005") above the deck. I am sure the headgasket will byte on that cylinder, but do you think that it will create issues on the other two cylinders on that bank by virtue of having had lifted the head in one point.
but that's just me
just incase you don't like it.it take nothing to stone down .0005" with a good India stone.
01-01-2006, 09:08 PM
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Originally Posted by GurgenPB
A question for the specialsts: the sleeve is about 1/2 a thou (0.0005") above the deck. I am sure the headgasket will byte on that cylinder, but do you think that it will create issues on the other two cylinders on that bank by virtue of having had lifted the head in one point.
01-01-2006, 10:20 PM
#13
Originally Posted by g356gear
My only concern with this scenario, is that usually after being re-sleeved, the block gets decked to even off all cylinders to be the same. What was his logic for not evening the deck surface. Logic dictates that this would be a source for possible headgasket failure.
Hearing from Steve (tinman) above that it will not be, him being a fabricator as well, gives me some comfort. Either way, I will be calling the guy tomorrow to make sure.
Man your sedan will be a BEAST 
01-03-2006, 09:28 AM
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Originally Posted by GurgenPB
His logic was that it is not necessary, though adviseable. I think he didn't do it because i wouldn't like the added cost ($60). I would have insisted on it if I had known that it could be an issue. I seriously think that it's not though, but I have been wrong. The guy was absolutely sure that it will NOT be an issue. 0.0005" is really very little.
Hearing from Steve (tinman) above that it will not be, him being a fabricator as well, gives me some comfort. Either way, I will be calling the guy tomorrow to make sure.
Hearing from Steve (tinman) above that it will not be, him being a fabricator as well, gives me some comfort. Either way, I will be calling the guy tomorrow to make sure.
Steve is actually a machinist
01-03-2006, 03:33 PM
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nissan says never deck block if warped over .004" any direction throw away.
That said it should not be an issue with .0005", if you deck the block very much you need to do a lot more work. main issue is the bolt up of the front cover and intake manifold shift due to the heads being closer together/lower.
That said it should not be an issue with .0005", if you deck the block very much you need to do a lot more work. main issue is the bolt up of the front cover and intake manifold shift due to the heads being closer together/lower.