Anyone Scatter a ZZ572?
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Anyone Scatter a ZZ572?

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    Default Anyone Scatter a ZZ572?

    Hi all. I have a ZZ572/720 crate engine with a spun main bearing. Block is ok, and crank will be ok with mains turned .010. One main cap is bad. GM does not service these caps. Hoping that someone has ( or knows someone ) who would sell me a cap, or set of used caps. Perhaps someone kicked a rod out or otherwise ruined a block. Newbie - sorry if wrong place to post - Sincerely appreciate all help.

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    Quote Originally Posted by axlenut View Post
    Hi all. I have a ZZ572/720 crate engine with a spun main bearing. Block is ok, and crank will be ok with mains turned .010. One main cap is bad. GM does not service these caps. Hoping that someone has ( or knows someone ) who would sell me a cap, or set of used caps. Perhaps someone kicked a rod out or otherwise ruined a block. Newbie - sorry if wrong place to post - Sincerely appreciate all help.
    By "service", do you mean they won't sell you a replacement? That would be weird. Regardless, any way you go - as you know you will need to align them all again after you replace the one. I know you are looking for a used one, but it would ALSO necessitate align bore/hone-to-size.

    So, what does that mean that GM says they don't "service" this item??
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    Quote Originally Posted by Beer:30 View Post
    By "service", do you mean they won't sell you a replacement? That would be weird. Regardless, any way you go - as you know you will need to align them all again after you replace the one. I know you are looking for a used one, but it would ALSO necessitate align bore/hone-to-size.

    So, what does that mean that GM says they don't "service" this item??
    Yes sir, it is more than weird, it is ridiculous. Replacement caps are unavailable through GM period - unless you want a new block at over $2K. GMPP does offer 454 type caps, with the straight outer bolts, but not the splayed outer bolt caps for the 572. The block is currently at the machine shop awaiting a cap so that it CAN be align bored/honed as you mentioned. Pro Gram Engineering may be able to supply a whole set. ( expensive) The 572's are assembled by PAS, a Roush company in Livonia, MI, but so far they have not responded to voicemail/email. Somebody has a used cap out there..... Thanks for your input.

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    Quote Originally Posted by axlenut View Post
    Yes sir, it is more than weird, it is ridiculous. Replacement caps are unavailable through GM period - unless you want a new block at over $2K. GMPP does offer 454 type caps, with the straight outer bolts, but not the splayed outer bolt caps for the 572. The block is currently at the machine shop awaiting a cap so that it CAN be align bored/honed as you mentioned. Pro Gram Engineering may be able to supply a whole set. ( expensive) The 572's are assembled by PAS, a Roush company in Livonia, MI, but so far they have not responded to voicemail/email. Somebody has a used cap out there..... Thanks for your input.
    Damn. Sorry to hear that. Yeah, splayed caps are available from lots of vendors, but it sucks that you may have to buy a WHOLE SET.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


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    Quote Originally Posted by axlenut View Post
    Yes sir, it is more than weird, it is ridiculous. Replacement caps are unavailable through GM period - unless you want a new block at over $2K. GMPP does offer 454 type caps, with the straight outer bolts, but not the splayed outer bolt caps for the 572. The block is currently at the machine shop awaiting a cap so that it CAN be align bored/honed as you mentioned. Pro Gram Engineering may be able to supply a whole set. ( expensive) The 572's are assembled by PAS, a Roush company in Livonia, MI, but so far they have not responded to voicemail/email. Somebody has a used cap out there..... Thanks for your input.
    I wouldn't say Roush "ownes" Performance Assembly Solutions as much as its a joint venture or associate partner. Never the less, I am sure they can get there hands on a cap if they chose to. I would try to stay on them. Hell, blame them for the spun bearing due to shitty bearing crush and or tight ass bearing clearnances

    Running a ZZ572, specially the 720, in a boat is risky business if you don't disassemble the thing and check EVERYTHING. It may be "hand built" but it far from blueprinted, and setup less than ideal for marine use.

    Sorry to hear this happened. If you can't get a cap from PAS, Milodon sells a set of 3 splayed caps(which is all the sprotsman bowtie has) made of ductile iron. Little cheaper than Pro Grams caps but not much.
    Big question is, are the splayed bolts on the same angle, and in the same place as a Sportsman Bowtie?

    I'd beg, borrow or steal trying to get PAS to get you a cap.



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    Quote Originally Posted by gn7 View Post
    I wouldn't say Roush "ownes" Performance Assembly Solutions as much as its a joint venture or associate partner. Never the less, I am sure they can get there hands on a cap if they chose to. I would try to stay on them. Hell, blame them for the spun bearing due to shitty bearing crush and or tight ass bearing clearnances

    Running a ZZ572, specially the 720, in a boat is risky business if you don't disassemble the thing and check EVERYTHING. It may be "hand built" but it far from blueprinted, and setup less than ideal for marine use.

    Sorry to hear this happened. If you can't get a cap from PAS, Milodon sells a set of 3 splayed caps(which is all the sprotsman bowtie has) made of ductile iron. Little cheaper than Pro Grams caps but not much.
    Big question is, are the splayed bolts on the same angle, and in the same place as a Sportsman Bowtie?
    I'd beg, borrow or steal trying to get PAS to get you a cap.
    I certainly appreciate your post. I previously checked with a Milodon rep, and their splayed caps are the wrong angle. I sent the bad cap to Pro Gram today, and Dan is going to let me know what they can do after he sees it - could be one of two caps they make, or none of the above, and it won't be cheap. I did receive a reply from PAS this evening via email, and the gentleman advised that they get their blocks complete with machined caps, but said to call him tomorrow - hopefully that will lead somewhere. I did confirm today that Gen VI 454's and 502's use straight bolts on the outer holes, so the cap I need is unique to the 572. I can't believe that GM doesn't offer these caps separate for the one big block that they offer that they know everyone is going to run the crap out of. The engine has been available since around 2004. No cap p/n is listed on my 572 parts list, and I have spoken with Scroggin-Dickey and several other big GMPP dealers, as well as searching the Chevrolet Performance website, and all agree caps are not offered separate from a block. I know what is going to happen here - I will spend big money, and then I'll have offers of used caps for $50 coming out my ears, LOL. Since 2004, there has to have been plenty of these blocks windowed. You guys that are running 572's, beware of this potential parts problem - it blindsided me- never imagined availability of an item like this would be an issue. Sorry for the rant.
    Last edited by axlenut; 10-30-2012 at 08:49 PM.

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    Wow! What a Charlie Foxtrot. Sorry to read this but thanks for the heads up. I was going to start looking for a used 572. Won't now.
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    Quote Originally Posted by axlenut View Post
    I certainly appreciate your post. I previously checked with a Milodon rep, and their splayed caps are the wrong angle. I sent the bad cap to Pro Gram today, and Dan is going to let me know what they can do after he sees it - could be one of two caps they make, or none of the above, and it won't be cheap. I did receive a reply from PAS this evening via email, and the gentleman advised that they get their blocks complete with machined caps, but said to call him tomorrow - hopefully that will lead somewhere. I did confirm today that Gen VI 454's and 502's use straight bolts on the outer holes, so the cap I need is unique to the 572. I can't believe that GM doesn't offer these caps separate for the one big block that they offer that they know everyone is going to run the crap out of. The engine has been available since around 2004. No cap p/n is listed on my 572 parts list, and I have spoken with Scroggin-Dickey and several other big GMPP dealers, as well as searching the Chevrolet Performance website, and all agree caps are not offered separate from a block. I know what is going to happen here - I will spend big money, and then I'll have offers of used caps for $50 coming out my ears, LOL. Since 2004, there has to have been plenty of these blocks windowed. You guys that are running 572's, beware of this potential parts problem - it blindsided me- never imagined availability of an item like this would be an issue. Sorry for the rant.
    I agree, PAS is receiving the blocks complete and machined. But I have to believe they have the connections and means to aquire a cap. Its just a matter of them taking the effort. The cap is a seperate casting and it just can't be that hard for them to get one, even if its rough machined. Its all just channels and connections.
    Yes the 572 is built on the tall deck Bowtie platform, and is different than the production 454 and 502 blocks. Although the engine has been in production since 2004, the block and caps have changed thru the years. I "believe" the original 572s have billet main caps. GM hasn't always offered a "sportsman" Bowtie. When they came out with that, the ZZ572 started using that block. Not sure how long thats been.

    Good luck. Sure would like to see PAS step up and help you out with this. They are your only hope of getting an OEM replacement cap.



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    Quote Originally Posted by axlenut View Post
    I certainly appreciate your post. I previously checked with a Milodon rep, and their splayed caps are the wrong angle. I sent the bad cap to Pro Gram today, and Dan is going to let me know what they can do after he sees it - could be one of two caps they make, or none of the above, and it won't be cheap. I did receive a reply from PAS this evening via email, and the gentleman advised that they get their blocks complete with machined caps, but said to call him tomorrow - hopefully that will lead somewhere. I did confirm today that Gen VI 454's and 502's use straight bolts on the outer holes, so the cap I need is unique to the 572. I can't believe that GM doesn't offer these caps separate for the one big block that they offer that they know everyone is going to run the crap out of. The engine has been available since around 2004. No cap p/n is listed on my 572 parts list, and I have spoken with Scroggin-Dickey and several other big GMPP dealers, as well as searching the Chevrolet Performance website, and all agree caps are not offered separate from a block. I know what is going to happen here - I will spend big money, and then I'll have offers of used caps for $50 coming out my ears, LOL. Since 2004, there has to have been plenty of these blocks windowed. You guys that are running 572's, beware of this potential parts problem - it blindsided me- never imagined availability of an item like this would be an issue. Sorry for the rant.
    I have a few extra billet angle caps off a chev tall deck block lying around send me your address and I'll ship one out to you. Or call me, ask for Jim at J&J marine 856-228-4744
    Last edited by jimclauss; 10-30-2012 at 09:43 PM.

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    Quote Originally Posted by jimclauss View Post
    I have a few extra billet angle caps off a chev tall deck block lying around send me your address and I'll ship one out to you.
    If you have them and he wants to got that route, which he probably should, he needs to replace at least the 3 center caps. The 3 center caps on the sportsman are the only ones splayed, but they are nodular cast caps. Replacing ONE center cap with a billet is not the best solution. I guess if he has to align bore/hone the block anyway, the center cap would be the best place to put a single billet cap.
    Even if you sell them to him he is way ahead going that route.

    Either way Jim, its a super offer!!!!!



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    Last edited by gn7; 10-30-2012 at 09:47 PM.

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    Quote Originally Posted by axlenut View Post
    Yes sir, it is more than weird, it is ridiculous. Replacement caps are unavailable through GM period - unless you want a new block at over $2K. GMPP does offer 454 type caps, with the straight outer bolts, but not the splayed outer bolt caps for the 572. The block is currently at the machine shop awaiting a cap so that it CAN be align bored/honed as you mentioned. Pro Gram Engineering may be able to supply a whole set. ( expensive) The 572's are assembled by PAS, a Roush company in Livonia, MI, but so far they have not responded to voicemail/email. Somebody has a used cap out there..... Thanks for your input.
    I lost two main caps in my BBC Merlin III a couple of months ago, can't buy them from World products and can't locate any. Slowing down the build, just need two!!!
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    Quote Originally Posted by jimclauss View Post
    I have a few extra billet angle caps off a chev tall deck block lying around send me your address and I'll ship one out to you. Or call me, ask for Jim at J&J marine 856-228-4744
    Been away - just saw this - PM sent. Will call tomorrow. Thanks!

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    Quote Originally Posted by fireboat607 View Post
    I lost two main caps in my BBC Merlin III a couple of months ago, can't buy them from World products and can't locate any. Slowing down the build, just need two!!!
    During my search, ( while I was still figuring out who actually made my block for GM) I was looking at World's web site, and under the "garage sale" tab they were listing some caps for Merlin blocks. This was just a few days ago - check it out. Good luck.

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