Anyone know where I can get a new LS7 block? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

docwra · 11-03-2023, 04:32 AM

Long story short, took my Z28 on some European trackdays last year.
At roughly 170 mph on the autobahn one of the sportcats collapsed, leading to head gasket failure and a piston cracking.

Got that fixed but car overheated again shortly afterwards, have rechecked and theres a crack in one of the bore liners

Looking at getting it resleeved but if this isnt possible Ill need to replace the block, funnily enough they arent exactly common here in the UK

AustexaSS · 11-04-2023, 05:41 PM

I would suggest contacting any of these reputable companies. They all specialize in LS engines. You may need to be prepared to take the LS block of your choice and modify it to be an LS7.

https://sdparts.com

https://www.texas-speed.com/

https://www.mastmotorsports.com/

https://americanheritageperformance.com/

1970judge · 11-04-2023, 07:05 PM

Quote:

Originally Posted by AustexaSS

I would suggest contacting any of these reputable companies. They all specialize in LS engines. You may need to be prepared to take the LS block of your choice and modify it to be an LS7.

https://sdparts.com

https://www.texas-speed.com/

https://www.mastmotorsports.com/

https://americanheritageperformance.com/

I second this. If I were in you’re position SDPC would be my first call. And the others listed.

docwra · 11-05-2023, 03:58 AM

Nice one, thanks guys. I really want to stick with the LS7 if I can as its not really an Z28 without one, hopefully sleeving will work but it snot going to be cheap either way

chevy pilot · 11-05-2023, 04:14 AM

You live in UK,these are possible in FI.

https://www.kivinummiracing.fi/index...torit/ls7-7-0l
https://laukkanenmotorsport.fi/c1086...es-bare-blocks

fatima mehru · 11-23-2023, 03:48 AM

Replacing the LS7 block is a viable option if resleeving is not possible. The LS7 block is not commonly found in the UK, but there are a few sources that can provide you with a new one. Some reputable sellers include Katech, Mast Motorsports, and Ed Rinke Performance.

docwra · 11-23-2023, 04:37 AM

Cheers, its at the machinist being resleeved atm, fingers crossed it will work!

joelster · 11-24-2023, 05:35 PM

I bought a cracked LS7 block off of a racer friend of mine. Was cracked from a valve snapping off. The crack went into the water jacket. His local machine shop wouldn't touch it. I paid him $200 for it. I took it to my world class machine shop Jan-Cen Racing Engines and Mike Janis himself came out to take a look at it. He said that he's repaired way worse blocks and that it shouldn't be a problem. I will let you know when I get it back, what the total dollar amount was.

Dega Man · 11-26-2023, 07:11 PM

Another great shop is Livernois, they have a very nice machine and fabrication facility which can more than likely easily handle your issue. If that fails I would highly recommend going with a RHS block which will handle whatever you throw at it especially in a natural aspirated setup.

Trickskier · 11-27-2023, 03:30 PM

Quote:

Originally Posted by docwra

Cheers, its at the machinist being resleeved atm, fingers crossed it will work!

If re-sleeving doesn't work you can buy an LS7 block directly from Chevrolet Performance. Link below:

https://www.chevrolet.com/performanc...ylinder-blocks

FASTFATBOY · 11-27-2023, 03:37 PM

Well THAT sucks

docwra · 11-28-2023, 07:57 AM

Quote:

Originally Posted by FASTFATBOY

Well THAT sucks

Tell me about it, Id just spent the best part of $5K getting the head gasket - that we thought was the problem - fixed as well

If the liners dont work I dont want to think about the potential cost, I cant imagine getting a block shipped from US to UK is cheap and if I put anything other than an LS7 in its not a Z28 anymore ........

Dega Man · 11-28-2023, 10:00 AM

Excuse my earlier post, I overlooked that you were located in the UK, however there are Chevrolet dealerships in the UK I think that you should be able to order the block that trickskier provided if it comes to that.

11-03-2023, 04:32 AM	#1
docwra Drives: 2015 Z28 Join Date: Feb 2022 Location: Cambridge UK Posts: 129	Anyone know where I can get a new LS7 block? Long story short, took my Z28 on some European trackdays last year. At roughly 170 mph on the autobahn one of the sportcats collapsed, leading to head gasket failure and a piston cracking. Got that fixed but car overheated again shortly afterwards, have rechecked and theres a crack in one of the bore liners Looking at getting it resleeved but if this isnt possible Ill need to replace the block, funnily enough they arent exactly common here in the UK

11-24-2023, 05:35 PM	#8
joelster Drives: '94 Z28+ '15 Z/28 Join Date: Jun 2009 Location: Cheektowaga, NY Posts: 1,282	I bought a cracked LS7 block off of a racer friend of mine. Was cracked from a valve snapping off. The crack went into the water jacket. His local machine shop wouldn't touch it. I paid him $200 for it. I took it to my world class machine shop Jan-Cen Racing Engines and Mike Janis himself came out to take a look at it. He said that he's repaired way worse blocks and that it shouldn't be a problem. I will let you know when I get it back, what the total dollar amount was. __________________ 1973 Mach 1, 351C cruiser '15 Z/28 Red Hot, A/C 1980 Z28- resto-mod project 1979 Y84 Trans Am 1986 IROC-Z

11-27-2023, 03:37 PM	#11
FASTFATBOY Drives: 2013 ZL1 Join Date: Nov 2018 Location: Mobile Al Posts: 302	Well THAT sucks __________________ 2013 ZL1 M6, 2.4 pulley and a few bolt ons. 590 wheel and 11.70@122 on a hard tire.

11-04-2023, 05:41 PM	#2
AustexaSS Build Date - Dec 08, 2014 Drives: 2015 Z/28, #1007, Black A/C Stereo Join Date: Oct 2015 Location: Austin, Texas Posts: 197	I would suggest contacting any of these reputable companies. They all specialize in LS engines. You may need to be prepared to take the LS block of your choice and modify it to be an LS7. https://sdparts.com https://www.texas-speed.com/ https://www.mastmotorsports.com/ https://americanheritageperformance.com/

11-05-2023, 03:58 AM	#4
docwra Drives: 2015 Z28 Join Date: Feb 2022 Location: Cambridge UK Posts: 129	Nice one, thanks guys. I really want to stick with the LS7 if I can as its not really an Z28 without one, hopefully sleeving will work but it snot going to be cheap either way

11-05-2023, 04:14 AM	#5
chevy pilot Drives: 2010 2SS/RS A6 Join Date: May 2019 Location: Hki.Finland Posts: 952	You live in UK,these are possible in FI. https://www.kivinummiracing.fi/index...torit/ls7-7-0l https://laukkanenmotorsport.fi/c1086...es-bare-blocks

11-23-2023, 03:48 AM	#6
fatima mehru Drives: Honda Civic Oriel Join Date: Nov 2023 Location: Islamabad, Pakistan Posts: 2	Replacing the LS7 block is a viable option if resleeving is not possible. The LS7 block is not commonly found in the UK, but there are a few sources that can provide you with a new one. Some reputable sellers include Katech, Mast Motorsports, and Ed Rinke Performance.

11-23-2023, 04:37 AM	#7
docwra Drives: 2015 Z28 Join Date: Feb 2022 Location: Cambridge UK Posts: 129	Cheers, its at the machinist being resleeved atm, fingers crossed it will work!

11-26-2023, 07:11 PM	#9
Dega Man Drives: ZL1 Join Date: Oct 2012 Location: Talladega Posts: 631	Another great shop is Livernois, they have a very nice machine and fabrication facility which can more than likely easily handle your issue. If that fails I would highly recommend going with a RHS block which will handle whatever you throw at it especially in a natural aspirated setup.

11-28-2023, 10:00 AM	#13
Dega Man Drives: ZL1 Join Date: Oct 2012 Location: Talladega Posts: 631	Excuse my earlier post, I overlooked that you were located in the UK, however there are Chevrolet dealerships in the UK I think that you should be able to order the block that trickskier provided if it comes to that.