LS7 heads on a LS1 block?
Thread Starter
Teching In
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LS7 heads on a LS1 block? My buddy's shop put on LS7 heads on a LS1 block. He's having all kinds of problems. Water puking out of the overflow. Oil problems. Etc. Do you think any of this has to do with the heads and block.
thanks,
Steve
thanks,
Steve
not even a spun bearings 4.8.
Thread Starter
Teching In
Joined: Mar 2008
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Thanks guys. Keep it coming. The shop always has an excuse. Changing head gaskets, thermostat, water pumps you name it. My buddy's car is a race car. He has to take it to a track every time to see if it runs. Never gets more then 3 laps before something happens.
Steve
Steve
Last edited by corvette racing; Mar 28, 2009 at 05:40 PM.
Look here for a full chart of compatibility in the LSx series
http://images.google.com/imgres?imgu...a%3DN%26um%3D1
http://images.google.com/imgres?imgu...a%3DN%26um%3D1
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Even a 6.0 block isnt enough. LS7 requires 4.1 bore minimum. There is some debate that 4.08 MIGHT be enough but i dont know if anyone has actually tried it yet.
my question is if the block has been sleeved??? No shop in there right mind would install ls7 heads on a 3.9 bore... I dont think the valve would even open.
If the block has indeed been sleeved then i bet they did a **** job sleeving it and thats where the problems are coming from.. If it hasnt been sleeved then i dont see how the thing even runs.
my question is if the block has been sleeved??? No shop in there right mind would install ls7 heads on a 3.9 bore... I dont think the valve would even open.
If the block has indeed been sleeved then i bet they did a **** job sleeving it and thats where the problems are coming from.. If it hasnt been sleeved then i dont see how the thing even runs.
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Verdad Gallardo Thread Starter
Teching In
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He did mention that the block was sleeved. At one time they blamed some sort of o-ring that was not sealing right. Then it was the wrong head gasket. Now they think the pulley is the wrong size on the water pump. I don't think the shop knows what's going on. They just keep guessing at my buddy's expense.
Steve
Steve
sounds to me like they screwed up the sleeves and are trying to put blame elsewhere... if its blowing out water and having oil issues its likely the sleeves weren't installed correctly assuming the head gaskets are good. I dunno, i dont know too much about the sleeving process except if its screwed up you have oil and water issues. I dont see how the size of the water pump pulley would affect anything.
Thread Starter
Teching In
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Thanks for your help.
Steve
