LS1 block question if anyone can help
All is done and ran good for first 30 minutes. Next day turned it on to do some finishing touches when it started heating up again.
Last edited by RS777; Sep 1, 2010 at 12:09 PM.
Staging Lane
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Teching In
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it went from 200- 245 in about 1 minute and a half. How do i recheck coolant? am i suppose to let it get hot with radiator cap off cause coolant starts shooting everywhere after five minutes of running.
Staging Lane
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Having the thermostat in backwards will cause the same issue as RS777 stated because the coolant is trapped in the block.
After the car has been run and has cooled down where you can hold the palm of your hand on the cap take it off. This is to make sure that you don't get burned. Then see if you need to add water.
Are you sure that your gauge is working? When the gauge spikes to 200-245 range can you hold on to the coolant hoses?
Feel the water inlet and outlet and see if they are the same temp.
After the car has been run and has cooled down where you can hold the palm of your hand on the cap take it off. This is to make sure that you don't get burned. Then see if you need to add water.
Are you sure that your gauge is working? When the gauge spikes to 200-245 range can you hold on to the coolant hoses?
Feel the water inlet and outlet and see if they are the same temp.
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Teching In
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Is it possible to put the thermostat in backwards on LS1's cause it was changed about 2 weeks before it started doing this. I also bought a new water pump and just swapped over the thermostat. I dont think its possible to put in backwards cause it is a whole assembly. can a thermostat come defective or get stuck after once or twice of overheating?
Thread Starter
Teching In
Joined: Aug 2010
Posts: 25
Likes: 0
Having the thermostat in backwards will cause the same issue as RS777 stated because the coolant is trapped in the block.
After the car has been run and has cooled down where you can hold the palm of your hand on the cap take it off. This is to make sure that you don't get burned. Then see if you need to add water.
Are you sure that your gauge is working? When the gauge spikes to 200-245 range can you hold on to the coolant hoses?
Feel the water inlet and outlet and see if they are the same temp.
After the car has been run and has cooled down where you can hold the palm of your hand on the cap take it off. This is to make sure that you don't get burned. Then see if you need to add water.
Are you sure that your gauge is working? When the gauge spikes to 200-245 range can you hold on to the coolant hoses?
Feel the water inlet and outlet and see if they are the same temp.
Thread Starter
Teching In
Joined: Aug 2010
Posts: 25
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Update! after reading everyone's answers. I started searching on how to properly bleed an LS1. Unhooked throttle body hose that goes to the little metal pipe that bolts to cylinder head and filled radiator until full. ( I saw a lot of air bubbles come out of the metal pipe but hardly coolant or air out of rubber hose coming from throttle body. Ran engine for about twenty minutes at idle and only revving it every 3-5 minutes. temp would go from 210 to 225 then go right back down to 210. I'm hoping that was the problem all along cause I wasnt aware of how to properly fill cooling system. Thanks everyone for your help. Makes me feel a lot better to return the car back to my brother in law working. will keep bleeding until no more water goes in. I'll keep you guys informed of how it goes. Thanks!!!
