Cannot keep engine cool!!!!!!!!!!!
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On The Tree
Joined: Mar 2004
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From: Michigan
Cannot keep engine cool!!!!!!!!!!! I have a 1999 LS1, and it will not stay cool at all. I am not running it like most of you all in cars, I am running it in a Jeep Wrangler. The Jeep has no fenders, so air is constantly hittting the engine, I have a 160 degree thermostat, stock water pump, 32" radiator, 15" and 10" fans. Why can I not keep this thing from getting hot. After running it hard for a little while, I am instantly at 230 degrees. I am running an Auto Meter guage, and the sensor is in the left side head. Is there something else I should be doing.
FYI- I just put a .515 .522 cam, and LS6 intake on it, and have not had it reprogrammed yet. I am not sure if that really matters. Also, the dexcool to water ratio was a little too much dexcool!!
Thanks for the help!!
FYI- I just put a .515 .522 cam, and LS6 intake on it, and have not had it reprogrammed yet. I am not sure if that really matters. Also, the dexcool to water ratio was a little too much dexcool!!
Thanks for the help!!
Thread Starter
On The Tree
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From: Michigan
Originally Posted by 2000LS1M6
your fans may not be coming on when there supposed too...get a tune, that should solve your problem.
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Originally Posted by bcrishon
The fans are on a manual switch, and I run them as soon as it gets 180 degrees!
did you bleed the cooling system?
this is a really stupid question...but are the fans actually coming on? and are they facing the correct way?
t stat workign properly?
rad cap new?
water pump working correctly?
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Originally Posted by bcrishon
I have a T/B bypass, so there is no coolant running through there.
On The Tree
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I have an idea!!! When I installed my LS1 in my kitcar the engine kept boiling. I have no heater and so I had blocked off the heater feed and return ports on the side near the thermostat.
The problem was that the water pressure was not balanced on each side of the thermostat and was forcing it shut.
I had to loop a short pipe from the heater feed to the return and then everything was cool!
On the old SBC you could simply blank off the heater ports but not so on the LS1.
Hope this is your problem too.
The problem was that the water pressure was not balanced on each side of the thermostat and was forcing it shut.
I had to loop a short pipe from the heater feed to the return and then everything was cool!
On the old SBC you could simply blank off the heater ports but not so on the LS1.
Hope this is your problem too.
Thread Starter
On The Tree
Joined: Mar 2004
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From: Michigan
Originally Posted by BrandonDrecksage
theres gotta be something wrong with your rad then..once the fans come on..it should get cool. doesn't only happen when your getting on it?
did you bleed the cooling system?
this is a really stupid question...but are the fans actually coming on? and are they facing the correct way?
t stat workign properly?
rad cap new?
water pump working correctly?
did you bleed the cooling system?
this is a really stupid question...but are the fans actually coming on? and are they facing the correct way?
t stat workign properly?
rad cap new?
water pump working correctly?
The fans are coming on and are moving air in the correct direction!
The rad cap in brand new, and everything shows me the water pump is working. I can let it sit and idle for about 10 minutes and the temp comes right down to about 190.
Thanks for the help and let me know if there is anything else you think of!!
Thread Starter
On The Tree
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From: Michigan
Originally Posted by P Mack
So you're saying that coolant line isn't hooked up to your radiator? That will cause overheating. The line isn't just for the throttlebody, it's there to let air pockets escape from the heads.
Thread Starter
On The Tree
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From: Michigan
Originally Posted by Tommy Tucker
When I installed my LS1 in my kitcar the engine kept boiling. I have no heater and so I had blocked off the heater feed and return ports on the side near the thermostat.
The problem was that the water pressure was not balanced on each side of the thermostat and was forcing it shut.
I had to loop a short pipe from the heater feed to the return and then everything was cool!
On the old SBC you could simply blank off the heater ports but not so on the LS1.
Hope this is your problem too.
The problem was that the water pressure was not balanced on each side of the thermostat and was forcing it shut.
I had to loop a short pipe from the heater feed to the return and then everything was cool!
On the old SBC you could simply blank off the heater ports but not so on the LS1.
Hope this is your problem too.
I have installed a Mojave heater in it, so I do not think that is my problem. Thank you for the input!!
Thread Starter
On The Tree
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From: Michigan
Originally Posted by daryl2cb@yahoo.com
I would make sure the fans are pulling air, and not pushing it, friends 1989 tpi had this problem after he rewired to a manual switch like you. check it out.
Originally Posted by bcrishon
No it is not, there is no coolant running through the T/B, so I guess that is just blocked off. When I put the LS6 intake on, I had to adapt the coolant lines under the intake and I bought the correct ones from GM so I did not think it mattered. So you are saying to hook that little line up to my radiator and it will help??
Thread Starter
On The Tree
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From: Michigan
Originally Posted by P Mack
Yes, it should help. The hard part is if your radiator doesn't have a place for it to hook up you have to tap into the radiator or a hose. The guys in the conversion forum have dealt with this before.
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From: Fat Chance Hotel
They run through the TB then into the radiator neck. It bleeds off the air that's in the cooling system.
Since it cools off at idle it sounds like the engine is producing too much heat under load. Are you running extremely lean? what altitude?
Since it cools off at idle it sounds like the engine is producing too much heat under load. Are you running extremely lean? what altitude?
Thread Starter
On The Tree
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From: Michigan
Originally Posted by technical
They run through the TB then into the radiator neck. It bleeds off the air that's in the cooling system.
Since it cools off at idle it sounds like the engine is producing too much heat under load. Are you running extremely lean? what altitude?
Since it cools off at idle it sounds like the engine is producing too much heat under load. Are you running extremely lean? what altitude?