second engine same f'd up issues.
Thread Starter
Teching In
Joined: Mar 2009
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second engine same f'd up issues. I got the first ls1 up and running in my camaro, went and tested the radiator for hydrocarbons to make sure it was good. It had HC in the rad so i bought one of the block testers and it failed, turned yellow/green. that engine had 66k on it from a 02 f body. So i got another engine from the warranty, it was a 00 y with 37k. i switched everthing over got it running and same thing. HCs at the rad but this one did not fail the block test colored water deal. My first thought was bad head gaskets but on two engines kinda weird. anyone have any ideas. car does not overheat. fans turn on and cool it down. im using the original t-stat. Nothing explains the HCs though. The first engine was a black cloud and had issues from day one so i expected something to be wrong with it. The rest just doesnt make sense.
Did you replace the coolant and flush/clean whatever radiator components got reused?
I don't know how sensitive those tests are. Maybe you are just picking something left over from the last engine?
I don't know how sensitive those tests are. Maybe you are just picking something left over from the last engine?
Thread Starter
Teching In
Joined: Mar 2009
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thats kinda what i was thinking, i used new coolant but i dis not flush anything out. THe weird thing is the HCs made there way up to about 1k in about 20 sec. if there where any left over gases i would not think there would be that much.
also, i notice that after i drive it for a while, i can hear the coolant bubbling in the rad. when i turn it off. i dont know if this is normal or not?
also, i notice that after i drive it for a while, i can hear the coolant bubbling in the rad. when i turn it off. i dont know if this is normal or not?
sounds like you have air in the system (the bubbling).
to ensure that you have ALL the old coolant flushed, pull the top hose off, start the car, fill the radiator with water and keep your hose handy. when the t-stat opens it will suck all that water in and push the warm water out, it shouldnt take very long until the water is coming out clear.
to ensure that you have ALL the old coolant flushed, pull the top hose off, start the car, fill the radiator with water and keep your hose handy. when the t-stat opens it will suck all that water in and push the warm water out, it shouldnt take very long until the water is coming out clear.
Thread Starter
Teching In
Joined: Mar 2009
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to get the HC numbers i used a smog machine at the dealer i work at. (not a gm dealer though) just take off the rad cap and let it run, put the sniffer right ther but dont let the coolant touch the machine. It gives the HCs reading on the computer.
the other test is the one from napa with the test tube looking thing and the bluw water that turn green/yellow if there is exhaust gasses in the cooling system.
going to try and get the air out tonight and see what happens. when i put this engine it i just filled it through the top hose into the engine then the radiator but i didnt think about the heater core so i will see how it goes tonight.
the other test is the one from napa with the test tube looking thing and the bluw water that turn green/yellow if there is exhaust gasses in the cooling system.
going to try and get the air out tonight and see what happens. when i put this engine it i just filled it through the top hose into the engine then the radiator but i didnt think about the heater core so i will see how it goes tonight.
to get the HC numbers i used a smog machine at the dealer i work at. (not a gm dealer though) just take off the rad cap and let it run, put the sniffer right ther but dont let the coolant touch the machine. It gives the HCs reading on the computer.
the other test is the one from napa with the test tube looking thing and the bluw water that turn green/yellow if there is exhaust gasses in the cooling system.
going to try and get the air out tonight and see what happens. when i put this engine it i just filled it through the top hose into the engine then the radiator but i didnt think about the heater core so i will see how it goes tonight.
the other test is the one from napa with the test tube looking thing and the bluw water that turn green/yellow if there is exhaust gasses in the cooling system.
going to try and get the air out tonight and see what happens. when i put this engine it i just filled it through the top hose into the engine then the radiator but i didnt think about the heater core so i will see how it goes tonight.
How are you sealing the air in the shop from getting sucked in to the tester?You can't just hold the probe above the rediator filler hole. The HC is coming from the room air contaminated with exhaust gas.
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