milky oil?????
07-16-2010, 11:56 AM
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milky oil????? Ok I have a 2009 zo6 ls7 vette with a 6 pound vortech kit on it. Car is tune and was running great until I got it to about 180 on the highway. The car started to blow oil back through the air filter and now my oil is all milky after I changed it. I did have to add some antifreeze and the car did go to 230 on the temp once but since I added coolant the temp hasnt been above 195. The spark plugs are all burning good and the car still runs like a champ even with the milky oil lol. Could I have lifted a head being its a bone stock ls7 motor?
07-16-2010, 12:16 PM
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typically detonation breaks the ring land and the check breaks the cylinder.Seen this more than once on ls7's.Sometimes it takes a while before it shows up on a compression test.6 lbs isn't near enough to push out a head gasket.
07-16-2010, 12:25 PM
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How would I have gotten detination if the tune and everything was dead on?
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07-16-2010, 12:57 PM
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I wish I still had my dyno sheet to show u but I know it was done right. Now I know and understand abusing **** like I did will cause stuff to happen. I just didnt think I could crack a cylinder especially being the spark plugs I pulled out look great. Thats why I thought I had just lifted the head. Is there any chance that thats what I did or what u said is basically what I did.
07-16-2010, 01:16 PM
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I wish I still had my dyno sheet to show u but I know it was done right. Now I know and understand abusing **** like I did will cause stuff to happen. I just didnt think I could crack a cylinder especially being the spark plugs I pulled out look great. Thats why I thought I had just lifted the head. Is there any chance that thats what I did or what u said is basically what I did.
07-16-2010, 01:27 PM
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07-16-2010, 01:55 PM
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07-16-2010, 04:04 PM
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Dont drive the car on any long trips when it goes you will be done.
07-17-2010, 07:55 AM
#18
Hmm usually oil in coolant is from cracked head, cracked block,blown head gasket or maybe wrong head gasket or head gasket sealing problem.
I had big coolant into my oil when first fired up my new 408 and aps kit. Caught it right away as was checking things religiously but still put lots of coolant into the oil but not vice versa. Was worried it was block or head gasket or head but it was my turbo.It uses oil and water cooling and one must be internally cracked letting coolant mix with oil.
As said other thing might be if your setup uses some type of water cooling for the oil and its getting in that way. But otherwise head gasket, cracked block or cracked head.
When you detonate you usually break ringlands. But didn't think this would usually put water into oil. just usually lots of oil starts coming out tailpipes.
I have seen many stock engines mostly ls1s with broken ringlands at pretty low boost. I think timing is likely most important variable more than boost which varies tremendously according to the FI setup. 6 pounds thru a huge turbo or super is not same as 6psi thru a much smaller one. Totally different airflow and power at that same 6psi.
I had big coolant into my oil when first fired up my new 408 and aps kit. Caught it right away as was checking things religiously but still put lots of coolant into the oil but not vice versa. Was worried it was block or head gasket or head but it was my turbo.It uses oil and water cooling and one must be internally cracked letting coolant mix with oil.
As said other thing might be if your setup uses some type of water cooling for the oil and its getting in that way. But otherwise head gasket, cracked block or cracked head.
When you detonate you usually break ringlands. But didn't think this would usually put water into oil. just usually lots of oil starts coming out tailpipes.
I have seen many stock engines mostly ls1s with broken ringlands at pretty low boost. I think timing is likely most important variable more than boost which varies tremendously according to the FI setup. 6 pounds thru a huge turbo or super is not same as 6psi thru a much smaller one. Totally different airflow and power at that same 6psi.
07-17-2010, 01:05 PM
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Cracked cylinder, 10000x The Ls7's cylinder wall thickness Isnt ideal.
Also to the OP.. you can get any car dead on, On a DYNO. As soon as you took it on that crazy high speed run, factors came into play that dont on a dyno.. I.E. wind resistance, which will put more load on the engine and will change A/F.
Pressure test the cooling system on a warm engine.
Btw.. It may run fine on Milky oil, But Im betting your bearings arent enjoying it as much.
Goodluck with the rebuild.
Also to the OP.. you can get any car dead on, On a DYNO. As soon as you took it on that crazy high speed run, factors came into play that dont on a dyno.. I.E. wind resistance, which will put more load on the engine and will change A/F.
Pressure test the cooling system on a warm engine.
Btw.. It may run fine on Milky oil, But Im betting your bearings arent enjoying it as much.
Goodluck with the rebuild.
