Blown Head Gasket or Cracked Block
11-26-2017, 11:57 AM
#1
Senior Member
Thread Starter
Blown Head Gasket or Cracked Block
Figured I should start a new thread since the other seems to have gotten stale.
Continuation of :
https://www.cobaltss.net/forums/2-0l...ebuild-325360/
Ran an oil analysis and the sample tested positive for glycol, 0.12%. This doesn't seem to match the amount of coolant I lost. Judging by amount I put into the surge tank, I lost upwards of 1 L of coolant, so I would expect the glycol percentages to be much higher.
I tied in an air connection to the coolant surge tank to pressurize the system. Can't hear any leaks, and it doesn't seem like I am losing pressure.
Now I need to determine whether my head gasket has failed, or if I have a cracked block.
Continuation of :
https://www.cobaltss.net/forums/2-0l...ebuild-325360/
Ran an oil analysis and the sample tested positive for glycol, 0.12%. This doesn't seem to match the amount of coolant I lost. Judging by amount I put into the surge tank, I lost upwards of 1 L of coolant, so I would expect the glycol percentages to be much higher.
I tied in an air connection to the coolant surge tank to pressurize the system. Can't hear any leaks, and it doesn't seem like I am losing pressure.
Now I need to determine whether my head gasket has failed, or if I have a cracked block.
11-27-2017, 09:38 AM
#2
Figured I should start a new thread since the other seems to have gotten stale.
Continuation of :
https://www.cobaltss.net/forums/2-0l...ebuild-325360/
Ran an oil analysis and the sample tested positive for glycol, 0.12%. This doesn't seem to match the amount of coolant I lost. Judging by amount I put into the surge tank, I lost upwards of 1 L of coolant, so I would expect the glycol percentages to be much higher.
I tied in an air connection to the coolant surge tank to pressurize the system. Can't hear any leaks, and it doesn't seem like I am losing pressure.
Now I need to determine whether my head gasket has failed, or if I have a cracked block.
Continuation of :
https://www.cobaltss.net/forums/2-0l...ebuild-325360/
Ran an oil analysis and the sample tested positive for glycol, 0.12%. This doesn't seem to match the amount of coolant I lost. Judging by amount I put into the surge tank, I lost upwards of 1 L of coolant, so I would expect the glycol percentages to be much higher.
I tied in an air connection to the coolant surge tank to pressurize the system. Can't hear any leaks, and it doesn't seem like I am losing pressure.
Now I need to determine whether my head gasket has failed, or if I have a cracked block.
11-27-2017, 10:40 PM
#4
Senior Member
iTrader: (6)
I would assume the glycol would burn off way faster than the oil, so it wouldn't be easy to make a direct calculation like that.
OP take a closer look at things, either you have a porus block which will require a new engine (which taking down an engine is a fun experience when you know you're replacing it) or you have to do a head gasket, if the head gasket is the issue you should be able to see right away in the gasket. Then you just have the gasket and head studs to replace. iirc you have a winter car so you have the winter to repair it since it's not a daily. So no need to rush into things and at the very least you'll have fun ripping into the engine.
OP take a closer look at things, either you have a porus block which will require a new engine (which taking down an engine is a fun experience when you know you're replacing it) or you have to do a head gasket, if the head gasket is the issue you should be able to see right away in the gasket. Then you just have the gasket and head studs to replace. iirc you have a winter car so you have the winter to repair it since it's not a daily. So no need to rush into things and at the very least you'll have fun ripping into the engine.