Water disappearing, no leaks, not overheating
02-01-2011, 02:38 PM
#1
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Water disappearing, no leaks, not overheating 04 ls1, stock, i got a substantial amount of water disappearing from my radiator, there are no leaks, it doesn't overheat or anything, could a head gasket be blown and NOT make the engine overheat????
02-01-2011, 06:27 PM
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Hi,i would run a compression test along with a vacuum check. This will tell you if the head gasket is bad or other internal issues. You can borrow tools from autozone or oreilly auto parts. Good luck with resolving this problem.
Have a blessed day.ps:do a pressure test on the cooling system to double check for leaks...jim
02-03-2011, 06:15 PM
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oil is fine, waterpump isn't leaking. im trying to get around to doing a compression and coolant pressure test.
COULD coolant getting in the cylinder cause a spark knock? and would it be enough to make the knock sensor read the knock?
COULD coolant getting in the cylinder cause a spark knock? and would it be enough to make the knock sensor read the knock?
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02-04-2011, 02:36 PM
#8
Not sure about that but pressure test your cooling system and if the pressure goes down and you have no visual leak it is a bad HG and the coolant is leaking in the cylinder. Just do a THOROUGH visual on everything like heater hose fittings etc.... It should hold a steady 16-18lbs.
02-04-2011, 05:57 PM
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i agree with the above. test everything.
just a word of warning, number 8 is a bitch to get to. you have to remove the coil packs and air tube to get to it. but you CAN do a compression test on it. i used a braided test line. the rubber hose gets kinked up.
just a word of warning, number 8 is a bitch to get to. you have to remove the coil packs and air tube to get to it. but you CAN do a compression test on it. i used a braided test line. the rubber hose gets kinked up.
02-04-2011, 06:16 PM
#11
Somebody explain to me how a compression test will find a HG leak LOL....
OP it costs more but there is a kit you can buy to test for exhaust gas residue in the coolant that is foolproof... Honestly since you are not running hot I doubt a blown HG. Simplest thing is to DO A PRESSURE TEST....
OP it costs more but there is a kit you can buy to test for exhaust gas residue in the coolant that is foolproof... Honestly since you are not running hot I doubt a blown HG. Simplest thing is to DO A PRESSURE TEST....
02-04-2011, 08:19 PM
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hi,the compression test gives the pressure from each cylinder as you spin the engine 4X. readings should vary slightly (150-140-145-150) normal reading. usually 10/25% is max accepted level.(140-80-90-145) this indicates a problem on the two low readings. (usually a head gasket) BUT POSSIBLE OTHER CONDITIONS. the vacuum test indicates vacuum leaks /valves/rings/timing/piston/etc issues.i hope this answers your question and sheds light on the subject. these are the easy way to eliminate problems quickly without guess work. have a blessed day.jim
PS: CHECK THE SPECS FOR YOUR COMPRESSION READINGS AND VACUUM.
02-06-2011, 11:49 AM
#13
With all due respect Jim when doing a compression test how do you distinguish a blown HG from worn out rings, or leaky/bent/burned valves???? You can't.....which is why a leakdown test is such a good diagnostic tool because it lets you pinpoint a problem to the top or bottom and even the individual valve... but even a leakdown will not tell you whether you have a HG issue....
BUT A PRESSURE TEST OR CHEMICAL TEST WILL....
BUT A PRESSURE TEST OR CHEMICAL TEST WILL....
02-06-2011, 02:55 PM
#14
With all due respect Jim when doing a compression test how do you distinguish a blown HG from worn out rings, or leaky/bent/burned valves???? You can't.....which is why a leakdown test is such a good diagnostic tool because it lets you pinpoint a problem to the top or bottom and even the individual valve... but even a leakdown will not tell you whether you have a HG issue....
BUT A PRESSURE TEST OR CHEMICAL TEST WILL....
BUT A PRESSURE TEST OR CHEMICAL TEST WILL....
Obviously, there is many other factors that come into play like you suggested and there are better choices but it is still a good test to run.
OP: Pressure Test Your Cooling System.
03-06-2011, 03:37 PM
#16
Is your low water light on?
Do you have water in your overflow tank? For a long time everytime I checked my water I was low but never low enough to set the light off. My hot water was expanding and going to my empty overflow, then slowly evaporating. Over time I was loosing water. If you fill the over flow the hot water hits the cool water and won't evaporate. With a full overflow I haven't lost coolant in a long time...
Do you have water in your overflow tank? For a long time everytime I checked my water I was low but never low enough to set the light off. My hot water was expanding and going to my empty overflow, then slowly evaporating. Over time I was loosing water. If you fill the over flow the hot water hits the cool water and won't evaporate. With a full overflow I haven't lost coolant in a long time...
