There are a few symptoms of a blown head gasket. The first one is loss of coolant. Coolant can be lost from the leak in the gasket into the cylinder. From there it can go past the piston rings and into the crankcase or it can be forced out of the exhaust system by the action of the piston coming up on the exhaust stroke.
If the coolant enters the crankcase it mixes with engine oil. Of course oil and water don't mix very well but the presence of ethylene glycol (anti freeze) and the agitation caused by the crankshaft and other moving parts can whip the mixture of coolant and oil into a milkshake.
If the coolant is forced out of the exhaust system it is usually heated by the hot exhaust manifold and the rest of the exhaust system. This results in a sweet smelling steam emanating from the tailpipe. The steam is rather persistent, that is it will hover in the air and not dissipate like the normal steam that comes from the combustion process.
Testing an automobile engine for a blown head gasket is pretty straightforward. The first check is to see if there are combustion gasses getting into the cooling system. Take a sample of the coolant and go to the local radiator shop and request that they analyze the coolant for the presence of hydrocarbons. If they are present then it is most likely that you have a blown head gasket.
Another check is to look at the oil of a warmed up engine. The antifreeze in the oil will whip it up into a frothy brown mixture that looks like a milk shake. If it looks like chocolate mousse then you probably have a blown head gasket.
Another check is to fill the cooling system to the brim and remove the radiator cap. Do this when the engine is cool. Start the engine and race it. If there is a compression leak and the gasses are going into the cooling jacket then the gasses will displace the coolant. Since the cap is off the coolant will be pushed out of the radiator. You probably have a blown head gasket.
One of the best ways to check is to hook up a compression tester, "this is a simple pressure gauge that screws in where your spark plugs go, you have to do each cylinder one at a time, remove a spark plug and screw in the tester, then crank the engine or start it and observe the reading on the gauge, compare this reading to the factory specifications wich can be found in the chiltons or alike book for your vehichle they can also be found online. If your reading is lower than the factory specs you most likely have a blown head gasket, and testing in this manner will also tell you wich cylinder. Although for repair one gasket usually covers 3-4 cylinders or one head.
A compression test will tell you if a head gasket is blown on ANY engine. Also, white smoke tells you that your burning anti-freeze, which means a head gasket is blown.
Just look at your engine oil and you can tell, if it looks milky there is water getting into the oil and that's the sign of a blown intake gasket or head gasket.
A dye test will tell you if your head is damaged in the event of a blown head gasket. It turns colors anywhere it is leaking on the head, hence where any cracks would be.
A compression test will verify if the head gasket if blown or not, the majority of the time.
I hate to tell you this but I just paid $3,500 at the Nissan dealer for head gasket replacment.
Oil in the radiator or water in the oil which will show up as white gloopy stuff on the oil level stick.
antifreeze in the oil should be a milkshake color
Pressure test the cylinders, but smart money will replace both.
yes but if it is a blown head gasket it will make it miss and put steam and some water out the tell pipe if its not doing these things then check your anti knock sensor
Any smoke ( blue ) coming out the exhaust ?
A good way to tell is change your oil. When a head gasket blows you will have water in your oil or oil in your water system. Check these 2 areas for water and oil.
White smoke from the exhaust is a sure sign of a blown head gasket. You will also be loosing coolant with no apparent leak. A compression test will verify this. A rod will knock if the bearings are worn.
Check your cylinder pressure with a compression gauge. The gauge will hook up to your spark plug openings.
It sounds like a blown head gasket to me. Take it to someone that has a exhaust gas measuring tool and they can tell you for sure if it is the head gasket.
If your gasket has blown and overheating occured then skimming will almost certainly be needed. Send it for testing and skimming better to be safe than sorry.
Signs of a blown head gasket are: White smoke that has a sweet smell coming from the exhaust. Loosing coolant with no apparent leak. Coolant mixed with the oil, which will look milky. Air bubbles in the radiator when the engine is started cold with the radiator cap removed. A cooling system bleed down test will verify a blown gasket or leak. Finally a compression test will verify a blown gasket or cracked head.
you probably have a blown head gasket. Is there any water in your oil? It easiest to tell by checking engine oil cold. If you see white or gray colored stuff in your oil it is water and that means a blown head gasket.
Most of the time you can tell by removing the radiator cap and having someone start the engine. Make sure you are not standing over it and you might want to lay a rag over the opening. If the head gasket is blown, then coolant will come out like "Old Faithful".
if it is coolant and not condensation. I would say you have a blown head gasket. the coolant will smell sweet. but if it is a bad head gasket it will run hot also.
You possibley have a blown head gasket on the side that is blowing water and steam. 390 s are good solid blocks pull the head on that side and check carefuly to see if you can spot the bypassed gasket. If not a gasket a good idea to have the heads checked for cracks then the engine. Small steps. could be a blown head gasket on that side, or a bad intake gasket. The side you see white smoke from has a head gasket or cracked head problem. If sparkplug has water or rust on it you have located the cyl of question. Is it the Intake manifold or head gasket. Water runing into intake valve would be noticeable when you pull the intake manifold. You might hear knock when motor is hot, that would indicate steam knock from blown head gasket. Piston in question would be steam clean from antifreeze hard blast on ignition................. ........ do a compression test, a week cylinder could indicate not only a blown head gasket but also tell you what cylinder.
A blown head gasket will ultimately leave water deposits on your oil dip stick. If your oil is clean on the stick but you are having oil leak problems that seem to be coming from the head, check the cam sensor. This is often mis-diagnosed as a blown head gasket and is simply not the case. The cam sensor is located on the right side of the engine just below the head. They seem to have a history of cracking with these engines as was the case with mine.
blown head gasket. the easiest way to tell is to open the radiator cap while the cars running BUT BE CAREFUL! if theres antifreeze in there it will spray and burn you! but if you have a blown head gasket when you open the throttle the same white smoke will blow out of the radiator cap. white smoke is a sign of a blown head gasket though.
Odds are you have blown a head gasket and the antifreeze and oil flow share the same gasket. As the gasket wears, the antifreeze mixes into the oil and vice versa! I suggest replacing your current antifreeze and do a full flush. Test it for a few days and test if you have oil again. A tell tell sign of a blown head gasket is black smoke (burning oil) or white smoke (burning antifreeze ) coming out the exhaust.
Thick white smoke from the exhaust is a pretty good sign
A blown head gasket will not show up on a diagnostics test but can show itself through the readings of several different sensors. The sensors will tell if anything is wrong with the airflow, coolant flow, or fuel flow of the engine.