How to test for a blown head gasket on a Jeep Wrangler?
How to test for a blown head gasket on a Jeep Wrangler?
OK, if the prior 3 tests have confirmed that the head gasket on your Jeep 4.0L Cherokee (or Grand Cherokee, Wrangler) is not blown YET your 4.0L Jeep is still overheating and you still suspect a blown head gasket, take a look at the last test: HEAD GASKET TEST 4: Using A Chemical Block Tester (Combustion Leak Tester).
What are the symptoms of a blown head gasket?
The most common symptoms a blown head gasket are: Your Jeep is overheating. White smoke is coming out of the tail-pipe and it smells like Anti-Freeze being cooked. The Jeep won’t start: 1.) You have already verified it’s not an ignition system problem because you have spark coming out at all of the spark plug wires.
Where does the smoke come from in a blown head gasket?
When this happens to coolant burns/evaporates with the combustion process and appears as white smoke coming from the tailpipe. This smoke can be differentiated from moisture during a cold start by a sweet smell and will continue even when the engine is warm.
Where does coolant come from in a blown head gasket?
A head gasket leaking external would cause coolant to come from below the intake or exhaust manifold and often only happens when the engine is completely warmed up.
How to test for a blown head gasket in a Jeep Wrangler?
One of the most common symptoms of a blown head gasket is coolant mixing with the engine oil and this first test will check for that. OK, to get this show on the road, this is what you need to do: Open the hood on your Jeep 4.0L Wrangler (or Cherokee, Grand Cherokee) and once open, pull the engine oil dipstick.
The most common symptoms a blown head gasket are: Your Jeep is overheating. White smoke is coming out of the tail-pipe and it smells like Anti-Freeze being cooked. The Jeep won’t start: 1.) You have already verified it’s not an ignition system problem because you have spark coming out at all of the spark plug wires.
What causes the head gasket to fail on a Jeep Grand Cherokee?
While there are many reasons that your Grand Cherokee’s head gasket can fail, the most common ones have to do with the cooling system causing the engine to overheat. Low Engine Coolant– If there is not enough coolant to properly cool the engine, it’ll overheat and blow the head gasket.
Why does my Jeep Grand Cherokee have white smoke coming from the exhaust?
Related: White Exhaust Smoke Diagnosis: Jeep Grand Cherokee Loss of Coolant – If your Grand Cherokee’s engine coolant level is going down, but there is no noticeable leak, it could be a sign that the head gasket has blown.
