Question about Audi A6

1 Answer

How accurate is the chemical test done on vehicles to determine if head gaskets are blown?

Posted by on



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 10,865 Answers

Hello. This test is generally reliable. Get a chemical test kit from the auto parts store. It will show if there's presence of combustion gases in the cooling system.

NAPA carries this one under Balkamp # BK 7001006 -

Sometimes you need to get the engine up to operating temperature for a little while before a crack will open up.

Posted on Jul 18, 2010

  • Yuri Grant Roper Jul 18, 2010

    Other than removing the head for repairs, is there another solution like maybe Loctite Block and Head sealer and how effective is it? Are there also other sealants one can use?



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

What is a simple chemical block test to confirm a head gasket issue?

Well now, that's a quetion with many answers but here are a few videos for the DIY or Do It Yourselfer... The second one might be more descrptive but both are answers.

Dec 06, 2016 | Cars & Trucks

1 Answer

I have water in the engine oil. Could it be a water pump seal or a blown head gasket?

When you say that you have water in engine oil, do you mean that you have coolant mixed with oil ?
In order to determine if it's a seal or head gasket, you will need to perform a few tests. Cylinder leakage test on each cylinder can be done to determine if the head gasket is bad. When it comes to the water pump seal, if this was the problem, the coolant would not be mixing with the engine oil.

Nov 24, 2016 | Cars & Trucks

1 Answer

Pontiac g6 ran hot and won't start.

Have a compression test done to determine the extent of engine damaged from the over heating. I suspect that the compression will be very low from ring failure and the heads cracked or blown head gaskets from warped head/s. When this happens the prognosis for damage is not good.

Feb 14, 2014 | Pontiac G6 Cars & Trucks

1 Answer

1999 CE Lancer leaking water into sump

The Best And Easiest Way Is To Take the Head Off And Have Head Pressure Tested Welded Or Replaced Fit New Head Gasket And Repaired Replaced Head You Are Done.

Mar 31, 2013 | Mitsubishi Lancer Cars & Trucks

1 Answer

Oil in the water resevoir

Well phyllis it could be several things like a blown head gasket,cracked block,warped head or intake manifold gasket leaking.You need to have your mechanic do several test to determine what the problem.Needless to say its going to be exspensive to fix.

Jan 14, 2012 | 1999 Cadillac Catera

1 Answer

I have a 98 Ford Expedition, shut off on its own while driving down highway after check engine light started blinking, started back up right after. Got home, Coolant smells like gasoline. What could be the...

Perhaps a blown head gasket. It takes a fairly good misfire for Fords computer to actually flash a code. A blinking check engine light indicates a cylinder or multiple cylinder misfire. The fact that you smell gasoline in the coolant AND your check engine light is flashing leans toward a blown head gasket. I'll explain: When a head gasket blows between a cylinder and a coolant jacket (port coolant runs through to keep engine cool) that coolant can now enter into the cylinder chamber and the fuel and exhaust can also enter into the coolant system.Your coolant system can be pressurized up to 16psi under normal driving conditions so there is quite a force there and if there is a place for that coolant to go, it will find it. When coolant enters into the cylinder it creates a misfire. (water mixed with fuel and air does not make a very good ignition source) So then on the exhaust stroke, it can then expel this fuel/water mix back into the coolant system by way of that blown gasket, during an exhaust stroke the pressure is well beyond the 16lbs of your coolant system and can then force its way back in. This would explain a flashing light and the smell of fuel in the coolant. But for it to die while driving down the would have to be misfiring on more than just 1 cylinder or there is a separate issue on that one all together. With a head gasket blown between the coolant port and the cylinder, you may not see a visible leak from the outside. In this situation one would look at the coolant for signs of floating oil or carbon, pull the oil dipstick and look to see if it is a milky brown color, bubbles also indicates water and/or use a chemical test. You can't pick that up at walmart though. But this chemical test would be a blue chemical placed into a clear cylinder or tube with a suction ball at one end. You remove the radiator cap, start the vehicle then place this tube over the spot where the cap was. Must not let it make contact with the coolant though. Squeeze the ball several times, this draws in air and/or vapors. IF the blue chemical begins to turn yellow it has detected exhaust gases in your coolant system confirming a blown head gasket. Sorry so lengthy...hope it helps.

Jan 07, 2011 | 1998 Ford Expedition

1 Answer

Blown head gasket, sudden engine lope blowinmg huge vapors out of exhaust. Is there a chance the loping engine is cause by broken gasket and would it be worth attempting RXauto head gasket repair before...

Have you diagnosed the problem to be the head gasket, or are you guessing.

What are the symptoms.

I would be carrying out a compression check, and cylinder leakage test on all cylinders.

If it is a blown head gasket, it will need replacement, don't bother with any dodgy chemical sealer, it will not work.

Feb 24, 2018 | 1995 Volvo 850

1 Answer

I have coolant on my oil dipstick is it intake or head gaskets

I would suspect a blown head gasket. STOP driving the vehicle immediately or serious engine damage will occur. Drain the oil and change the filter. The head itself may also be cracked. A compression test will determine if the head gasket is blown or the head is cracked. Take it to a trusted mechanic for diagnosis and repair if he is close by. If not have it towed in for repair.

Nov 16, 2009 | 1999 Chevrolet Venture

2 Answers

Oil in over coolant tank

If there is oil inside the coolant liquid that is the head gasket.

Check first if oil can leak into the coolant tank from the cap.

Usually when you get oil into the coolant liquid you have an head gasket problem, do a compression test, or buy the home tester below. Guides - HOW TO TEST FOR A FAILED HEAD GASKET
Head Gasket or Combustion Leak Test Procedure (Gasoline Engines Only)
Blown Head Gasket? how to check

Feb 17, 2009 | 1996 Chevrolet Monte Carlo

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

67 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audi Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers


Level 3 Expert

81400 Answers

Thomas Perkins
Thomas Perkins

Level 3 Expert

14423 Answers

Are you an Audi Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides