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Coolant leak on Audi Q7


Posted by Anonymous on


6 Suggested Answers

  • 2 Answers

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

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Posted on Jan 02, 2017

  • 34 Answers

SOURCE: can't bleed coolant system on Audi A3!

In my experience with Audis, after any job requiring changing/draining the coolant the car ideally needs to be driven. With the coolant topped up to max drive the car, keep the revs up and shake the car with steering and over bumps where possible. Whatever you do make sure you take at least 2 litres of water/coolant with you, as as soon as the air lock goes, the level drops a lot and quickly. Also keep an eye on the temp gauge and avoid letting it go much over 90 degrees (over 90 on the gauge usually means its well into the hundreds) When you get consistant hot air through the heater, at idle, the level should of settled. If this doesnt work you may have thermostat issues or a blockage. Good luck, let me know how you get on.

Posted on Mar 26, 2009

  • 297 Answers

SOURCE: Audi A4 2.5 V6 TDI - Creamy grey coolant in expansion tank

Sounds like blown head gasket (or worse) still to me.
Remove oil filler cap and look for grey oil.
Never use water these days but special coolant. Water makes vapour spots and cause block cracks, worse then blown gaskets!!!
vapour does not cool very well.
Look like you have cracks already.
Take a compression test if possible. But might not show op at that temperature.
The gauge indication troubles me.

Posted on Apr 14, 2009

  • 534 Answers

SOURCE: 99 deville head gasket leak?

A head gasket leak is usually indicated (among other things) by continous overheating of the motor, and subsequent loss of coolant.
It can also be indicated by the presence of engine combustion gas bubbles in the coolant resevoir.
Ensure the coolant system has no external leaks, such as faulty hose/s, radiator etc.

Ensure motor tune or other motor mechanical condition is not the cause of overheating.
I assume the motor is actually running hot.

Check cooling fans are operating ok (as necessary when car warms up):- if not check
1) fuse,
2) relay operation,
3) heat sensor switch.

Check/replace the thermostat,
Check the coolant pressure cap is serviceable & of correct rating,
Ensure cooling system is correctly filled, bleed off any airlocks as necessary when re-filling,
Ensure radiator hose on suction side of waterpump is not collapsing at engine revs above idle (due softening),
If the motor has been severely overheated, the head gasket could be blown - look for combustion gas bubbles in the coolant resevoir.

Posted on Sep 21, 2009

Testimonial: " car is not overheating.only had to pull off road does get to 233 sometime."

  • 4340 Answers

SOURCE: Low coolant light was going on and off...filled

There could be a leak, to find out you must pressure test the cooling system. Also test the cap.

Posted on Sep 28, 2009

  • 1 Answer

SOURCE: Head gasket is damaged. 2005 Nissan Sentra, 1.8

i have a 2005 1.8 nissan sentra.i rplaced the radiator becuause it was when i did i took it for a test drive and the needle went to hot then back down to middle ways between the C & H BACK IN i replaced the thermostat. now as far as i can tell it is staying in the middle of C & H. i can't feel no water though cerulating through the top or bottom hose of the radiator. so now that i told you what i done so far my question is???? ( my heater is not working in the car it is blowing out cold air & i left the car runnng for about 45 min. even took it up and down the road.still cold air.what do you think i need to do?????????? )

Posted on Jan 07, 2010

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Sounds like you have either a leaking intake manifold gasket or a leaking head gasket... either way.. its time for a Qualified Professional...

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Hi Audi Experts, how can i solve P2195 and P2099 codes on my Audi Q7 3.0tdi?

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What is wrong with pouring a coolant system sealant into the coolant system of an Audi Q7?

Hi, this is only a quick fix and the leak will come back maybe when you don't want it too.

Dec 22, 2015 | Audi Cars & Trucks

1 Answer

I noticed brownish oily sludge in my radiator reserviour can. The main oil dipstick appears to be free of water. What should I do?. It's a 2007 Audi q7 4.2 v8 engine.

I would have the coolant checked for exhaust leaking into it. This is a simple test and typically points towards a defective head gasket. Also check the transmission fluid . If the transmission fluid is low and not leaking externally there is a good chance it's seeping into the coolant . This can happen if the vehicle has a combination radiator and transmission cooler.

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I have an A4 AUDI 1.8T my car is over heating , oil is finding its way into the coolant and the fan is not coming on, only when i put on the air condition the two fans come on.I also have an oil leak,...

Oil into coolant is almost always cylinder head gasket problem. Sometimes head cracked, Check if head is "tourqued" correctly. If it is remove and do a top overhaul.

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1 Answer

2000 audi s8 4.2 oil in water . no water in sump and runs on all cylinders smooth . could it be the oil cooler.

Oil in water could be a leak at the cylinder head gasket. Oil pressure is much higher than coolant pressure so oil will more readily push into water passageways than vice versa. The other alternative you have hit on is that it could be a leak from the transmission oil cooler pipes. Check that the pipes enter the bottom of the radiator> It may be that the oil is cooled by an entirely independent cooler rad in which case there is no opportunity for transmission oil to ever come in contact with the coolant. The check the first possibility, from cold start the car with the coolant filler cap removed. Is the coolant agitated, ignition gases are just as likely as oil to blow past the gasket. Next have the coolant system pressure tested at a garage. They will be able to monitor coolant pressure throughout the duty cycle of the engine: no pressure at cold rising to about 7lbs per sqinch when hot. If the coolant pressure spikes to 15lb or more when cold this is sign of oil or combustion gas pressure ingress. If this detected, at best a new gasket is required and maybe a new cylinder head (if cracked).

Oct 07, 2010 | 2001 Audi S8

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