The car is leaking coolant slowly, especially after a long drive, but I have had several compression tests and all show as fine.
It is a Holden (Vauxhall) Zafira and the dripping can be seen about 30cm in behind the passenger wheel.
Any ideas where the problem is and why it is not showing up in a compression test?
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
if you are adding coolant every day then you are experiencing coolant loss
could be from a leaking pump gasket , head gasket or other leaking item
have a compression test done to check for head gasket , cracked head
next have the cooling system pressure tested to find the cooling leak
lastly check the fan, fan relay , fuses and coolant temp sensor unit for correct operation
Many possible causes. Leak can be when you drive, but not show on your driveway. The heater could be leaking into the passenger area, though you'd likely smell the "maple syrup" smell of anti-freeze.
It's also possible that you have a head gasket leak into the coolant, causing the overheating, and blowing some of your coolant out. Get a compression test on the cooling system, and a compression check on the cylinders.
Yes. You could have a leaking head gasket or a crack in the cylinder head. After driving the car for a few days the spark plug should show signs of coolant on the tip. You may want to do a compression test to see if that cylinder is low on compression too.
Unfortunately this will be kind of hard but, it sounds like you may have a blown head gasket depending on where on the passenger car it's leaking? Drive the car get it hot. Leave it running get out and pop the hood. Start looking for leaks. Use a powerful flashlight to help look. If it doesn't leak while you're driving and only after the car is shut off then I'd say you're creating a vacuum in the coolant system, change your coolant cap at that point.
not a complete history in your brief 'sentence', but water from the exhaust is either condensation whick is normal, or you have a blown head gasket or worse (cracked head or block) which is going to be very expensive to fix. If it is not overheating too, you have nothing to worry about, if it is you need to get the car to someone who can do a compression test and cylinder and/or coolant leakdown test to determine the extent of the damage.
there are only three places for coolant to leak.external leak to the outside of the motor,internal leak like a head gasket causing the motor to burn coolant(white smoke out the tailpipe),internal leak(coolant leak into the motor oil.)you say that the head gasket was tested and it was okay then this takes care of burning coolant,however it could be leaking into the motor oil.check the oil level and condition.I would think the tech would have checked this,but check it just in case.if the oil level is good and not thick or white or milky looking then this is not the problem.you could have a leak externally like a hose leaking a frost plug leaking,water pump leaking,this should be checked out by having the cooling system pressure tested a carefully inspected for leaks
check for air in the system,as it will give a reduced water volume to the coolant temperature sender. there is also a fan switch on the rad that turns on the cooling fan,if your fan does not come on it will overheat.
look for green around the coolant sensor,as it mayn be leaking and drawing in air
Ensure that there is no leak, checking all the coolant lines and the radiator. If there is no leak and the car is consuming coolant liquid, then you may have a faulty head gasket. What happens is that the head gasket allows coolant leaking and being vapourised inside the engine. To find out if your head gasket is starting to go you can perform a compression test.