Water leak looks like beteen gearbox and engine could this be a core plug?

You have a leak and have found something under the car?

Does what you have found look like anything in the image below?


If so, that's a core or 'expansion' plug. A core plug fits into a hole at the side or back of the engine block. The photo below shows:


The job of a core plug .. it sits in a hole in the engine block. If there is insufficient antifreeze in your cooling system the water can freeze and literally turn to ice. When this happens the water expands as it becomes ice - and forces out that metal disk, which prevents the ice from cracking your cylinder block. That little metal disk is a form of protection.

They can also corrode and leak.

To find where it came from .. look for where your coolant is leaking from...

Or look at the engine block below the cylinder head at the sides and rear of the engine. You'll probably need a flashlight as they may be hidden by other engine components.

They cost pennies.

Clean the area around the hole and apply a smear of sealant. Push the metal disk- core plug - into place and tap it in the center with a hammer. This will cause the plug to expand and become a tight fit.

thats sounds like a core plug has blownout or rusted through,have to split engine from gearbox to gain access to the rear of engine block but first make sure its not above where gearbox housing butts to engine ie may have a higher core plug or a split hose ,

It may be a leaking frost plug. Some engine blocks have holes needed for the casting of the block or for machining. These are then plugged with cup shaped plugs called frost plugs . These can sometimes corrode and start leaking. Check to see if this is the case and replace plugs if needed. Hope this helps

hi sounds like a core plug at the back of the engine block will need the gearbox removed to renew the the plug

sounds like a core plug has come out that will mean the gearbox will have to come out to replace it.

look if you loose any of those plugs you have coolant loose or oil loose but if you are not loosing noting then the problem is the cloutch bearing is making the noise good luck

If no external leak and the transmission fluid colour looks white, the problem belongs to the automatic gearbox oil cooler. The oil cooler has broke mixing the gearbox oil and coolant causing this milkshake. It's a small radiator core type oil / water heat exchanger. It is cracked inside and transmission oil is mixed with engine coolant. Because the transmission oil pressure is greater than engine coolant pressure, the transmission fluid level drops. See also the coolant colour inside recovery coolant reservoir inder bonnet! It could be like this:



The automatic gearbox oil cooler type oil / water heat exchanger (oil cooler):


(In the picture above the transmission oil pan was removed for oil filter replacement).

yes you got it in one,, its an air lock stoping the water going round the heater, you need to blead the air out rad seal wont block up the heater,,,,iv used it many times,,,my old truck ran with it in for years!
look for a bleed scew on a water pipe and open it with the motor running let water ran out till no air is in it, top up header tank as well

was the prob a hole in the heater hose if there are any back tthere

core plug gone remove gearbox to replace