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TB42 leaking coolant into sump overnight?

Tech Talk for Nissan owners.

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Posts: 317
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TB42 leaking coolant into sump overnight?

Post by mhgill »

What could be causing this to happen?

The head + gasket has just been done, (thought it was the head)

But it still drians the radiator into the sump after about 12 hours??????

I would have said oil cooler but its petrol not diesel.....
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Re: TB42 leaking coolant into sump overnight?

Post by jessie928 »

mhgill wrote:What could be causing this to happen?

The head + gasket has just been done, (thought it was the head)

But it still drians the radiator into the sump after about 12 hours??????

I would have said oil cooler but its petrol not diesel.....
pull the water pump off and you will see that where the impellor runs close to the timing cover may be corroded

Jes
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Posts: 317
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Re: TB42 leaking coolant into sump overnight?

Post by mhgill »

jessie928 wrote:
mhgill wrote:What could be causing this to happen?

The head + gasket has just been done, (thought it was the head)

But it still drians the radiator into the sump after about 12 hours??????

I would have said oil cooler but its petrol not diesel.....
pull the water pump off and you will see that where the impellor runs close to the timing cover may be corroded

Jes
THANKYOU! Will look on the weekend....
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Post by mhgill »

Pulled the water pump off today, and the timing cover looks ok (as far as I can see)

What's next? I think i'll have to put the water pump back on, fill it with water and drop the sump off so I can see excatly where its dripping from...?
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98 GU 4500 ST Stock.
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Post by mhgill »

My TB42 does NOT have an oil cooler, but after some research I've found that there IS 2 welsch plugs behind the plate where the oil cooler would normally go that could leak.....

Hopefully its that or a timing cover, otherwise its the block.....
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Post by jessie928 »

mhgill wrote:Pulled the water pump off today, and the timing cover looks ok (as far as I can see)

What's next? I think i'll have to put the water pump back on, fill it with water and drop the sump off so I can see excatly where its dripping from...?
did you take a good look, is it pitted at all? is it cracked?
also the welshplugs that you note MAY also be a possibilty,

Who done the head? did you crack test it properly?
did you check the hex head plugs in the top of the head for leaks or cracks between plugs. is compression good? i have seen someone put a head on and fold the gasket up on one end of the head and bolt it on( leaky leaky)
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