Thread: BLOWN HEAD GASKET? 2005 Discovery 3 TDV6 S

Thanks for your educated reply. My mother always said better off to be thought a fool than to open your mouth and prove it.
I said maybe and we will confirm later. Trust me $8 - 10 thousand dollars is not just thrown around and a thorough investigation will be made before spending that money. We have spent almost a month now testing and checking. To make your sort of statement is a little shallow so I will offer it that same treatment. Thank you and have a nice day.

The real expense often with these cars is all the labour costs involved in fitting/ replacing etc parts and then often you find there is other issues. A new engine with 12 months unlimited mileage warranty seems to me like a much better deal then fixing up an old engine that may or may not be ok.

My new long engine is now coming up for 12 months old and I'm glad I have it rather than the repaired old one that caused the dealer so many issues once they pulled it apart under warranty. Lucky for me my new engine was supplied under warranty.

I remember reading only a few years ago that some poor sods got charged around the 20k plus mark for replacing TDV6's out of warranty, now you can get it done for about 12k if you shop around.

If you do get a new long engine make sure you get all the hoses, belts and pulleys changed at the same time, I didn't and it has cost me heaps to replace them all over the last 12 months as they have failed one by one. If they had been done when the engine was being changed it would have only cost me the parts cost and no labour.

Don't take offence to much from 400HP, he always likes to get to the point in his own way. ...

cheers,
Terry

Sorry,I didnt mean for you to feel foolish . Its your learned help I worry about.
So ,after a doing full (spectral)analysis of the engine oil ,(both filtered and unfiltered )the coolant and exhaust gas ,the engine oil filter and perhaps a pressure test to see if you havent a block/liner crack , liner/bore corrosion/crack your still none the wiser as to where your losing coolant I too have a TDV6 thats done 180,000K ,and a another owner thats done 450,000 ,that never has had these issues, so Im genuinely interested in what the actual root cause is or was .

The o-ring on the water pump can leak and is near impossible to see when it does, unless it is removed then you can see a stain mark from the leaked coolant.

cheers,
Terry

I dont think Chemiweld will assist blown head gasket. It reacts to cracks and porosity in metals. Why dont you run it for a while and see how you go. I know first hand of examples where chemiweld has lasted for years and and LOT of klms including under towing conditions...

Cheers

Thanks for the comments fellows and 400HPongas I understand your concerns and I would like to come to the exact source of the liquid loss also.

1. We have pressurised the system for 12 hours with paper on the floor and then used high powered lights from below and above the engine and not one sign of liquid loss (both hot and cold).
2.We have removed the water housing that blew on top of the oil cooler at the top of the V and not a sign of water marks or water in this region.
3. I have installed the Chemiweld and done about 500km so far with less than a cup loss of water.
4. To investigate the liners/bore damage it really will need the heads off and at 3 - 4 thousand dollars just to get there I think I will see how the Chemiweld does and if after a few months the water loss has ceased then I either let it be, sell it or decide to fit the new engine and repair and sell the old to recover some money.

This is all in front of me so I will see how Dreamn goes with his diagnosis and watch with anticipation of a simpler or cheaper solution.

Talltales , Have you done a full sprectral analysis of thw engine oil. Ring this mob and see how to get a couple of samples done, 1 of the oil amd 1 of the coolant
ALS Tribology | Tribology Laboratory Testing | Virginia Tribology Lab or
Diesel and Petrol Engine Oils - Oilcheck Pty Ltd

Have they checked EGR coolers yet?

"It's not that uncommon that they fail - the usualy fail mode is cracking. Usually cause a loss in coolant and sometimes a bit of white smoke, but also (if leaking internally) ends up knackering the EGR valve that it's connected to.

It happened to one of the chaps here in Spain last week and many more have had the EGR coolers replaced for coolant loss problems before the valves are affected.

It's just stuck on the input (rear end) of the EGR valve and looks like a cylinder with loads of holes lengthways through it and coolant connections."

DISCO4.COM - View topic - EGR COOLER ???

DISCO4.COM - View topic - Coolant Loss and top up.

DISCO4.COM - View topic - Coolant Loss and top up.