Member Since: 26 Sep 2006
Location: ASTURIAS
Posts: 2431
opinions on “miracle” liquids head gasket repair, PLEASE
and… I'll be specific, and I know there are no miracles in this matter...I'll tell you, quickly, my TDV6 D3 engine, mine since new, currently has 360,000 km and it really runs like a cannon...but about 4000 km ago it started to pour coolant liquid through the valve cap of the expansion tank... I throw it when I make a somewhat demanding trip or long trips on the highway at medium or high speed... THE LOW COOLANT MESSAGE HAS NEVER ARRIVED AND THE TEMPERATURE HAS NEVER RAISED ABOVE THE middle point. Since I THINK THE SYSTEM HAS OVERPRESSURE, I don't know why, I have changed the expansion vessel, plug, and recently the thermostat...no result...I only have to think about HEAD GASKET...but I rule out such an intervention because I think it would cost so much or more than the value of the car itself...I don't know much about mechanics, I'm a geologist, and there are my questions: APART FROM THE GASKET, WHAT I THINK ABOUT NOW, ARE THERE MORE ELEMENTS SUSPECTED OF BEING ABLE TO GENERATE THAT OVERPRESSURE? And above all, ARE MIRACLE ADDITIVES REPAIRING HEAD GASKETS EFFECTIVE OR ARE THEY A WASTE OF TIME AND MONEY? I sincerely appreciate any opinion on this matter. Thank you and above all sorry for the long and heavy post!lost in translation!
DISCOVERY 3 SE man. TDV6 2006, my true love!
DEFENDER 2 SE D I6 MHEV 2024, other live.
8th Dec 2023 2:37 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 5044
Snake oil most of them in my opinion and are likely to cause further issues like heater blockages.
You could try a cheap "Sniff test kit" which will detect combustion gasses in the coolant if the leak is significant enough. The other alternative is a more expensive coolant pressure test kit.yµ (idµ - eAµ) ψ=mψ
8th Dec 2023 6:44 pm
sailormike
Member Since: 04 Apr 2007
Location: Norfolk
Posts: 180
Could a leaking fuel cooler cause this? Just a thought.
My stepson’s car had oil in the header tank, this was traced to a leaking cooler not a head gasket, it was a 2.0l C5.Disco 4
Burstner motorhome
BMW 225e (only 1/2 way to electric)
8th Dec 2023 7:08 pm
ruben D3 Decade
Member Since: 26 Sep 2006
Location: ASTURIAS
Posts: 2431
My coolant is completely clean and without a trace of oil at all, the engine temperature is always correct.lost in translation!
DISCOVERY 3 SE man. TDV6 2006, my true love!
DEFENDER 2 SE D I6 MHEV 2024, other live.
8th Dec 2023 7:19 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 5044
Is you radiator fan performing correctly? The other possibility is an EGR cooler which is leaking coolant into the exhaust! You can sometimes detect this by removing the egr pipe to the throttle body and see if it's wet inside the egr valve?yµ (idµ - eAµ) ψ=mψ
8th Dec 2023 8:01 pm
Carl and Petra
Member Since: 13 Feb 2015
Location: Hautes Pyrenees
Posts: 219
You say coolant is coming out of the header tank which suggests overpressure.
This suggests to me a blockage.
I would drain and flush the system. While doing so remove and check the thermostst as it may have failed. It is not a big job, couple of hours. The part is cheap if it needs replacing.
Good luck.
8th Dec 2023 8:20 pm
ruben D3 Decade
Member Since: 26 Sep 2006
Location: ASTURIAS
Posts: 2431
The thermostat was replaced yesterday...and everything is still the same! thanks for your answerlost in translation!
DISCOVERY 3 SE man. TDV6 2006, my true love!
DEFENDER 2 SE D I6 MHEV 2024, other live.
8th Dec 2023 8:42 pm
ruben D3 Decade
Member Since: 26 Sep 2006
Location: ASTURIAS
Posts: 2431
Any reference on the work of head gasket repair fluids?lost in translation!
DISCOVERY 3 SE man. TDV6 2006, my true love!
DEFENDER 2 SE D I6 MHEV 2024, other live.
8th Dec 2023 8:49 pm
Carl and Petra
Member Since: 13 Feb 2015
Location: Hautes Pyrenees
Posts: 219
In relation to your comment on head gasket repair fluids.
I had a Jeep Cherokee XJ that was losing a litre and a half of coolant every few days. I was told that the engine block needed replacing by two garages.
A local retired mechanic told me to buy 'K Seal' . A coolant additive that has microscopic particles in suspension that when added to coolant finds its way into any point where it seeps out.
I added this and after a day the leak stopped. Totally.
Five years on amd zero issues with leaks or any components.
I view this as a superb product. I believe i had a porous engine block and for this the product is superb. I was also awre of a heater matrix leak, this was also repaired by this additive and the heater worked perfectly after as well.
I believe a gasket could well be managed with this if the failure...if there is one is minor but realistically i can not say with any real knowledge.
i will post a picture later.
8th Dec 2023 10:18 pm
ruben D3 Decade
Member Since: 26 Sep 2006
Location: ASTURIAS
Posts: 2431
many thanks for the replies!!lost in translation!
DISCOVERY 3 SE man. TDV6 2006, my true love!
DEFENDER 2 SE D I6 MHEV 2024, other live.
8th Dec 2023 10:24 pm
Globetrotter448
Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1818
If the coolant is being pressurised it could only be a couple of things. The water pump is not circulating the coolant, this can be checked by unscrewing the bleed valves and seeing that fluid is pumped around. The other is that the pistons are creating the pressure through a leak. If this is the case when you stop the engine, fluid would leak into the cylinders eventually contaminating the oil, as can be seen in a white gunk on the oil filler cap or on the dipstick. Are you losing fluid?
9th Dec 2023 2:48 am
Moo D3 Decade
Member Since: 13 Aug 2010
Location: UK
Posts: 14399
My daughter's D3 was loosing coolant. Turns out it's the water pump. D4 HSE EU6 (Known as Jeeves)
New Defender L663 110 SE (known as Noddy!) Sold
Sold Volvo XC90 R-Design (known as Basil)
Sold - D4 HSE (Known as Gerty)
No longer the Old Buses original owner
231,000 miles and counting
05 S manual owned from March 2005
D4 Face lifted
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BAS Remap, Allisport Intercooler and deCat
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T-Max split charge
Hanibal Expeedition rack
Prospeed ladder
Duratrac tyres
IID BT
BAS FBH control
Rubens not sure if this is still available but I have used wonder weld in the header tank for this same issue, it has alwaya worked, but not sure on a engine like the D3.
Flack
9th Dec 2023 10:25 am
Carl and Petra
Member Since: 13 Feb 2015
Location: Hautes Pyrenees
Posts: 219
This is the stuff i used. Yes, it worked. Certainly not snake oil!
Click image to enlarge
Click image to enlarge
9th Dec 2023 12:36 pm
rrhool
Member Since: 28 Aug 2014
Location: Norfolk
Posts: 4521
Have you taken apart an engine that has had K-seal used on it! It's end of the road, get me home, 'I'm going to scrap the car in 3 months just fix it now' stuff .Richard
D3 SE 2007. Triumph 2.5Pi 1973. Ferguson TEA20 1948.
Discovery 2 4.0 ES 2001- Gone
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