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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 7711  
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1. not alot
2. not great, too much pressure 3. yes but very minimal as water pump speed increases. if you can feel/see it then its prob full of gasses and head has gone. Cheers James 110 XS Utility 130 Puma Station wagon/camper (in the making) 90 Puma Hardtop |
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4th Oct 2023 10:25am |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4410 
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Balls. If the cap is still hissing after a run then you should get yourself a Dr Head Gasket test kit. It is the only one that diagnosed Miffy's head gasket failure.
https://www.drheadgasket.co.uk/fx-53-advan...dgasket-uk I even had a garage do a HG test and it came up negative, so yes I trust this tool. IIRC it took about 15-20 mins of running for the fluid to begin to change, it was a very subtle leak. Whilst you are testing it would be worth going around all of your coolant hoses and clips to check for white-ish staining or hardened rubber. |
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4th Oct 2023 10:27am |
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| bear100 Member Since: 22 Mar 2010 Location: South Wales Posts: 1874  
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Just looked at the head gasket kit, pretty reasonable to be fair. for the sake of £40 i just ordered it.
i have found some white staining on the hose behind the water pump just now and the hose does look overtightened, would this cause issues? 2016 Range Rover Autobiography 4.4 TDV8 2010 110 XS Utility 2.4TDCI 2010 Range Rover Sport TDV8 (gone) 2007 Discovery HSE TDV6 (gone) 1993 110 csw 200 tdi (gone) 1994 90 HT 300 tdi (gone) 1994 discovery 300tdi (gone) 90 hybrid 3.5 v8 (gone) Range rover bobtail 3.5 v8 (gone) |
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4th Oct 2023 7:10pm |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4410
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Yes that hose is suspect for sure. worth either replacing it or the clamp as a minimum.
The coolant tester is as a minimum a good thing to do even if it just puts your mind at rest. |
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4th Oct 2023 7:14pm |
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| bear100 Member Since: 22 Mar 2010 Location: South Wales Posts: 1874
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Dr Headgasket kit arrived today, tried it out and the fluid turned yellow after a while and a
few pumps 
So i certainly have exhaust gasses entering the coolant tank (so the kit says which i am led too believe is pretty much fool proof). So is it the head gasket or the EGR cooler? spoke to my mechanic mate (old-timer) and he says its quite rare for a head gasket to go on the transit engines and to look into the EGR cooler first. is there a way of testing it? My EGR has been disabled with my BAS remap and if the only way to test the cooler is to replace it should i blank anything off at the same time or delete the EGR cooler altogether?  2016 Range Rover Autobiography 4.4 TDV8
2010 110 XS Utility 2.4TDCI 2010 Range Rover Sport TDV8 (gone) 2007 Discovery HSE TDV6 (gone) 1993 110 csw 200 tdi (gone) 1994 90 HT 300 tdi (gone) 1994 discovery 300tdi (gone) 90 hybrid 3.5 v8 (gone) Range rover bobtail 3.5 v8 (gone) |
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6th Oct 2023 5:44pm |
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| Ianh Member Since: 17 Sep 2018 Location: Essex Posts: 1796
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Remove the coolant hoses from the EGR cooler, join them together, top up the coolant and then see if the symptoms go and then do another RELD test .
That should prove if it’s the cooler causing the problem. If it is then keep the coolant hose bypass in place and blank off the cooler at it’s input and the EGR output as well. Note:if cooler were the issue I would have expected some coolant loss but worth doing above to confirm ether way |
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6th Oct 2023 5:56pm |
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| bear100 Member Since: 22 Mar 2010 Location: South Wales Posts: 1874
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Blanked off the EGR cooler pipes and carried out another RELD test but the fluid still turned yellow after 10 mins
So I’m looking at a new head gasket 
Is a head gasket a DIY job? My mechanic friend said you overhaul all your brakes, change all your bearings and always repair it yourself then you should be able to do the head gasket it’s just nuts and bolts. I always try to fix my Defender where I can it’s not a money thing, me and my son do our fair share expeditions and the more I work on it the more chance I will have at a roadside breakdown. I’m pretty good with most jobs but it does sound daunting! If not a DIY can anyone recommend a good workshop in South Wales? 2016 Range Rover Autobiography 4.4 TDV8 2010 110 XS Utility 2.4TDCI 2010 Range Rover Sport TDV8 (gone) 2007 Discovery HSE TDV6 (gone) 1993 110 csw 200 tdi (gone) 1994 90 HT 300 tdi (gone) 1994 discovery 300tdi (gone) 90 hybrid 3.5 v8 (gone) Range rover bobtail 3.5 v8 (gone) |
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7th Oct 2023 4:02pm |
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| Jerry Member Since: 13 Nov 2015 Location: Cardiff Posts: 174 
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If you need a workshop I use HBH in Caerphilly- I think they are good.
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7th Oct 2023 9:21pm |
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| bear100 Member Since: 22 Mar 2010 Location: South Wales Posts: 1874
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Update!
The test was bugging me for some reason, so today i decided test the fluid in air only and after around 20 pumps the fluid turned yellow (well ish) certainly not the purple colour it started out as. So this time i decided to read the instructions and followed them to a tee! ran engine for a few minuets until warm, add fluid to tester, insert into tank, pumped 6 times slowly with 5 second intervals........ didn't change colour not a bit, left in tank for 5 mins, revved engine a few times with no bubbles and then pumped a few times..... no change! Out of curiosity i pumped it near the exhaust and after 2 pumps it turned bright yellow! So i think my head gasket is ok? will try again after a good run and HOT. But what else can cause the coolant tank to discharge but not over heat? 2016 Range Rover Autobiography 4.4 TDV8 2010 110 XS Utility 2.4TDCI 2010 Range Rover Sport TDV8 (gone) 2007 Discovery HSE TDV6 (gone) 1993 110 csw 200 tdi (gone) 1994 90 HT 300 tdi (gone) 1994 discovery 300tdi (gone) 90 hybrid 3.5 v8 (gone) Range rover bobtail 3.5 v8 (gone) |
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9th Oct 2023 6:33pm |
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