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| rallysteve Member Since: 10 Feb 2014 Location: Cumbria Posts: 2196   
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Have the garage confirmed that there are not combustion gases/products in the coolant system? 02' 110 TD5 Double Cab Rebuild Thread
84' 90 3.9 V8 Caged Pickup Build Thread - Now For Sale Mobile Diesel Heater Build Thread |
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27th Jul 2022 2:16pm |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4392
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When everything is back together run it up to temp, have a look in the expansion tank for tiny bubbles. You may need a torch. My garage was positive that it wasn't the head gasket as well. In the end in a fit of frustration I used a test kit by DrHeadgasket... Positive for combustion gasses... When I took the head off the gasket was just, just stained through to the water channel. It was enough however to pressurise the coolant system and cause the coolant to explode out of the pressure cap on the A55 near Colwyn Bay. https://www.drheadgasket.co.uk/COMBUSTION-...DGASKET-UK It is a sensitive tester but you may need someone to press the accelerator pedal to get enough gas in to the expansion tank whilst keeping the tester sealed in the tank. Odd that the pump blades are eroding though. What brand did you fit and what coolant did you use? |
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27th Jul 2022 2:27pm |
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| Ali130 Member Since: 13 Apr 2014 Location: Northampton Posts: 8
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No exhaust gases present.
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27th Jul 2022 2:29pm |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4392
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Have you personally tested the coolant for exhaust gasses? or was it your garage? Excuse the question, over the years I have an utter distrust of garages
If the coolant system is not over heating, so not over-pressurising due to it then the only other cause is a foreign fluid or gas being injected/sucked in to the system to eventually over-pressurise the coolant system. That being the case it is either exhaust gasses or air being drawn in to the coolant system via another seal or plug. Have you tested your expansion cap opening pressure? How is the large screw plug under the exhaust manifold, these do spring leaks and might allow air to be drawn in too. If these are all A-OK then I would be taking the head off as it is the only other thing that could cause the over-pressurisation. Using it as an excuse to do the injector seals etc. |
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27th Jul 2022 2:50pm |
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| rallysteve Member Since: 10 Feb 2014 Location: Cumbria Posts: 2196
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As it is a 15P engine bear in mind that a crack in the EGR cooler can also pressurise the coolant via exhaust gas too. 02' 110 TD5 Double Cab Rebuild Thread
84' 90 3.9 V8 Caged Pickup Build Thread - Now For Sale Mobile Diesel Heater Build Thread |
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27th Jul 2022 8:58pm |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4392
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Absolutely right Steve. I had forgotten about that as I have removed mine. I suppose it would be the same with the fuel heater as well... Those o-rings flattening...
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28th Jul 2022 9:27am |
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| Rabbitwabbit Member Since: 31 Mar 2021 Location: Blackpool Posts: 38 
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I had a problem with an overheating Range Rover - and eventually that was traced to a blocked oil pickup pipe - which was causing the top of the engine to be starved of oil, thus overheating and massively heating up the coolant as a result. The effect was to pressurise the coolant system to a degree where it would blow the top hose off! ----------------------------------------------
1997 Land Rover 110 1981 Range Rover Monteverdi Design Study 1974 Range Rover 1959 Series 2 (Now sold) 1971 Range Rover (Now sold) 1973 Lightweight (Now sold) 1981 Range Rover 4 door (Now sold) 1957 Series 1 LWB (Now sold) 1973 Range Rover (Now sold) |
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28th Jul 2022 10:36am |
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