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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5700  
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I think there is a good chance you are having cylinder head issues. I’m trying to remember when they stopped using plastic locating dowls.
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30th Nov 2021 9:03am |
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| donmacn Member Since: 06 Nov 2017 Location: Nth Scotland Posts: 1841 
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I think a blown cylinder head gasket might be possible - so that pressure from the engine/pistons is getting into the coolant system and over-pressurising it.
The ‘hot then cold’ thing - I’m not sure if the Td5 is the same, but with the Tdi, if you lose enough coolant there can be an air bubble around the sensor. This means it reads cold - the opposite of what the engine is. A pressure test might be an idea. Donald 1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong (The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html ) 2000 Range Rover P38 4.0L V8 in the past.. RR classic - fitted with 200Tdi 1984 RR classic - V8 with ZF auto box 1993 Discovery 300Tdi not to mention the minis and the Type 2 VW camper... |
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30th Nov 2021 9:08am |
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| rallysteve Member Since: 10 Feb 2014 Location: Cumbria Posts: 2227  
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Yours will certainly have plastic dowels. Most places you read say that they stopped using plastic dowels when the 15P engine came in with the 02' face-lift. My 02 15p had (broken) plastic dowels still though. 02' 110 TD5 Double Cab Rebuild Thread
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30th Nov 2021 9:30am |
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| 4RF RDS Member Since: 19 Jul 2015 Location: Ottawa Posts: 933  
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Yup 1999 has plastic dowels unless they were already changed. I believe the change over to metal dowels was sometime in 2002. Regardless, sadly, sounds as though you have a blown head gasket. Stop driving it and get to work.
Good luck. 2010 Range Rover MkIII Autobiography Super Charged (Idris) 2003 Range Rover Mk III (Desmond FitzWilliam) 2000 Defender 110 CSW TD5 (CTX) 1992 Range Rover Classic (Lizzy) 1972 Series III 300 Tdi (Stanwood) 1967 MGB GT Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats. H. L. Mencken (1880 - 1956) |
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30th Nov 2021 4:32pm |
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| A.Rubio Member Since: 04 Mar 2017 Location: Rocafort -Valencia Posts: 30 
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Hello, good night, the 10 P motor sure, no, it sure has plastic centering pins, but there is also another problem and that is that the thickness between the water chamber and the valve seats of the cylinder head is ridiculous, with this I do not want to say that all the cylinder heads go through that place, but 80% of them the water comes out there and in the cylinder nº1; do not think about putting a cylinder head manufactured by the original Land Rover supplier, if you have to put a new one that is AMC. I had to do 4,500 km from the desert to home, spending 1 liter of water every 250 km. That is, with the expansion tank cap open a little so that it could breathe and not burst a hose.
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30th Nov 2021 8:20pm |
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| diesel_jim Member Since: 13 Oct 2008 Location: hiding Posts: 6092 
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Definately head problems, either gasket or more than likely a crack in the head.
I had a 10P engine I'd built up from bits and it did exactly the same thing... was fine if I drove it gently, as soon as I gave it the beans a poo'y brown sludge came out of the header tank (emulsified oil) and the heater always blew cold. eventhough the temp guage showed OK. I tried getting it skimmed but you could see the crack in the face of it. got a replacement head for a couple of hundred quid (second hand) and it sorted it. I put some washing powder in the coolant and ran it for a while and kept flushing it through (with more washing powder) and cleaned the old oil out of it. |
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30th Nov 2021 10:00pm |
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| Leamreject Member Since: 19 Dec 2020 Location: Middle Earth - Leamington Spa Posts: 970  
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Check to see if you have oil in the coolant or coolant in the oil. Either is a sign of head or gasket problems. Ride like you stole it!!
If I’m not on a bike it’s because only a 4x4 will do… 2011 2.4 Puma 90 HT |
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1st Dec 2021 3:16am |
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