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10th April 2022, 15:59 | #1 |
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Strange coolant loss.
Today I attended the MGOC meet in Hayle Cornwall. Met up with two other cars and we convoyed the 61 miles to the event. Stopped outside the clubhouse and Banana dumped half of her coolant out of the overflow pipe on the catch tank. Lots of steam coming out of the near side edge of the bonnet.
Parked up and looked for the cause. Nothing to be seen on top but underneath, again on the near side, there was water dripping down via the undertray. Left her to cool down for about an hour. Took 3 litres to re-fill. Started her up but left the radiator cap off. No bubbles, no oil in there. Ran the OBD and the temperature gradually crept up to 104 and the fan cut in. Still no loss. Turned her off. Before leaving to come home I checked the level and it had dropped, not much, but down a little. Drove home and she pulled like the proverbial train. Got home with no steam or coolant loss. On the way down, and home I ran the OBD, and the temperature never went over 88. Could it be the PRT? Any ideas?
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233,431. That’s our second meet done, no.3 next weekend. onen hag oll |
10th April 2022, 17:53 | #2 |
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Glad you made it back OK Bob. Excuse my ignorance, but what is the PRT?
Google says 'personal rapid transit'. My best guess is pressure radiator top? |
10th April 2022, 18:03 | #3 |
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Pressure Relief Thermostat sits at the bottom of the radiator on the right. Available in two colours, a buff or a black one. Both work at different temperatures. Mine is the buff coloured one. Last changed 9 years ago.
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233,431. That’s our second meet done, no.3 next weekend. onen hag oll |
10th April 2022, 18:24 | #4 |
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10th April 2022, 19:00 | #5 |
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MG ZT 260, Rover 75 Connie SE auto Join Date: Feb 2013
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Pressure radiator thermostat?
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11th April 2022, 06:54 | #6 |
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Morning Bob
this is obviously a re occurrence of an ongoing problem and if not sorted will lead to a failure of your head gasket , if it isn't the problem already But First things first, With the amount of coolant you have lost your system needs filling from cold and the bottom rail requires bleeding as the chances are you will have entrained air in the system , Once you have sorted that you can then run and monitor the system . Did you ever change your expansion tank cap as a PRT needs a sealed system to operate as it requires a system pressure differential and a failed cap wont support this As for the PRT they come in all different configurations and this has been debated scores of times on here , but I know trikey suggested the PEL500110 Which I know from experience works well with our cars I would personally only buy a genuine Landrover one https://rimmerbros.com/Item--i-PEL500110 I would certainly go down the route of changing the PRT ( particularly as yours is 9 years old) and cap as a starter then monitor the car . Last edited by TourerSteve; 11th April 2022 at 06:56.. |
11th April 2022, 07:01 | #7 |
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I would take the precaution Bob of getting the cooling system fully drained and bled.
Simon
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11th April 2022, 07:56 | #8 | |
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Quote:
Going to phone the garage this morning and get her booked in. Many thanks for the advice.
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233,431. That’s our second meet done, no.3 next weekend. onen hag oll Last edited by FLYING BANANA; 11th April 2022 at 08:58.. Reason: Lack of sleep |
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11th April 2022, 08:57 | #9 |
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Now booked into the garage. The boss thinks it all points to the PRT. I'll get the cap replaced as well.
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233,431. That’s our second meet done, no.3 next weekend. onen hag oll |
11th April 2022, 09:00 | #10 |
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It's the colour Bob, get rid of that yellow primer and paint it blue!
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