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10th March 2022, 13:51 | #1 |
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Rover 75 Join Date: Sep 2018
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Water top up
My 1.8t has needed topping up with about half a pint of antifreeze about every 100 miles. The headgasket was done about eighteen months ago. Could there be any other reason than the head for this leakage? I can't see any obvious leaks. Would welcome opinions.
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10th March 2022, 14:32 | #2 |
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ZT260 #243 (resting) Join Date: May 2010
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Possibly inlet manifold gasket. Leaks when the engine cools down allowing a little coolant into the cylinders which burns off once the engine starts. The leak itself seals once everything warms up and expands. Is there any evidence of a misfire on start up or steam from the exhaust which disappears after a minute or so. Check the spark plugs as well, if one (or more) is exceptionally clean its evidence of any leaked coolant burning off, effectively steam cleaning the plug.
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10th March 2022, 14:43 | #3 |
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mg zt-t 226th made from total of 396 Join Date: Nov 2019
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check the cap on the expansion tank first. the rubber/ plastic sealing rings can get aged quickly and allow coolant to overflow. new cap from German supplier stopped my problem for £ 12.00. second check for signs of dried coolant around all water pipes especially near jubilee clips that get over tightened.
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10th March 2022, 14:55 | #4 |
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Water top up
The manifold gasket was replaced when the head was done and I've replaced the radiator cap!
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10th March 2022, 17:20 | #5 |
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10th March 2022, 17:27 | #6 | |
This is my second home
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Quote:
Next, is it the original plastic manifold because they can become distorted. |
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10th March 2022, 19:56 | #7 |
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mg zt-t 226th made from total of 396 Join Date: Nov 2019
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Yes filling above the bottom of the fins will get expelled till it gets to that level ( my first mistake on getting my ztt ) it feels strange at first leaving it looking so low but if there are no leaks it will stay that way . worth checking that when the head was done the system was bled to remove air ,which can also blow excess out and then leave the system short.
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11th March 2022, 11:48 | #8 |
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That’s a lot to lose! Have a look at the metal pipe that runs around the rear of the block, and the plastic thermostat housing at the end of it, both of those are known for leaking.
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11th March 2022, 14:56 | #9 |
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Water top up
Thanks everyone for the advice. Will try to narrow down. Wish you lived near Tricky!!
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11th March 2022, 15:21 | #10 |
I really should get out more.......
Rover 75 connoisseur se v6 auto Join Date: May 2014
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Ah yes those were the days when he was in Barton
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She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide. |
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