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Coolant leaks

Discuss your latest mods or ideas, and anything to do with the BMW X5 (E53).
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henrym3
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Coolant leaks

Post by henrym3 » Sun Mar 09, 2025 1:36 pm

Has anyone ever bought the o ring kit from USA with complete set of o rings for all the coolant pipes. About £30 with post. Way cheaper than buying complete pipes. I have various weeps especially round the g/b thermostat and header tank. Very minor (cup full of coolant per fortnight) but very irritating.

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henrym3
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Coolant leaks

Post by henrym3 » Tue Mar 11, 2025 3:35 pm

Well, I’ve sent for them anyway all made in Viton. £28 so we’ll see what effect they have. I’m into rubber atm just sent for a set of seals for the single vanos on the Alpina. With a bit of research I found that the cam locking kit and crank locking tool from when I did the chains on the 4.6 all fit the Alpina.

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henrym3
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Coolant leaks

Post by henrym3 » Mon Mar 17, 2025 4:26 pm

They arrived today, that’s quite quick for stuff from the USA. Just need to find a good day to fit them and sort a weep on the thermostat housing.

Themoog2
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Coolant leaks

Post by Themoog2 » Fri Apr 25, 2025 10:27 pm

As an add on to this thread I've recently had the thermostat changed in my V8. Two days ago the waterpump front seal gave up and the radiator had been leaking slightly at the bottom right anyway. Just had it all done £660..
I haven't had chance to give it a proper run to check for leaks yet but I have a funny feeling there is a small weep down by the Tranny cooler. We will see.

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