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Hot!986 Boxster coolant leak

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johnc106
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johnc106 PCGB Member
2023/09/30 16:15:11 (permalink)

986 Boxster coolant leak

Hi
My 986 Boxster lost all its coolant after a 45min drive. It seems to have come from the area under the coolant tank. I re-filled the tank and it held its level. I started the car and let it idle up to temp, and again it held its level. When I drove the car it lost coolant again. 
Has anyone experienced this or have any clues please.
 

6 Replies

CLIFFWILKINS
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Re: 986 Boxster coolant leak 2023/10/01 08:31:55 (permalink)
Try a new coolant cap. first cheap option to try.
But sounds like if its leaking under the tank it's a new tank.
Good luck
post edited by CLIFFWILKINS - 2023/10/01 08:33:38

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johnc106
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Re: 986 Boxster coolant leak 2023/10/01 09:17:48 (permalink)
Hi Cliff
Thanks for your help.
I tried a new cap and the problem is still there. Sounds like a new tank is in order 🙁
CLIFFWILKINS
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Re: 986 Boxster coolant leak 2023/10/01 10:38:20 (permalink)
Yeah afraid so.
Best of luck with the fix.

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Motorhead
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Re: 986 Boxster coolant leak 2023/10/01 12:38:26 (permalink)
Hi Jonathon,
 
Before you go to the expense of replacing the expansion tank I’d be inclined to run a pressure test to ensure that it’s the tank that’s leaking and not just pipe in that area. Any competent garage should be able to do this for you at minimum cost.
 
It’s rather odd that you only lose the coolant when driving the car rather than at idle, which would indicate maybe that it’s a flow [pump-related] rather than a temperature issue?
 
Jeff

987.2 Cayman S
North Beds (R10 & R24)
johnc106
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Re: 986 Boxster coolant leak 2023/10/01 16:11:29 (permalink)
Hi Jeff
Thanks, will do. The engine temp is always normal which is strange.
I am going to ask the guys at Autostore to check it out for me.
I will post when it’s fixed for info.
johnc106
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Re: 986 Boxster coolant leak 2023/11/05 20:41:44 (permalink)
Hi
It took some time to get the car looked at, and they found a fracture in the water pipe. Hopefully now fixed 👍
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