[SOLVED] Water swirl pot

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Last seen: 9 hours 56 min ago
Joined: 23/08/2015

All these threads about sigmas' issues with oil catch tanks and cooling systems makes me glad I got a Duratec! Wink

On a serious note has something changed in recent years? There must be thousands of Sigma engined 7s out there and it seems to be just recently that these things are occurring? 


GulfSeven's picture
Last seen: 1 hour 8 min ago
Joined: 28/12/2020

To round off this thread...

The issue remained after bleeding the system and fitting another cap, and was subsequently diagnosed as an intermittent seal between the cap and the expansion bottle. Williams did a pressure test and a sniffer test to rule out any other problems, then changed the expansion bottle under warranty. It's been fine on the road for the last month and also at today's trackday.

So no need to modify the system Thumbup


Gulf Racing 310R