Chocolate mousse in expansion tank

[ceejay]

Hi All,

Just taken the cap off the expansion tank after a track day and found chocolate mousse like stuff in the cap and the top of the tank........... probably a head gasket.hopefully not something more sinister. Any one here had this????

I've checked the oil.....bang on the level and it looks clean enough.

Ceejay

[mudstud]

Snap,same problem. Joolz said I should speak to Team Proactive in Birmingham. Spoke to them and they said head gasket but problem is rare. Flushed system to see if problem re-occured, it has, so guess its time for trip to Pro-active. They estimated +/- a grand assuming nothing more major. Let me know how you get on with your investigations.