Hi All, I think I may be starting to get a problem with my jeeps cooling system, (1996 xj 4.0) I fitted a new water pump some months ago and all has been well untill this week, Whilst driving back from Weymouth this evening the engine water temp was going up to around 110 and then droppping back to 90 before sitting at 100 for a few min before repeating the up and down, the air temp was a cool 6dg and I was in clear traffic doing about 50 mph, I am not using any water or oil and cant see any leaks or blockages on the rad, also whilst sat at traffic lights the temp went up to 130/140 and the elec fan came on but the temp did not drop back untill we started to move again, If any one has any idea what might be causing this I would be most greatful as I like to nip this one in the bud before it fails big time.
Just to add, I have had no loss of power or missfires
