I had a similar problem with slight coolant loss this spring after a coolant change on my '92 4/4.
Came down to regular topping up as air purged from system over a couple of runs.
A SLIGHT loss from one joint was found early on but tightening the clip solved that, leaving air opurgeing the only problem to solve.
Fresh antifreeze always seems to find weak spots in the system.
I just missed one clip when checking.
The airlocks are now all gone and water constant again.
Giving the car a quickonce over today/tomorrow before heading to Wicked Welsh Weekend on Friday.
Weather looks good so should be a great weekend up in Mid Wales.
Did the Carmarthenshire Run hosted by Whitland Car Club on Sunday and A4069 yesterday as cobweb cleaners in readiness.
