Very likely to be the thermostat on these.However it is not a 10 min job on this engine.The t/stat is part of a housing assy that requires removal of the power steering pump and other parts for access.Allow around 2 hours to complete the job.

Edited by elekie&a/c doctor on 26/04/2015 at 21:08

my car runs fine but temp guage hardly moving,then it could be after 40 50 miles temp guage showing normal then goes back to cool,it does this every so often,when I put heater on or check engine by hand it's only I would say hand warm.As I've said it's running fine,but noticed tick over a bit fast when showing cold on guage then down to about 700 revs when guage decides to work. ANY IDEAS,or will I go ahead and put new stat in.

I had the exactly the same issue and i just had to live with it, the only issue i had was the car never warmed up in the winter and i never had any heating. You can drive with it dont think it will cause any problems. Mine was like it for 3 years.