Coolant pressure update !!!

Morning peeps,,

right after a bit of googling and not been able to get sniff test due to they can’t do a diesel lol,,

I searched tinternet and came across some guy that said to check the pipe from the top radiator hose that goes back to the expansion tank as inside there is a valve or something that gets blocked and won’t allow air stuck in coolant to escape my pipe was blocked so I unblocked it filled back up left cap off and let the fans kick in 3 times to make sure I’d got out the air,, I now only have minimal pressure in a morning when I release the cap and the temp gauge now takes a lot lest time to read 90 degrees,,

this is the pipe it goes behind the air intake and the air box you can just see a slight hump in the pipe where valve is,, I’ll keep an eye on it for a while but hopefully this has solved my issue 

thanks peeps