hi folks. after fitting a mocal oil cooler and accusump + 1 way valve (after oil cooler) the cooler stays ice cold. i'm using a thermostatic sandwich plate. i'm sure there is a fair few people using this setup either with or without accusump and does your cooler stay cold or does it warm up a little. i'm confused a bit because i had this particular cooler installed once before not for long though and i remember it warming up a little.perhaps i don't understand how it all happens maybe 1 way valve makes he difference i'd like to mention that all connections are ok and 1wv seems to flow too. clueless