My escort is overheating it's a mk4 RST lump near standard. Tried loads now new water pump as old one the belt was rounded the wrong way and it was spinning backwards. New thermostat cool running one as previously had none. New temp sender it already had an airtek rad with silicone hoses. I'm thinking hg but in denyal tried bleeding it twice now and seems to be fine. Not actually had it boil over since new water pump but it gets to the top of the gauge. So don't want to risk it. Fan is constantly on also as perm live. Heaters are always hot when on aswell so no airlock there but they make no diffrence to the cooling on or off really. No sill bug intercooler in front of the rad either.