Okay let me start off 93 NA manual. Did coolant bypass 6 months ago that's the only mod. Starts to overheat after 20 min of driving. Overheats even fast if AC is on. Changed water pump, thermostat, coolant temp sensor all OEM. changed the fan clutch not OEM but is working. Also used the Datascan and shows that I am at 5 degrees advance in my timing. I don't think that would effect the overheating but I don't know were is to go. Also just to let you know flushed coolant burped all is well. For some reason I can't find the adapter for the radiator to pressure test it but I'm not leaking coolant any were. Don't have head gasket leak as far as I know it. ANy help will be great

 

do a compression test, could still be a head gasket

 

Set the timing back to normal. How do you know you are getting hot? Is your thermostat stuck closed are any of the hoses collapsing? Is there a bunch of crap between the radiator and the condenser? Is there a bunch of crap blocking the radiator in the front? Is the fan pulling air towards the motor or pushing it though the radiator?

Why the hell did you make a new thread?