All right guys. I’m working with my dad who’s an old school mechanic and help with the O’Reilly guys. O’Reilly guys told me to buy the blaster spray to get the rust off and I’ve done that. Tried a vise grip to try to turn the screws manually with no luck. Any other ideas??
try the blaster spray and tap the studs in hopes that it will help penetrate the treads. you can try to heat up the studs and try melting a crayon in the threads. using lots of heat and using vise grips back and forth to break it free should work. use lots of heat dont be shy
conspiracy_troll is right, if you have an welder thats the easiest solution
if you have a welder… screw some 5/16-18 nuts on the remaining studs and then weld thru the middle… this should allow you to get them out…
you may end up using a propane torch to heat the manifold slightly… use care that you don’t heat up the intake so much to damage the intake manifold gaskets…
lately i have been using Hylomar or Permatex 85420 flange sealant on the thermostat bolt and water pump bolt threads…
best of luck… been in your spot before several times over the last 40+ years…