The plastic connector part gets brittle with heat and time. A simple pull should do it. Try another plug and spray if needed.
Be sure to blast with air around each GP to remove dirt and broken plastic parts before you remove any GP's. I recommend putting a large pillow over the radiator and lying on that to reach the plugs that are further back. Do one at a time, post your questions as needed.
--Hugh
Be sure to blast with air around each GP to remove dirt and broken plastic parts before you remove any GP's. I recommend putting a large pillow over the radiator and lying on that to reach the plugs that are further back. Do one at a time, post your questions as needed.
--Hugh
