To determine the failure, you need to remove the spark plugs and get an adapter to screw into the head where the spark plug goes. Then you inject shop air into the cylinder. Then you look for the air leak. It will show in either:
1. The carburetor, this means intake valve.
2. Exhaust pipe, this means exhaust valve.
3. Radiator, this means a head gasket.
4. Oil fill cap, that means either a piston or piston rings.
Friday, May 25th, 2018 AT 2:58 PM