73 340 Compression Test interpretation help
Greetings, All!
I ran a compression test on my 73 340 semi-stock motor (intake & headers). I bought the car used, with 101k original miles, and have no idea about the internals of the engine. It is a numbers matching block, though, with "I" (the letter next to the spark plug, as opposed to the X) heads, don't know the casting number, or their age, but I assume they are stock.
The engine emits blue-white smoke (oil) from a cold start, especially if sitting for a few days. Normally, once warm, it won't smoke, but does smoke under hard acceleration. I warmed up the engine, pulled all spark plugs, grounded the coil, a propped open the throttle. Below are my readings - Dry is normal, wet is with oil poured into the cylinders. I took 2 readings for all but the Dry #2 cylinder, and did not do wet test on #5 or #7, since was too difficult to get around the header!
Please let me know your thoughts.
Greetings, All!
I ran a compression test on my 73 340 semi-stock motor (intake & headers). I bought the car used, with 101k original miles, and have no idea about the internals of the engine. It is a numbers matching block, though, with "I" (the letter next to the spark plug, as opposed to the X) heads, don't know the casting number, or their age, but I assume they are stock.
The engine emits blue-white smoke (oil) from a cold start, especially if sitting for a few days. Normally, once warm, it won't smoke, but does smoke under hard acceleration. I warmed up the engine, pulled all spark plugs, grounded the coil, a propped open the throttle. Below are my readings - Dry is normal, wet is with oil poured into the cylinders. I took 2 readings for all but the Dry #2 cylinder, and did not do wet test on #5 or #7, since was too difficult to get around the header!
Please let me know your thoughts.