What are the symptoms of a bad freeze plug?

If you have water or coolant leaking from the side of your engine or between the engine & transmission, you most likely have a bad freeze plug. Sometimes the hole in the freeze plug is very small, and can periodically be blocked by debris from the cooling system.

Why are they called freeze plugs?

Core plugs are usually thin metal cups press fitted into the casting holes, but may be made of rubber or other materials. The expansion of the water as it froze would cause the core plug to pop out of the engine, leading to the term “freeze plug”.

Will Blue Devil fix a freeze plug?

BlueDevil Pour-N-Go is incredibly simple to use and will permanently seal a leaking freeze plug without having to drain and refill your cooling system or ever crawl under your vehicle.

What is the correct timing for oiling a 455 block?

If your block is grooved, most recommend that the oiling hole is between 1PM and 3 PM orientation as viewed from the front of the block. A factory Olds 455 block has the oiling hole at 6PM. Cam Timing was set to 0 degrees, no advance or retardation. Ignition timing is set at base timing of 10 degrees, and a conservative mechanical advance.

How much clearance do you need for a 455 engine?

0.001″ of main or rod bearing clearance for each inch of journal thickness. This would be 0.003″ clearance for an olds main bearing clearance, and 0.0025″ clearance for rod bearings. 0.004″ of ring gap per inch of cylinder bore diameter for a factory motor. This equals 0.0165″ ring end gap for an OEM Olds 455.

What is the clearance on a stock Oldsmobile piston?

The piston’s and Oldsmobile’s spec is 0.003. They were double the spec! Piston to deck clearance of 0.015. This isn’t necessarily bad, but stock is 0.025. The primary purpose of this rebuild was to correct issues, and achieve reliability and longevity.