How big is the crankshaft on a Mazda Miata?
If you’d like, verify the stronger crankshaft and larger bolt are fitted by measuring the bolt shoulder diameter to be 1.455 inches. If your Miata is a 1990 or 1991 with VIN 209446 or less, you have a crankshaft with a smaller diameter nose. (Note: according to Mazda, the European spec MX-5 breakpoint is at 127442.)…
How big is the pulley bolt on a Mazda Miata?
If your Miata is a 1990 or 1991 with VIN 209446 or less, you have a crankshaft with a smaller diameter nose. (Note: according to Mazda, the European spec MX-5 breakpoint is at 127442.) The pulley bolt shoulder diameter is 1.128 inches.
What happens if the crankshaft nose breaks off a Miata?
If the crankshaft nose breaks off, this is easy for a mechanic to diagnose. The car will not run and the mechanic finds the pulley assembly laying on the lower splash shield. In all examples, repair is the same; replace the crankshaft. I CAN HAVE A PROBLEM WITHOUT NOTICING?
Where to put the crankshaft key on a Miata?
If the tip of the crankshaft is closer to 1/2 inch back in there, you have the dreaded short nose part. Withdraw the key with needle nose pliers. Make note of the chamfered corner, it should be on the back of the key and face toward the crankshaft. The key should not be bent, deformed, or mooshed.
Can a crank bolt be removed from a Miata?
There’s an issue with removing the crank bolt, namely that turning it will turn the engine. If you use a breaker bar on it while the engine is on a stand or in the car with the car in neutral, it’ll just spin. If the engine is in the car and the car is in gear, it will actually turn the wheels. You have three ways to remove it.
If you’d like, verify the stronger crankshaft and larger bolt are fitted by measuring the bolt shoulder diameter to be 1.455 inches. If your Miata is a 1990 or 1991 with VIN 209446 or less, you have a crankshaft with a smaller diameter nose. (Note: according to Mazda, the European spec MX-5 breakpoint is at 127442.)…
How do you get a pulley off a Miata?
Crank bolt tool bolts to the plate, the other end smacks into the water pump. If you can get the pulley off without removing the crank bolt, you can use the tool pictured from Flyin Miata. In the picture, I was actually torquing the bolt – you’d turn it around to loosen it.
If your Miata is a 1990 or 1991 with VIN 209446 or less, you have a crankshaft with a smaller diameter nose. (Note: according to Mazda, the European spec MX-5 breakpoint is at 127442.) The pulley bolt shoulder diameter is 1.128 inches.