How do you remove the crank seal on a Miata?
There are two “proper” methods to remove the old seal: 1.) use a seal puller or 2.) carefully thread a screw – or two – into the face of the old seal and pull the seal out by grasping the screw(s) with a pair of pliers. There are several write-ups on removing the seals with screw method.
What can I use to replace a crankshaft on a Miata?
Your choices are to replace the crankshaft, substitute a nice used engine from a salvage yard, or install a new factory short block. Generally the least expensive alternative depends on each individual situation.
What kind of oil does a Mazda Miata use?
Most lifter noise is cured by switching weights of oil. Mazda recommends trying 5W30 oil first. Some Miata owners report switching to a heavier oil like 20W50 to stop the noise. additionally, some owners report switching to a synthetic oil such as Amsoil or Redline to alleviate the noises.
What can I do about the lifter noise in my Mazda Miata?
These items can be fixed under the Mazda warranty if your car is new enough to still be in the warranty period. Most lifter noise is cured by switching weights of oil. Mazda recommends trying 5W30 oil first.
How big is the crankshaft on a 1991 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.
Your choices are to replace the crankshaft, substitute a nice used engine from a salvage yard, or install a new factory short block. Generally the least expensive alternative depends on each individual situation.
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.
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?
Do you need to renew the front seal on a Miata?
In the past, we recommended renewing the front seal during timing belt service as preventative maintenance. Now, it would seem prudent to leave the pulley bolt undisturbed provided the seal is not leaking. Luckily, it is not necessary to remove the bolt and sprocket in the course of regular timing belt service in 1990 and early 1991 cars.