I just bought some re-manufactured calipers for my 1990 miata. And the banjo bolts don't fit into the new front calipers.
So I have couple questions. First does front and rear banjo bolts the same?
What are the specs of the banjo bolts where I can I buy some.
I have a feeling from what I read around that the reman ones are coated with something that might make it hard to thread the bolts in.
The front bolts fit with no effort in the new rear calipers but no chance to get more than one thread in on the front ones.
Let me know if you have any advice.
Thanks
Poorly remanufactured calipers will have been "sandblasted", resulting in cobbled threads. You have a couple options. You can take an existing banjo bolt, Dremel a slot across the thread, thus making a makeshift "thread chaser" to rehabilitate the calipers.
Once you run a sacrificial bolt all the way down and back, it should seal up - but - a caliper that has been carelessly sandblasted by a cut-rate rebuilder is not a caliper you want on your hotrod.
My personal opinion is that the best calipers you can put on your car are "used" original Mazda calipers, that have been inspected and/or properly rebuilt. I have seen such calipers from many of the trusted sources on here - specifically, ESA, PlanetMiata, and ThePartsGroup.