Mazda Rx7 13b Blown Coolant Seal Problems And Fixes
 

One of the biggest problems Mazda has faced through all of the years of the road reaction has been the coolant seal. Well they have changed the position and the size of the passage several times between the housing and the irons it has been apparent It is the Achilles heel of the rotary engine.

So here are a few solutions to take care of the problem of a blown coolant seal if you do not have the money to buy a brand new iron or if they're no longer available and you do not trust anything used you have found to be any better.

Chris at banzai racing can weld and repair most broken coolant passages on iron plates:
Banzai Store

here is a link to a group with several techniques:
https://www. facebook. com/ mazdarx7rebuilds?mibextid=ZbWKwL

The most detailed engine assembly video with tips on saving future passages, NO WELDING REQUIRED!