Rotary Car Club - View Single Post - Redline Water Wetter is Safe for Round motors

rx4ur7 · 10-14-2010, 05:18 PM

Just as I thought, there in could be the problem. If a motor is built properly and to Mazda specifications or has never had a heating issue, gotten hot and warped a housing, coolant should never get near the seals.

That is the way the motor was designed. In a perfect world we would not even need seals. Two surfaces machined to 0 tolerance would not require any gasket or seal.

Far too costly for mass production. So we have to deal with those few thousands.

As stated, I have never had a failure of a seal by swelling or disintigration even in the bridge motor where the seals are exposed to fuel and possible coolant.

I will try that test though, straight redline and also with the proper mix which is 4 oz redline to 1 gallon water.

Still if coolant is getting to the seals there is an issue not related to coolant.

Even so, we have used redline in motors that have just started to blow bubbles, FC's mostly, and got them to last a couple of seasons before having a complete seal failure. Most of those got hot a couple of times and there was no way to save them in the long run since they warped the housings. Seals were still fine except where they burnt out in the compustion area.

10-14-2010, 05:18 PM	#3
rx4ur7 Rotary since 1972 Join Date: Nov 2008 Location: Tucson Posts: 231 Rep Power: 17	Just as I thought, there in could be the problem. If a motor is built properly and to Mazda specifications or has never had a heating issue, gotten hot and warped a housing, coolant should never get near the seals. That is the way the motor was designed. In a perfect world we would not even need seals. Two surfaces machined to 0 tolerance would not require any gasket or seal. Far too costly for mass production. So we have to deal with those few thousands. As stated, I have never had a failure of a seal by swelling or disintigration even in the bridge motor where the seals are exposed to fuel and possible coolant. I will try that test though, straight redline and also with the proper mix which is 4 oz redline to 1 gallon water. Still if coolant is getting to the seals there is an issue not related to coolant. Even so, we have used redline in motors that have just started to blow bubbles, FC's mostly, and got them to last a couple of seasons before having a complete seal failure. Most of those got hot a couple of times and there was no way to save them in the long run since they warped the housings. Seals were still fine except where they burnt out in the compustion area. Last edited by rx4ur7; 10-14-2010 at 05:47 PM.