Blaen99

iTrader: (1)

I've recently came across a rotary engine with about 40kish on it since last rebuild. However, it may have a coolant seal problem.

Is it necessary to replace the hard seals, or can I just go in and replace the soft ones without issue?

RotaryRocket88

iTrader: (7)

You don't necessarily need to replace the apex seals, but if it has coolant damage, you could also be looking at replacing the housings and rotors.

dot_txt

iTrader: (1)

And while you have the engine apart, you may as well do a full rebuild.

turbo-111

just out or curiosity how long do the stock seals last, water seals i mean ?

Scrims

iTrader: (2)

With the motor apart, I would at the very least measure all the hard seals per Haynes manual/FSM and replace what needs to be. (but if one apex seal is out of spec, replace them all).