MaK Products

[eugyno]

We are experiencing cracks on the exhaust valve inserts for two MAK engines on a customer's cement factory...please does anybody

know what could be the problem be and what is the solution to this cracking.

your suggestions and inputs will be greatly appreciated.

thanks

[KANEDA]

Hello eugyno,

What is your engine model?

K. 

[colgamj]

eugyno--

One possible explanation could be the fresh water quality.  We have seen similar problems -- what we call "Stress Cracking Corrosion" -- which is caused because of an incorrect mixture of fresh water additives in the HT-water system.

Could this explain it?