Hi,
on my 2011 Tahoe with 151k I am going to replace the coolant.

Is it worth to add a radiator stop leakage proactively? Like Liqui Moly Radiator Stop Leak or RAVENOL Professional Radiator Stop Leak?

Regards
Niels

 

I would not use it if there are no leaks. When there is a leak it is better to repair the leak than to use a sealer.

 

Agree

 

Make sure you use distilled water vs tap water, your cooling system will appreciate it. The only thing I add is NAPA water pump lube (think it was called #13) on the advise of a radiator shop decades ago. No science there, but makes me fell better when I'm done!

 

nope to any leak seal product it will swell and soften all rubber hoses