Does Gunk block sealer work

These types of sealing products are really just a short-term fix to help you out of a bind. they do not last a very long time and sometimes only a few miles or kilometers. The real fix is getting your engine repaired before more damage is caused and the repair cost increases.

Temporary fix. Would never totally trust it. At least till I drove it in town a few months and still would not totally trust. My problem would be it would fix for month or two and then strand me between towns some where!