Have recently posted inquiries about solutions for my 1999 Eldo (82K) blown head gasket. I have read many posts about the available solutions from drilling and installing inserts in the block ( requires removing the engine, installing inserts and re-installing engine - typically about $3000) To replacement engines at about $3500 + installation @about $2000 = total close to $6000 ) I love my Eldo and it broke my heart to have to deal with a $6000 repair to keep it. As I agonized over a solution, I discovered Thermalweld - https://thermalweld.com/ as any Cadiiliac Northstar owner with a head gasket problem, I was very skeptical about a liquid solution to a blown head gasket BUT after visiting their website and talking to the chemist/owner (Robert Hooper) who actually invented the Thermalweld chemical liquid solution - I decided there was no downside to trying it ( his formula will not clog anything in the cooling system) - if it didn't work - I was only out $250. Far less than $6000. I flushed my cooling system of Dexcool yesterday and refilled with water (according to detailed installation instructions) Following instructions I have driven the Eldo over 50 miles and have not experienced any overheating - amazing to me! I couldn't believe that Mr. Robert Hooper (owner) is available as often as you need him - to hold your hand thru the entire installation. Now I know all the experts are going to poo-poo this solution -but the bottom line is - initially it has worked for me. If enough are interested I will repost my results during the next 60 days.?