I have a 1998 Buick riviera 3.8 ltr v6 w/supercharger and I am leaking coolant from a connection that I have no knowledge of underneath the supercharger close to the tensioner can someone please tell me where I can find free online troubleshooting guides and/or possibly who offers a an inexpensive service to diagnose the problem

If your vehicle is leaking near tensioner you possibly do not have a blown head gasket.there is a L shaped plastic pipe right behind the tensioner they deterioate and leak i believe they call it intake bypass tube there are 2 of them one the engine you will need to replace both of them oreillys sell the metal ones which last you get two in the pack they are only about 8 bucks about a 1 1/2 hour from start to finish

You have a blown Head Gasket. Stop driving the car. Only drive the car in EMERGENCYS. You need to check your oil to make sure that you are not mixing antifreeze with oil. If you are, you need to flush the engine and change all of your seals. A head gasket set costs about 75 bucks. But to hire someone to do it is expensive. It might cost you about eight hundred bucks to get and experienced person to change your head gasket. If you want to know how to do this, shoot me an email @ [email protected]. I can explain to you how to do it.