That is a very COMMON PROBLEM WITH those engines. You need to replace the intake manifold gaskets to fix that problem.
Yes, always replace gaskets on any projects requiring them.
car must be lifted its not a simple job as the compressor comes ou the passenger side wheel well.
Yes you should replace the thermostat now to insure trouble free operation afterwards, actually as long as the main bearings were not damaged from the intake leak, you should also replace the head gaskets at this time, use only felpro gaskets and you will have troublefree performance for years to come. These are good torquey engines, gm just went cheap on the gaskets when new
its under the intake manifold if its a northstar
If your Caddy is a 1992, it doesn't have a Northstar. They are in '93 and newer. Please determine the actual type of engine and repost your question.
Yes
For sure, replace ALL the gaskets involved. When you purchase, ask for a head gasket set and you will get all the gaskets that are used.
These engines do not blow head gaskets. You need to replace the black plastic intake or plenum. They will leak coolant into the combustion chamber. Some roge mechanics will tell you it's head gaskets to get you to pay more money. Remove upper intake, remove spark plugs to get coolant out and replace and fill with coolant.
how many gaskets and which ones are needed when you replace the knock sensor on a Nissan frontier w/a 3.3l v6 engine?
if the miles on the engine aren't too high, then just replace the head gaskets. if the whole engine is tired go ahead and swap out the motor. its a lot cheaper to do the gaskets then to buy a new motor.
If that is the Northstar engine, yes.