None.First off these type products are used as an emergency repair and are not permanent no matter what they claim. Secondly these type products can clog the radiator, heater core, and coolant passages within the engine. You may drive the car for a few thousand miles but in the end you will have to replace the head gaskets. You are just postponing the inevitable and may end up doing more damage. Have it done right and do not use any of these type products.
that is a bad head gasket or blown head gasket the engine needs to be repair
NO! These type products are only an emergency repair. The only permanent repair is to remove and replace the blown gasket. Besides these type products can cause clogging of the cooling system. Do not use them.
You have a blown head gasket, cracked head, or both. The engine must be dissembled to make the repair. Stop driving this car immediately or you will destroy the engine.
Start with the basics. A complete cooling system service. Drain the coolant, flush the cooling system with the heater control set to hot, replace the thermostat, clean the exterior of the front of the radiator, and bleed all air out of the system. This should correct the problem unless your cooling fans are not working, or you have a blown head gasket. If you are loosing coolant with no apparent leak, exhaust smells sweet, or coolant in the oil, you have a blown head gasket. Failure to repair this will destroy the engine. Make sure you cooling fans are functioning as they should. With the A/C on one fan should run all the time.
More than likely an airlock in the cooling system, bleed the system and should be fixed.
HEAD GASKET ! HEAD GASKET! blown head gasket is allowing compression from 1 or more cylinders into the cooling system. you can try cooling system repair tablets that are made by g.m. for this problem. however this likely wont cure the problem. head gasket replacement for a 4.6 caddy costs several thousand . good luck!
No. He can tell you if it is blown but not if it is about to blow. Clay is 100% right. Remember that overheating can be caused by other problems or not performing routine maintainance-- which in turn may cause the head gasket to fail AND all steps should be taken to inspect/repair the coolant system. The head gasket failing or head warpage may be the result of the cooling system not working properly.
If the vehicle does not have any bad head gasket symptoms like fluid loss or cooling system pressure build up or white smoke out the tailpipe then the head gasket does not ever need to be replaced.
You pressure test the cooling system
Air bubbles in the cooling systems usually means that the head gasket has gone out. As with most auto mobiles, air in the cooling system means exhaust is getting into the cooling system through a break in the head gasket. A break has probably occurred between the cylinder ring on the gasket and on the pressure stoke is passing through to the water port in the block at the top of the cylinder between the head and the cylinder indicating a break has occurred in the gasket.
more time then not a leaking head gasket or a sleeve
leaking head gasket or improper fluid in cooling system