![]() ![]() (More on this later.) We surveyed mechanics from around the country to get accurate, real-world estimates for how much you can expect to pay when a head gasket goes bad, and the results were higher than we were expecting. All deals with having carbon in our fuel, very poor heating value with a host of problems.Ĭarbon build up always has been a major problem, not only this, but outputs CO2 and CO that is a killer.Almost every car has a head gasket in its engine, but the cost to replace this crucial component can vary widely, usually because of the amount of labor involved. So by fixing one problem, created another. This crap from the crankcase would pile up on the face of the injectors and cause spray problems. ![]() Was fed back to the base of the carburetor so the carburetor would stay clean, but this all changed when manifold fuel injection was used. When overhauling an engine, you literally needed a shovel to get rid of the sludge in an engine. Would help if you shifted into neutral when coming to a stop. ![]() When a breather pipe was used, crankcase would have a vacuum that sucked up road dust when you took your foot off the gas. Positive crankcase ventilation was a welcomed change when they came out in either the late 50's or early 60's. But still wonder how the new valve cover differs from the old one. Loose bolts could be the cause, RTV would definitely help.ĭidn't go that far to even remove a bolt, just that they were all loose. Another problem using plastic, is typically the rate of thermal expansive with temperature is greater than said cast aluminum.ĭid read some post where oil leaks were noted, in particular on the inner part of that U. Without the spacers could crush the gasket.īut would stand to reason if all the valve cover bolts were loose, gasket wouldn't have any compression whatsoever. So with the bolts tight the amount of compression of the gasket was limited. Remove the two torx screws with a T-30 torx bit/screwdriver.ĭo these sleeves or metal spacers extend out the bottom of the valve cover? If I compare this with the Fel-Pro gaskets using sleeves or spacers, they were not as thick as the gasket itself. It's that piece of plastic on the top of your engine that "ECOTEC." Once you lift it off, you will see the ignition coil assembly. The first step will be to remove the ignition coil cover. The procedure is in fact rather simple, but I will walk you through it step by step. You will also need some RTV silicone or engine sealer.Į-10 socket and ratchet ( Available on ) The valve cover comes as a kit, which includes gaskets and bolts pre-assembled. GM part number 25198874 (Camshaft cover with bolt and seal), Available on. The old design is on top, new design is on the bottom. The following image compares the primary cosmetic difference between the old design and the new one. In addition, I like to replace known defective parts ahead of time as preventive maintenance. As my dealership is a significant distance away from me, it is more cost-effective given the value of my time to order this part and install it myself. The valve cover was at one point redesigned due to a high rate of failure. It is covered under the 5 year, 100,000 mile warranty from GM, but you may choose to perform the service yourself under certain conditions. Whether due to a leak in the gasket or a failure in the PCV system, this valve cover may need to be replaced. The valve cover of the 1.4L Turbo engine houses the PCV system. ![]() How-To: Replace the Valve/Camshaft Cover (1.4L Turbo) ![]()
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