Valve covers, camshaft covers, how about valve spring keeper covers, or camshaft solenoid valve covers, still the same thing.
1903 Buick never had a problem with an OVH valve engine cover, it didn't have one. But has been a GM problem every since with those cheap tin ones. Finally got a break with 80's Japanese cars, used a case aluminum valve cover, 88 Supra still has that. 454 CID engine got a Fel-Pro gasket that finally works.
1.4L uses a plastic one, if you think aluminum has a terrible thermal coefficient of expansion, look into plastics. Always checking the some old 18 bolts on mine, always find 3 or 4 of them loose. Need a Torx E10 socket for these. Wouldn't be near the problem if GM used aluminum and since they are covered by that five year PT warranty, had to replace a ton of these. If they had a bean counter with brains, but no such thing of a bean counter with brains, would have been far ahead money wise.
Plastic intake manifolds are not too bad on a four, side mounted and ain't got no coolant flow through them. But were a disaster on V-6's or V-8's due to thermal expansion and contraction and do have coolant flowing through them. Guess those engineers didn't know how to deal with bean counters.
If you are under five years and under 100K miles, just take it in to a good Chevy dealer, ha, getting hard to find these, they will replace it for free. Not only seal leaks, but may have a crack in it. Mine had a crack.
