My car (RWD) has vacuum leak and has the code PO171/PO174. I find some engine oil at the bolt well of the valve cover on the bank 2 side. Can the vacuum leak come from the valve cover? What is the main function of the valve cover? Thanks.
get a new p.c.v. vale . and in air cleaner is a a small filter that hose clips to . .most imporent is pcv vale is working and this will stop
Valves and the cam or rocker arm assemblies on top of the cylinder heads are lubricated by engine oil that is pumped or splashes up from the crankcase. Valve covers just contain the oil and keep dirt out of the engine. Vacuum comes from the intake manifold, and is routed to various locations through small flexible rubber hoses. A vacuum leak is probably from one of those small rubber hoses that has cracked or come loose.
there is no vacuum in the valve cover. the vacuum is in the intake the valve cover is leaking oil. the valve cover covers the rocker arms.
First of all no. And. Second of all, to cover the valves. Little oil tubes come up to the rockers and lubricate them and the rods, springs, valve guides, top of valves. If you did not have covers than oil will spray all over engine compartment.
