How do i clean the head out on a 1990 525i bmw before i put the valve cover back on

clean the engine and check where it is coming from. Is it at the front of the rear> do you smell burning oil when you switch off the engine? Clean an area under the engine compartment and see where the oil is dripping from and get back to us. Typical places for leaks are the valve cover gasket, oil filter housing bracket.

remove all parts covering your heads ,,clean your surfaces before putting new head gaskets on as well as the other gaskets that come with this replacement kit ..easy job as long as you label every bolt or nut you take off so you can put back on properly ...take the heads to a machine shop to be cleaned and checked for burnt valves and possible cracks

put in time and remove valve cover, front engine cover, timing belt ,exhaust at manifold, intake manifold and remove head bolts, pull head clean all surfaces replace gasket after head ck for cracks follow specs on bolts and put back together in a shop in would take about 4 to 6 hrs to do .

will try to help.if it's only the valve cover leaking,i'm guessing they sold you the rubber one that says ne rtv sealant needed. take your back off, try not to break the rubber seal when removing!clean the top of head where gasket goes. clean the valve cover really good!clean the grooves out that the gasket slides into. buy some blue trv glue, apply a thin coat to top of head, let it setup while you apply another thin coat to valve cover, let set 10mins. apply gasket to valve cover making sure to push the gasket into the grooves on valve cover. don't worry about neatness. let the valve cover set on a hard surface with the gasket against the hard flat surface[such as a garage floor,or clean driveway] after10 more minutes install the valve cover,make sure and take your time. place valve cover onto motor,than hand start each bolt to insure thay are going into the prope bolt holes. after you have each bolt hand started, start at center of valve cover snugging the bolts down to motor. do not crank down or apply excessive force when tightening those bolts. you should see some of that blue rtv glue coming out around the valve cover when applying torque to the valve cover bolts. only secure them snug at first. let car set for 15mins. start car and look for leaks around the cover, do not over tighten those bolts but you may need to look for a leak, go to bolt closest to leak and turn it 1/4 at a time until leak stops. but if you do this step by step, you'll not have a leak issue. you may have pinched the gasket when you replaced it. hope this helps and thank you for choosing fixya.com

The cylinder head gasket? Or the cylinder head cover gasket (valve cover gasket). If it was the valve cover gasket, make sure the shop drops a bead of rtv on the round corners. If they don't, it will definitely leak

Yes, you need a Rocker cover (valve cover) Gasket kit. Remove the valve cover, remove all old O-rings and cover gasket, clean grooves and mating surfaces without gouging or scratching them, put the new gaskets on as per factory recommendations, tighten to the proper torque and you're done. The spark plug holes in the cover are part of the valve cover gasket kit. Any Napa, Car Quest, Pep Boys, Auto Zone will have it.

I don't recommend that unless you have a full set of tools and a lot pf patience and organizational skills. But here goes. Remove the coolant, drain the oil, disconnect the battery cable. remove the spark plug wires. Remove all cables and wires going to the intake. Remove the air cleaner and hoses connected to it. Remove all heater hoses and raciator hoses. Remove all the vacuum lines, remove the fuel lines,caution they are pressurized and may spray gas into the engine compartment. Remove the serpintene belt and alternator, air pump, and ac compressor. Remove timeing chain cover. Remove timing chain. Note where the timing marks are on the crankshaft and on the cam or cams if you have more than one cam. Remove the intake manifold, remove valve covers. If you have have push rods for the valves remove them. You will have to back off the pressure on the valve lifters to remove most of them. Remove the head bolts and lift the head free of the engine. Keep everything in perfect order. The water pump and timing chain often uses different length bolts that must be put back in the same holes. Also the push rods are supposed to be put back in the exact order as some may have worn more than others. To reinstall just clean all gasket surfaces on the head, engine block, intake and exhaust manifolds, valve covers, timing chain cover, thermostat cover, etc. I would go ahead and replace the timing belt or chain, depending on which engine you have. I would also go ahead and replace the spark plugs and wires too. Once everything is cleaned up, just reverse the order

A tune-up and throttle body clean-up is a good idea, but mind you on those cars, the valve covers usually leak into the spark plugs and coils, causing the car to misfire. If you are replacing the plugs and find them soaked in oil; replace your valve cover gaskets or you will be back to the same problem soon after the oil soaks the new plugs back up again.

well it supose to blow air because your motor is moving at probley 6 or 7 hundred rmps but the resone it runs rough is because your losing compression when you open the cap but i would check your pvc valves and maybe have it pressure tested.

30nm 90 degrees, 90 degrees Renew bolts!!