Toyota 90080-31043 Seal, Valve Stem Oil

You can Select Your Vehicle to check if 90080-31043 fits your vehicle.

Valve springs which are broken and valve stem seals which are faulty are replaceable without the removal of the cylinder head usually by a use of two special tools and compressed air. It is recommended to begin by the removal of the valve cover and, then the timing chain, camshafts and lifters of the cylinder head. If replacing all the valve stem seals, simply pull out all the spark plugs, but if only the specific cylinder with the problem is being worked on, pull out the spark plug from this particular cylinder only. Rotate the crankshaft until the piston of the cylinder to be sealed is at the TDC on the compression stroke and if sealing all the seals then begin with cylinder #1 in the firing order. Insert an air hose adaptor into the spark plug hole and attach it to the air compressor to use air to set the valves stopper. Pack shop rags around the valve holes to avoid dropping of debris in the engine. Tap the indent on top of each of the valve spring retainer with a hammer so as to free it from the keepers then compress the valve spring and tap off the keepers. If such pressure cannot hold the valve closed, the cylinder head will in most occasions require removal for repairs. Pull out the worn out valve stem seal paying attention to whether it is for the intake or exhaust before poking a hole on the upper part of the valve stem and retracting the spring and keep the valve stem tied with a rubber band or taped before deflating the air. Check the state of the valve stem and its ability to slide along the guide. Apply air pressure to hold the valve in place, coat the threads of the stem with engine oil and fit poly-kep set screw gasket on the valve guide. Install the valve spring and retainer and using compressed air to compress the spring depos on the keeper groove with grease to immobilize the keepers. Finally, loosen the spring tool pressure to allow the keepers' seating, detach the air hose, and take out the adapter. Camshaft, lifters, timing chain, and valve cover next to the spark plugs and ignition coils need to be reinstalled. Last but not the least, a spin of the engine should also be done to examine the probability of oil leaks, loud sound coming from the valve cover.

If air pressure fails, the valve face or seat may be damaged, and the cylinder head will have to be removed for repair.

This is one per order