Question 1

Can broken Valve Spring, Valve Spring Retainer and Valve Stem Oil Seal be replaced without removing the cylinder head on Mazda MX-5 Miata?

Accepted Answer

Defective valve stem seals and broken valve springs can be changed without having to remove the cylinder head and only with a few special tools and a source of compressed air. In case of the absence of compressed air, a nylon rope of a certain length could be used to ensure the valves do not fall into the cylinder. Start with the removal of the valve lifters of the faulty valves, and make sure that they are placed back in their correct positions. Disconnect the spark plug of the affected cylinder, and in case all the valve stem seals are to be replaced, remove all the spark plugs. Spin the crankshaft until the piston in the affected cylinder reaches Top Dead Center on the compression stroke, do one cylinder at a time as per the firing order. Install an adapter into the spark plug hole and hook an air hose to a source of compressed air and spray the compressed air into the engine to maintain the position of the valves. When it is nylon rope, it is necessary that the piston be positioned about 45 degrees, before TDC, feed the rope up the combustion chamber, and make sure that the end is exposed to be removed. Turn the crankshaft until a slight resistance is met, and insert clean shop rags in any holes of the cylinder head to enable the parts not to fall into the engine. Compress the spring with a valve spring compressor, dislodge the keepers then the spring retainer and the valve spring then mark the highest point of the valve spring which will be lined up later. Measure the depth of the valve stem oil seal to the upper side and remove it. The cylinder head might require removal in order to carry out additional repairs in case the air pressure is not able to maintain the valve close. Tie a rubber band or a piece of tape to the upper part of the valve stem so it does not fall and remove the pressure of air. Check the spring of the valve and stem; and, when there is no binding in the guide, check it again. Once again apply air pressure to hold the valve in the closed position, lubricate the valve stem and fit a new oil seal to the given depth. Install the spring on top of the valve making sure that it is installed properly, followed by installing the valve spring retainer and putting the keepers in place carefully. Take the pressure out of the spring tool, unscrew the air hose, and take the adapter out. Lastly, it is possible to install the camshafts and the remaining parts in a reverse order, start the engine, and make sure that there are no oil leaks and that there are no strange sounds.

Question 2

Can broken Valve Spring, Valve Spring Retainer and Valve Stem Oil Seal be replaced without removing the cylinder head on Mazda Protege?

Accepted Answer

Replacement of broken valve springs and faulty valve stem seals can be done without the necessity to remove the cylinder head, and usually necessitates two special tools and a source of compressed air. In case of non availability of compressed air a piece of nylon rope may be employed to ensure the valves do not fall into the cylinder. Start by taking the camshaft(s) and valve lifters off the faulty valves, and store the lifters in the correct sequence so to re-fit. Take off spark plug of the affected cylinder and in case all the valve stem seals are to be replaced remove all spark plugs. Turn the crankshaft (referred to as crankshaft revolution) until the piston in the damaged cylinder reaches Top Dead Center during the compression stroke, and then move on to the next cylinder in the firing order. Insert an adapter into the spark plug hole and fit an air hose with a compressed air source and spray the compressed air to make the valves stay put. When it is nylon rope, the piston should be positioned at about 45 degrees before TDC, and the rope inserted into the combustion chamber and turned until slight resistance is felt. Insert stuffy shop rags in any holes on the cylinder head to ensure that parts do not fall in the engine and then compress the spring with a valve spring compressor to take out the keepers. Installation: Take out the spring retainer and valve spring with a mark on the upper end of the valve spring. Measure the depth till the upper side of the valve stem oil seal and strip. Tape or wrap a rubber band round the top of the valve stem to ensure that the stem does not fall off and then remove the air pressure. Check the valve spring and stem, and there must be none bound in the guide. Repeat air pressure to hold the valve in the closed position, and lubricate the value stem, and place a new oil seal, taking depth of installed as needed. Install the spring on the top of the valve making sure that it is placed properly and the valve spring retainer goes on and the spring is compressed to install the keepers. Take the spring tool off the pressure, making sure that the keepers are in place and the air hose is disconnected and the adapter removed. Lastly, install the camshaft(s) and the other components in the reverse order and start the engine to determine the presence of oil leakages or abnormal noises.

Genuine Mazda Valve Spring Retainer

25 Valve Spring Retainers found

Mazda Valve Spring Retainers Part Number: AJ03-12-113

Mazda Valve Spring Retainers Part Number: YF09-12-113

Mazda Valve Spring Retainers Part Number: PE01-12-123

Mazda Valve Spring Retainers Part Number: SH01-12-123

Mazda Valve Spring Seats Part Number: FS01-12-123

Mazda Valve Retainer Part Number: JF01-12-123

Mazda Valve Retainer Part Number: F801-12-116A

Mazda Valve Spring Retainers Part Number: CY01-12-113

Mazda Valve Spring Retainers Part Number: 1F22-12-122

Mazda Valve Retainer Part Number: JE26-12-113

Mazda Valve Spring Seats Part Number: BP6D-12-113

Mazda Valve Spring Retainers Part Number: 1F01-12-122

Mazda Valve Spring Retainers Part Number: PE01-12-113

Mazda Valve Retainer Part Number: B660-12-123A

Mazda Valve Spring Retainers Part Number: LF01-12-113

Mazda Valve Spring Retainers Part Number: B541-12-1B3

Mazda Valve Spring Retainers Part Number: B54112123

Mazda Valve Retainer Part Number: B6BF-12-113

Mazda Valve Retainer Part Number: BJ01-12-113

Mazda Valve Retainer Part Number: BP05-12-113

Mazda Valve Spring Retainer

Mazda Valve Spring Retainer Parts and Q&A

Related Mazda Parts

Browse by Model