DIY 009 M-E-L valve seal replacement 430 W/out removing heads

[59lincolnrag]

DIY009 M-E-L valve seal replacement 430
Don’t get in a pickle.! Replace those valve seals.
430 Valve Stem Seal Replacement

While the general procedure outlined herein may be applicable to many other motors, this write up is specific to the M-E-L 430 V-8. Check your service manual for details about this and other motors.

Time required: 2-4 hours.

Note: Part numbers are for reference only

Special Tools/Parts:

1. Air compressor.
2. Compression gauge with an extension.
3. Valve spring compressor (optional) I used a Pickle fork for tie rod ends.
4. Valve cover gaskets
5. Appropriate RTV (optional) Your choice.
6. 16 valve seals 8 intake 8 exhaust.
7. Safety Glasses.
8. Magnetic wand.
9. Valve Seals Check your application

SEALED POWER MV1775
Inside Diameter 0.342
Overall Length 0.79
Inside Length 0.4
Outside Diameter 0.906
Type TS
Part Comment Umbrella type

Alternate/OEM Part Number(s): MV1775C
SS 13399 FEL PRO

Alternate/OEM Part Number(s): C4TZ6571H, E6HZ6571A

The Procedure:

1. Remove the air filter housing, ignition wires miscellaneous parts, lines and hoses that might get in the way. Mark the wires!!

2. Remove the valve covers, At this point the push-rods and rocker shaft assemblies will be visible. You will replace the two seals one cylinder at time. Remember it is critical to put the push-rods, and rocker arm assemblies in exactly the same position as when you took it out. Now is a great time to clean and check those push-rods for bends by rolling them on a flat surface. You can dis-assemble the rocker assemblies to clean them as well. Be sure to carefully lay out the parts and re-assemble in the same order.

3. Remove all the spark plugs and fill the first cylinder with compressed air using the extension of your compression gauge
*** Remove the small air valve at the businesses end *****
You'll hear air escaping from your cylinder, so make sure your compressor is on. 100 psi is good.

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4. Gently rap on the exposed valve stem and around the keepers with a hammer and a deep well socket. This will loosen the keepers so when you actually compress the spring they can be easily removed. Without this "persuading", you may not be able to separate the keepers from the valve stem. It is helpful, but not necessary to have an assistant.

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5. Install one of the rocker bolts along with the washer to the first threaded hole used for the rocker shaft support. Compress the spring using the pickle fork while grabbing or having your assistant grab the keepers. The more you compress, the easier it is to grab them. Be careful ... you don't want to drop a valve ...

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The keepers are tapered, small and prone to easy loss. Make sure to keep track of them.

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6. Remove the spring, retainer, and old seal or what’s left of it!

7. Do steps 3 - 6 for the other valves.

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8. I cleaned the area with a shop vac and an old funnel over the vacuum hose, small end down. Works like an anteater snout.

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9. Place the new valve seals over the valve stem then reassemble spring and retainer

10. Compress the spring and replace or have your assistant replace the keepers. Again, the more you compress, the easier it is to put those buggers on right. Repeat procedure for the other valve

11. Important. Make sure not to accidentally depress a valve as the cylinder may decompress. if this happens, you may lose the valve down into the combustion chamber. Also the engine will turn over when you pressurize each cylinder until that piston bottoms out.

12. Replace the push-rods in order. Carefully install the rocker assembly. Use some grease or assembly lube motor oil is just fine. Tip each rocker down to contact the push-rod. Torque down the rocker assemblies to 35-40 ft-lbs. Check your manual. Check to see that ALL push-rods are in place BEFORE cranking the engine. Turn the engine by hand at least one revolution.

13. Crank the engine a few times with the plugs out to get the oil flowing up through the rocker shaft assemblies.

14. Clean up your valve covers and areas where the gasket seals on the head, and put the valve covers back on. Snug down …don’t over tighten.

15. Attach ignition wires, miscellaneous parts, lines and hoses.