valve stem seal replacement only with compressed air threads? (1 Viewer)

[landcruiser3DP]

IF you go ahead with this adventure, forget using compressed air. A much simpler approach with much less chance of screw ups while you are at it, is to feed a length of small diameter rope in through the sparkplug hole and then bring the piston up toward the top of the stroke until the rope will not let it come up any more. This will solidly and definitely keep the valve in place. Compressed air is not as assured to do so. And there will be no leakage of rope... and the rope will not be trying to push the piston down.

Freeing the valves from the keepers and retainers is a lot tougher on the 1fz than the old F series engines, old chevy small blocks and the like.

While it might sound like a cool idea, I just about guarantee that you will not be able to dislodge the keepers with only compressed air holding the valve in place.

I'd not recommend it as an undertaking for a low experience low knowledge beginner's project.

"i did a BG oil treatment which seemed to be recommended on here awhile back but it only made it worse." There is no truth to any claims of "miracles in a can" to solve any actual mechanical problem.


Mark...

you're saying to feed string into each spark plug hole and to get it under the piston to bring it to TDC? so the piston holds the valve in the seat?

 

[landcruiser3DP]

here is @Doso 's thread: LANDCRUISER 80 SERIES 1FZ FE VALVE SEAL REPLACEMENT IN THE TRUCK INCLUDES # 6 CYLINDER! - https://forum.ih8mud.com/threads/landcruiser-80-series-1fz-fe-valve-seal-replacement-in-the-truck-includes-6-cylinder.1228555/

 

[Eyedaho]

you're saying to feed string into each spark plug hole and to get it under the piston to bring it to TDC? so the piston holds the valve in the seat?

String piles up on top of the piston, then piston pushes string into valve to hold it in place.

 

[landcruiser3DP]

String piles up on top of the piston, then piston pushes string into valve to hold it in place.

ah. you're saying to like spool some string into the spark plug hole and manually turn the crank to TDC?

 

[Mark W]

ah. you're saying to like spool some string into the spark plug hole and manually turn the crank to TDC?

yes.

Mark...

 

[Mark W]

here is @Doso explanation:

1- The battery was disconnected
2- I took out the air box
3- I removed the throttle body and heater valve
4- Removed the plug wires and the valve cover
5- removed the cam shafts and the valve shims

DO NOT TAKE OUT THE HEAD BOLTS

6- Use a compression tester as shown in the video to hold the valve in place.

a- Screw the tester instead of the spark plug
b- Use about 40 psi
c- Then and only then take out the valve keepers.

7- Replace the valve seals
8- Reinstall all components in the reverse order

If you feel like this is any sort of actual instruction for a Cruiser hobbyist as to how to get this done... then I am gonna send you to Damascus with "instructions" to come back with a signed agreement that creates world peace and happy ever afterness for everyone.




Mark...