ARCHIVE Wits' End- so much free time to develop more stupid crap (AKA PS plug)

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NLXTACY

Wits' End
Joined
Dec 7, 2007
Threads
111
Messages
20,769
Location
Medford, OR
Here's the deal, as many of our 80 Series Land Cruisers increase the age and road time, things start, well...breaking down. Its inevitable. But some things breaking down can be more annoying than catastrophic. That brings us to the gear driven power steering pump found on the 1FZ Land Cruisers. When manufacturing the cast iron casing for the pump, Toyota engineers added in a type of expansion plug. This plug is made from cast aluminum and is held in place by an o-ring and a 1deg taper on the plug. Well it takes 20 years of heat cycling, and pressure, for this plug to disappear in the middle of nowhere.

Once this plug pops out, all of the power steering fluid from the reservoir and the pump WILL all leak out. This basically results in "armstrong" steering. On the 80 Series this really sucks, but the truck is still driveable.

There are simple trail fixes, you can:
• whittle a stick to about 1/2" and about 2" long and just pound it in the hole
• apply JB Weld and let it seal up
• say screw it and build up your arm strength

Or you can have a plan A, which brings up this little gizmo. This can only be used in an "emergency" (word used loosely) situation once the OEM plug has already fell out. But once it has this plug just needs to be pushed into place, just until the o-ring catches. Then the lanyard is run around the large 5/8" power steering hose and the screw tightened to not only save the trip, plug the hole, but also make sure the plug isn't lost again due to the lanyard. So besides some leaking, why bother with this? Losing the plug guarantees you needing to replace the pump. This buys you plenty of time. ;)

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Even though this won’t fit my pump, the very fact that there’s someone out there even thinking about, let alone proactively solving problems like this, makes me feel better about living in a world with an aging Land Cruiser.
 
Wow, and I thought only I over-thought stuff....
 
Even though this won’t fit my pump, the very fact that there’s someone out there even thinking about, let alone proactively solving problems like this, makes me feel better about living in a world with an aging Land Cruiser.
Just take all my money Joey! You're like a 80 series Crack dealer. Lol! A crafty dealer though
 
I love your thinking, my wallet....not so much 😎
 
Neat product. Love the idea. Any Ideas on why an engineer at Toyota would put an expansion plug there? Is it designed to blow out before a "catastrophic" failure occurs?
 
I'm still kicking myself for not sending Joey a bunch of money when he had the December sale going.
 
This is a great trail fix, when pump is off engine would it be possible to Tap pipe thread and install threaded plug? I haven't had any problems or leaks but, if I take pump off I would do a more permanent repair.
 
This is a great trail fix, when pump is off engine would it be possible to Tap pipe thread and install threaded plug? I haven't had any problems or leaks but, if I take pump off I would do a more permanent repair.


I would just drill a hole 90 degrees to the bore of that plug and add a roll pin.
 
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Based on a reply from instagram, one of the pumps that blew the OEM standard plug, was overheating on switchbacks, which supports the idea that the plug functions as a way to prevent catastrophic failure from high pressure build up.

I would be hesitant to "permanently" plug it with some of the other ideas mentioned such as threading or staking it.

Joey's design would give you a chance to possible identify the overheating issue, or give it time to cool down, re-plug, and refill with ATF fluid.
 

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