Radiator Drain Cock - Replacement

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Think we all agree ... that Toyota designed the FJ40 series correctly; but why did they make the radiator drain cock plastic???

Desperately looking for a solution that works ... need to plug the hole. What innovative solutions have you guys come up with?
 

ToyotaMatt

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Think we all agree ... that Toyota designed the FJ40 series correctly; but why did they make the radiator drain cock plastic???

Desperately looking for a solution that works ... need to plug the hole. What innovative solutions have you guys come up with?

They didn’t …

You have. A non-OEM toyota radatior drain plug and most likely a aftermarket radiator it self

This is why :



Originally it was a long cast iron tube with a brass pet-cock

They eventually rusted away to nothingness and leaked total failure..

I said that can’t happen any more and stopped that monkey business .

Marine grade Nickle alloy infused red brass will outlast man kind …

So we now can keep our good OEM radiators



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GA Architect

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Think we all agree ... that Toyota designed the FJ40 series correctly; but why did they make the radiator drain cock plastic???

Desperately looking for a solution that works ... need to plug the hole. What innovative solutions have you guys come up with?
FWIW: In the photo below, the zinc plated large six-sided extender is a Toyota OEM piece that comes with the 16400-49356 radiator. As for the plastic plug, it is off my CSF 2888 Radiator. This plastic plug is a M10x1.50 unit. The brass extenders are M10x1.50 extensions with allen head plugs.

IMG_0844.jpg
 
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KennyBob

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FWIW: In the photo below, the zinc plated large six-sided extender is a Toyota OEM piece that comes with the 16400-49356 radiator. As for the plastic plug, it is off my CSF 2888 Radiator. This plastic plug is a M10x1.50 unit. The brass extenders are M10x1.25 extensions with allen head plugs.

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@GA Architect what are the M10x1.25 brass extensions for? I’ve got an aluminum radiator and I’m in need of an extension for it. Hoping those are them.
 

GA Architect

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@GA Architect what are the M10x1.25 brass extensions for? I’ve got an aluminum radiator and I’m in need of an extension for it. Hoping those are them.
They are M10x1.50 adapters, see below:

Here is a 50MM extension: Pipe Fitting 1/8" NPT Female to Metric M10 M10X1.5 Male Brass Adapter N-#AC | eBay - https://www.ebay.com/itm/162531629821

Here is a 100MM extension: Fitting for Tooling Pipe to Metric 1/8" NPT to M10X1.5 Male 100mm Long | eBay - https://www.ebay.com/itm/202673046100

Also, I haven't taken a pic of my final extension pieces, but they have a slim nut screwed as far as possible. Then I soldered the nut-to-extension joint solid. That way I can use a rubber sealing washer between the extension & radiator....However, I'm still running my original extension, seen here ( Post #10 ).
 

middlecalf

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Which do you guys prefer, the hotter or cooler spark plugs?
 
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Yup, I got a 40 out of Oz that likely had a spark plug in place of the petcock for at least 10 years based on the buildup in the plug and how much the threads had been corroded. It only started leaking once I replaced the spark plug with a NOS petcock and extension...

is it leaking at the rad where the extension screws in? it can be a weak area when extra torque is applied to remove the extension.
I always hold the extension when removing the drain so not to apply extra forces to the bottom of the rad, as I tore the bung out of a rad years ago, before knowing better
the pic @73FJ40 posted above shows the bung
 
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Oh, BTW, what's wrong with the plastic drain plug? They have always worked (as well as a spark plug) for me.

the old ones weren't plastic
like the pic @73FJ40 posted above
 

acy76

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Bumping this in case it helps someone else, either in a pinch or permanently: I ran into this issue with an OE FJ55 radiator. Someone had removed the drain assembly already when I bought the truck.

I installed a spare/broken block drain in its place and it threaded in and has not leaked in heat cycle testing. See "before" photo here: New pig day - https://forum.ih8mud.com/threads/new-pig-day.1297194/post-14856199

It's only temporary unless it works.

These block drains are still readily available in several flavors from the dealer or vendors here for less than $20.
 

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